Material based on a partially stabilized zirconia matrix and process for the preparation and use of the material

A material comprising: from 98-50% by volume of zirconia as a matrix, which is stabilized with i) either of from about 2 to about 3 mole percent of yttria ii) or of from about 10 to about 15 mole percent of ceria; iii) or a mixture of ceria and yttria in the range of amounts as given in i) and ii) the stabilizing oxides may be substituted against each other in a ratio from 1:99 to 99:1 and a maximum stabilization of 3 mole percent related to pure yttria and 15 mole percent related to pure ceria respectively are not exceeded, and wherein the term mole percent is related to the zirconia matrix and wherein the zirconia matrix is obtainable from a) a powder of particles of zirconia having a mean particle size of <0.35 μm, b) the particles are coated with the stabilizing oxides yttria and/or ceria for stabilizing zirconia, c) a stabilization of the tetragonal phase is performed via a diffusion reaction by a sintering process, and from about 2 to about 50% by volume of alumina of which from about ...

Method for the production of a ceramic molded part

A process for the preparation of a ceramic molded part from a suspension/dispersion with a solids content and a fluid content by depositing solids content at the periphery of a porous self-supporting support that is at least partially immersed in the suspension/dispersion and has the same shape as the molded part to be prepared, but with a reduced size, wherein: the solids content contains oxide-ceramic particles; the porous self-supporting support is detachably connected with a discharge in a zone that is not immersed in the suspension/dispersion; the suspension/dispersion is moved towards the porous self-supporting support by means of a positive pressure difference between a pressure prevailing in the suspension/dispersion and a pressure prevailing in the discharge; wherein the fluid content of the suspension/dispersion enters in the porous self-supporting support with depositing solids content at the periphery of the porous self-supporting support.

Molded member made of form-stabilized material and method for the manufacture thereof

Molded member made of form-stabilized material, comprising at least one first component and one second component, characterized in that the second component has a different pigmentation than the first component and the second component is disposed inside the first element, forming a boundary surface, in such a way that the boundary surface represents a spatially curved surface.

MOLDED MEMBER MADE OF FORM-STABILIZED MATERIAL AND METHOD FOR THE MANUFACTURE THEREOF

Molded member made of form-stabilized material, comprising at least one first component and one second component, characterized in that the second component has a different pigmentation than the first component and the second component is disposed inside the first element, forming a boundary surface, in such a way that the boundary surface represents a spatially curved surface.

Porous, silicate, ceramic body, dental restoration and method for the production thereof

The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.

UNIVERSAL VENEERING OF FRAMEWORKS OF DENTAL RESTORATIONS

A process for the universal, at least partial, veneering of frameworks made of framework materials of dental restorations having a coefficient of thermal expansion CTEby means of using a ceramic-based veneer material having a coefficient of thermal expansion CTE, wherein a veneer is prepared by a shaping process from a blank of the respective veneer material to be complementary to the framework, and permanently attached to the framework by adhesive bonding, wherein the difference (Δ) between the coefficient of thermal expansion of the framework material, CTE, and the coefficient of thermal expansion of the veneer material, CTE, is outside the range of 0≦Δ<2×10K. 1. A process for a universal , at least partial , veneering of frameworks made of framework materials of dental restorations having a coefficient of thermal expansion CTEby means of using a ceramic-based veneer material having a coefficient of thermal expansion CTE ,wherein a veneer is prepared by a shaping process from a blank of the respective veneer material to be complementary to the framework, andpermanently attached to the framework by adhesive bonding,{'sub': CTE', 'framework', 'veneer', 'CTE, 'sup': −6', '−1, 'wherein the difference (Δ) between the coefficient of thermal expansion of the framework material, CTE, and the coefficient of thermal expansion of the veneer material, CTE, is outside the range of 0≦Δ<2×10K.'}2. The process according to claim 1 , wherein said framework material is selected from the group consisting of a metallic material claim 1 , in particular an alloy of metal claim 1 , a ceramic material claim 1 , and a polymer material.3. The process according to claim 2 , wherein said metallic material is selected from the group consisting of gold-containing metals as well as cobalt- and/or chromium-based metals and alloys thereof.4. The process according to claim 2 , wherein said ceramic material is selected from the group consisting of glass-infiltrated ceramic materials claim 2 , oxide ...

Porous silicate ceramic body, dental restorations and method for the production thereof

A porous, silicate, ceramic body, optionally with different colors, with a first density, can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, is 25 to 180 MPa.

Composite material and method for the production thereof

A composite material with a porous inorganic-nonmetallic matrix and a second material, is characterized in that the porous inorganic-nonmetallic matrix has a bending strength of >=40 MPa as measured according to ISO 6 872; the second material is an organic material which at least partly fills the pores of the porous matrix; and the composite material has a modulus of elasticity, E, of >=25 GPa as measured according to ISO 10 477.

Dental restoration, method for its production and ingot

The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.

LITHIUM SILICATE GLASSES OR GLASS CERAMICS, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

The invention relates to glass ceramics based on the lithium metasilicate system (LiO SiO(LiSiO)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high- strength, highly translucent and chemically stable glass ceramic. 115-. (canceled)16. A lithium silicate glass or glass ceramic having the following composition:{'sub': '2', '50 to 70 wt-% SiO,'}{'sub': '2', '15 to 22 wt-% LiO,'}{'sub': 2', '2, '8 to 20 wt-% of a stabilizer selected from ZrOand/or HfO,'}{'sub': 2', '2, '0.1 to 4 wt-% KO and/or NaO,'}{'sub': 2', '3, '0.1 to 4 wt-% AlO, and'}2 to 8 wt-% additives.17. The glass or glass ceramic of with the following composition:{'sub': '2', '50 to 64 wt-% SiO,'}{'sub': '2', '17 to 20 wt-% LiO,'}{'sub': 2', '2, '8 to 20 wt-% of a stabilizer selected from ZrOand/or HfO,'}{'sub': 2', '2, '1 to 3 wt-% KO and/or NaO,'}{'sub': 2', '3, '1 to 3 wt-% AlO, and'}4 to 6 wt-% additives.18. The glass or glass ceramic of with the following composition:{'sub': '2', '55 to 64 wt-% SiO,'}{'sub': '2', '10 to 20 wt-% LiO,'}{'sub': 2', '2, '8 to 20 wt-% of a stabilizer selected from ZrOand/or HfO,'}{'sub': 2', '2, '0 to 5 wt-% KO and/or NaO,'}{'sub': 2', '3, '0.1 to 5 wt-% AlO, and'}0 to 10 wt-% additives.19. The glass or glass ceramic of with the following composition:{'sub': '2', '50 to 60 wt-% SiO,'}{'sub': '2', '10 to 20 wt-% LiO,'}{'sub': 2', '2, '8 to 20 wt-% of a stabilizer selected from ZrOand/or HfO,'}{'sub': 2', '2, '1 to 5 wt-% KO and/or NaO,'}{'sub': 2', '3, '0.1 to 5 wt-% AlO, and'}0 to 10 wt-% additives.20. The glass or glass ceramic of with the following composition:{'sub': '2', '55 to 64 wt-% SiO,'}{'sub': '2', '10 to 20 wt-% LiO,'}{'sub': 2', '2, '10 to 20 wt-% of a stabilizer selected from ZrOand/or HfO,'}{'sub': 2', '2, '0 to 5 wt-% KO and/or NaO,'}{'sub': 2', '3, '0.1 to 5 wt-% AlO, and'}0 to 10 wt-% additives.21. The glass or glass ceramic of with the following ...

Non-dense sintered ceramic molded body having at least two layers

A non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer. The body has a color gradient and maintains dimensional stability during sintering and forming. An admixing component and a common sintering temperature are used to control the volume decrease of the layers during sintering.

Coloring liquid for the homogeneous coloring of ceramic materials

A coloring liquid which contains metal salts as a coloring component for the homogeneous coloring of ceramic workpieces made of oxide ceramics, the coloring liquid having a viscosity of from 10 cP (centipoise) to 100 cP, preferably from 30 cP to 60 cP (as measured with a Brookfield Rheometer DV III and RV spindle according to DIN 53018).

LITHIUM DISILICATE GLASS-CERAMIC, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

Lithium silicate glass ceramic, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (Li2OSiO2(Li2SiO3)), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.

Composite material and method for the production thereof

A composite material with a porous inorganic-nonmetallic matrix and a second material, characterized in that said porous inorganic-nonmetallic matrix has a bending strength of ≧40 MPa as measured according to ISO 6 872; said second material is an organic material which at least partly fills the pores of said porous matrix; and said composite material has a modulus of elasticity, E, of ≧25 GPa as measured according to ISO 10 477.

Sealing of ceramic substances by means of electromagnetic centimetre waves, and receptacle for carrying out the inventive method

A method for manufacturing ceramic parts with a certain porosity by sintering using microwaves, the materials to be sintered being arranged in a vessel, wherein the microwaves introduce sintering energy into the materials to be sintered via electromagnetic waves in the range of vacuum wavelengths between 5 cm-20 cm in multimode having an electromagnetic power of up to one kilowatt, and besides being built from primary materials for the structure of the vessel, the vessel is built from a secondary material which comprises, in particular, a mixture of or mixed crystals of non-metallic, para-, ferro- or antiferromagnetic materials.

Material based on a partially stabilized zirconia matrix with cerium oxide and yttrium oxide as stabilizing oxides of zirconia, a process for preparation and use of the material

A sintered ceramic material comprising: a) from 98-50% by volume of zirconia as a matrix, i) stabilized with a stabilizing composition having ii) of from about 2 to about 3 mole percent of yttria and of from about 10 to about 15 mole percent of ceria; wherein the term mole percent is related to the zirconia matrix and iii) the stabilizing composition is present in the range of from about 1:99 to about 99:1; and b) from about 2 to about 50% by volume of alumina of which from about 5 to about 90% by volume is in the form of hexagonal platelets of general formula REAl 11018, where RE stands for rare earth metal.

Process for producing a non-dense sintered ceramic molded body having at least two layers

A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature T1 that is higher than the presintering temperature Ts of said at least second powdery ceramic material; the course of a curve of shrinkage S1 of said at least first powdery ceramic material differs from the course of a curve of shrinkage S2 of said at least second powdery material, wherein curve of shrinkage S1 is shifted towards higher temperatures as compared to curve of shrinkage S2; and the layers are subjected to a common temperature treatment at a presintering temperature Ts that is lower than the presintering temperature T1 and at least equal to T3 to cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage S1 is ...

Method of producing a dental prosthetic item, and dental prosthetic item thus produced

A method of producing a dental prosthetic item 3, wherein the dental prosthetic item 3 is attached, via an interior surface 5, to another dental prosthetic item 2 by means of an adhesive 9, and for adhesive 9 there is provided a gap 8 disposed between an interior surface of the dental prosthetic item 3 and the other dental prosthetic item 2, wherein interior surface 5 of the dental prosthetic item is designed to make allowance for the visual properties of adhesive 9. Furthermore, a dental prosthetic item 3 is produced on the above lines and a blank 41 for the production of such a dental prosthetic item 3 and the other dental prosthetic item 2 is disclosed.

Porous, silicate, ceramic body, dental restoration and method for the production thereof

The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.

Composite material and method for the preparation thereof

A composite material with a porous inorganic-nonmetallic matrix and a second material, and a process for its production, are characterized in that the porous inorganic-nonmetallic matrix has a bending strength ≧40 MPa as measured according to ISO 6 872; the second material is an organic material which at least partly fills the pores of the porous matrix; and the composite material has a modulus of elasticity, E, ≧25 GPa as measured according to ISO 10 477.

Methods for manufacturing ceramic parts using microwave sintering

A method for manufacturing ceramic parts with a certain porosity by sintering using microwaves, the materials to be sintered being arranged in a vessel, wherein the microwaves introduce sintering energy into the materials to be sintered via electromagnetic waves in the range of vacuum wavelengths between 5 cm-20 cm in multimode having an electromagnetic power of up to one kilowatt, and besides being built from primary materials for the structure of the vessel, the vessel is built from a secondary material which comprises, in particular, a mixture of or mixed crystals of non-metallic, para-, ferro- or antiferromagnetic materials.

Lithium disilicate glass-ceramic, method for production thereof and use thereof

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallization, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

LITHIUM DISILICATE GLASS-CERAMIC, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

Method for the production of a ceramic molded part

A process for the preparation of a ceramic molded part from a suspension/dispersion with a solids content and a fluid content by depositing solids content at the periphery of a porous self-supporting support that is at least partially immersed in the suspension/dispersion and has the same shape as the molded part to be prepared, but with a reduced size, wherein: the solids content contains oxide-ceramic particles; the porous self-supporting support is detachably connected with a discharge in a zone that is not immersed in the suspension/dispersion; the suspension/dispersion is moved towards the porous self-supporting support by means of a positive pressure difference between a pressure prevailing in the suspension/dispersion and a pressure prevailing in the discharge; wherein the fluid content of the suspension/dispersion enters in the porous self-supporting support with depositing solids content at the periphery of the porous self-supporting support.

PROCESS FOR PRODUCING A NON-DENSE SINTERED CERAMIC MOLDED BODY HAVING AT LEAST TWO LAYERS

A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; 1. A non-dense sintered ceramic molded body having at least two layers , obtainable by a process ,wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer;{'sub': 1', 'S, 'said first powdery material has a presintering temperature Tthat is higher than the presintering temperature Tof said at least second powdery ceramic material;'}{'sub': 1', '2', '1', '2, 'the course of a curve of shrinkage Sof said at least first powdery ceramic material differs from the course of a curve of shrinkage Sof said at least second powdery material, wherein curve of shrinkage Sis shifted towards higher temperatures as compared to curve of shrinkage S; and'}{'sub': S', '1', '3, 'the layers are subjected to a common temperature treatment at a presintering temperature Tthat is lower than the presintering temperature Tand at least equal to Tto cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein'}{'sub': 1', '3', '1', '2', 'S, 'the curve of shrinkage Sis modified by admixing at least one component having a curve of shrinkage Swhich material is compatible with said powdery ceramic material into said first powdery ceramic material, i.e. has a grain size smaller than the first powdery ceramic material, to equalize the curves of shrinkage Sand Sin the region of the presintering temperature T.'}2. The molded body according to claim 1 , wherein said first powdery ceramic material contains yttrium-stabilized zirconia.3. The molded body according to claim 1 , wherein said at least second powdery ceramic material contains colored yttrium-stabilized zirconia.4. The molded body according to claim 1 , wherein said component ...

Sealing of ceramic substances by means of electromagnetic centimetre waves, and receptacle for carrying out the investive method

A method for manufacturing ceramic parts with a certain porosity by sintering using microwaves, the materials to be sintered being arranged in a vessel, wherein the microwaves introduce sintering energy into the materials to be sintered via electromagnetic waves in the range of vacuum wavelengths between 5 cm-20 cm in multimode having an electromagnetic power of up to one kilowatt, and besides being built from primary materials for the structure of the vessel, the vessel is built from a secondary material which comprises, in particular, a mixture of or mixed crystals of non-metallic, para-, ferro- or antiferromagnetic materials.

SUPPLY SYSTEM FOR TOOTH SAMPLES

A supply system for tooth samples for determining brightness, chroma and/or shade of natural and/or bleached teeth, has a plurality of receiving elements (20, 22) in which a plurality of tooth samples (30) are linearly disposed. Groups of tooth samples (30) are provided next to each other in a first receiving element (20), wherein the tooth samples (30) have the same brightness and the same shade within each group. The second receiving element (22) also has groups of tooth samples (30) that are disposed next to each other, wherein tooth samples (30) are disposed having the same brightness and different shades within each group.

Lithium disilicate glass-ceramic, method for production thereof and use thereof

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

PROCESS FOR IMPROVING THE STABILITY OF YTTRIUM STABILISED ZIRCONIA FOR DENTAL RESTORATIONS

A process for improving the stability of yttrium stabilised zirconia for dental restorations comprising yttrium stabilised zirconia, the dental restorations are veneered with a dental ceramic veneering material wherein—the dental restoration comprising yttrium stabilised zirconia and to be veneered is provided;—the dental ceramic veneering material is applied to the dental restoration by an aerosol which contains the dental ceramic veneering material and substantially water-free propellant;—the resulting arrangement is fired to a resulting veneered dental restoration. 18-. (canceled)9. A process for improving the stability of yttrium stabilised zirconia for dental restorations comprising yttrium stabilised zirconia , with the dental restorations being veneered with a dental ceramic veneering material , the process comprisingproviding the dental restoration comprising yttrium stabilised zirconia that is to be veneered;applying the dental ceramic veneering material to the dental restoration by an aerosol which comprises the dental ceramic veneering material and a substantially water-free propellant; andfiring the resulting arrangement, resulting in a veneer for the veneered dental restoration.10. The process of wherein the yttrium stabilised zirconia dental restoration comprises the composition:zirconium dioxide: from about 93 to about 97% by weightyttrium oxide: from about 3 to about 5% by weighthafnium oxide: from about 0 to about 3% by weightaluminium oxide: from about 0 to about 1% by weightsilicon oxide: from about 0 to about 1% by weight11. The process of wherein the dental ceramic veneering material comprises the composition:{'sub': '2', 'SiO: from about 58 to about 70% by weight'}{'sub': 2', '3, 'AlO: from about 10 to about 18% by weight'}{'sub': '2', 'KO: from about 6 to about 12% by weight'}{'sub': '2', 'NaO: from about 3 to about 8% by weight'}{'sub': 2', '3, 'BO: from about 1 to about 6% by weight'}BaO: from about 0 to about 3% by weight{'sub': '2', 'TiO: ...

Molded member made of form-stabilized material and method for the manufacture thereof

Molded member made of form-stabilized material, comprising at least one first component and one second component, characterized in that the second component has a different pigmentation than the first component and the second component is disposed inside the first element, forming a boundary surface, in such a way that the boundary surface represents a spatially curved surface.

DENTAL RESTORATION, METHOD FOR PRODUCTION THEREOF AND GLASS CERAMIC

The invention relates to glass ceramics, which show high strength, high translucency, high chemical stability and which are still mechanically processible. The invention further refers to a method for producing a dental restoration comprising such glass or glass ceramic as well as the dental restoration itself. 1. A method for producing a dental restoration comprising a lithium silicate glass ceramic , whereina) an amorphous glass is subjected to at least one heat treatment with temperatures from 450 to 1100° C. resulting in a translucent and tooth coloured and glass ceramic with a strength of at least 250 MPa (measured according to DIN ISO 6872) and with the colour of tooth, wherein during the at least one heat treatment at least a partial crystallisation occurs due to the increased temperatures, andb) the glass ceramic is formed into a dental restoration for immediate dental application and with a strength of at least 200 MPa (measured according to DIN ISO 6872) by a material removing process.2. The method of claim 1 , wherein the amorphous glass has the following composition:{'sub': '2', '55 to 70 wt-% SiO,'}{'sub': '2', '10 to 25 wt % LiO,'}8 to 20 wt-% of a stabiliser selected from the group consisting of the oxides of Zr, Hf, Ge, La, Y, Ce, Ti, Zn or its mixtures,{'sub': 2', '3, '0 to 10 wt-% AlO,'}{'sub': 2', '2, '0 to 10 wt-% KO and/or NaO,'}{'sub': 2', '5, '0 to 8 wt-% POand'}0 to 20 wt-% additives.3. The method of claim 1 ,wherein the heat treatment is a single-stage treatment with a temperature from 600° C. to 950° C. or the heat treatment is a double-stage treatment with a first temperature from 600 to 800° C. and a second temperature from 780 to 900° C.4. The method of claim 2 ,wherein the additives are selected from the group consisting of nucleating agents, fluorescent agents, dyes, glass colouring oxides, coloured pigments, and mixtures thereof.5. The method of claim 4 ,wherein the nucleating agents are selected from the group consisting of ...

Composite material and method for the preparation thereof

A composite material with a porous inorganic-nonmetallic matrix and a second material, characterized in that said porous inorganic-nonmetallic matrix has a bending strength of ≧40 MPa as measured according to ISO 6 872; said second material is an organic material which at least partly fills the pores of said porous matrix; and said composite material has a modulus of elasticity, E, of ≧25 GPa as measured according to ISO 10 477.

Dental restoration, method for production thereof and glass ceramic

The invention relates to glass ceramics, which show high strength, high translucency, high chemical stability and which are still mechanically processible. The invention further refers to a method for producing a dental restoration comprising such glass or glass ceramic as well as the dental restoration itself.

Lithium disilicate glass-ceramic, method for production thereof and use thereof

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

Lithium silicate glasses or glass ceramics, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (Li 2 O.SiO 2 (Li 2 SiO 3 )), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.

Porous, silicate, ceramic body, dental restoration and method for the production thereof

The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.

MOLDED MEMBER MADE OF FORM-STABILIZED MATERIAL AND METHOD FOR THE MANUFACTURE THEREOF

Molded member made of form-stabilized material, comprising at least one first component and one second component, characterized in that the second component has a different pigmentation than the first component and the second component is disposed inside the first element, forming a boundary surface, in such a way that the boundary surface represents a spatially curved surface. 137-. (canceled)38. A process for preparing a molded member comprising the steps ofa) filling a mold with the at least one first component comprising a pigmentation,b) compressing the at least one first component in the mold to form in the at least one first component a depression having a surface curved in space,c) filling the depression with at least one second component comprising a different pigmentation than the first component, andd) compressing the at least one second component in the depression, such that the surface curved in space forms an interface, curved in space towards the at least one second component, between the at least one first and second components,{'b': 16', '14', '42', '44', '46', '48', '36', '38', '40, 'wherein the interface () is essentially described by a family of parabolas, whereby the second component () has essentially parabolic border lines (, , ), with continuously decreasing maximums (), towards the first component in a cross-sectional plane (, , ), and'}{'b': 48', '14', '52, 'wherein the continuously decreasing maximums () go through at least 50% of the second component () in the taper direction ().'}39. The process according to claim 38 , wherein (i) each of the first and second components further comprises sinterable ceramic material or (ii) each of the first and second components further comprises plastic material claim 38 ,40. The process according to further comprising claim 38 , after the filling and compressing step (c) claim 38 , the step of curing the first and second components at an elevated temperature.41. The process according to further ...

POROUS, SILICATE, CERAMIC BODY, DENTAL RESTORATIONS AND METHOD FOR THE PRODUCTION THEREOF

The present invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa. 115-. (canceled)16. A dental restoration precursor obtained by a process comprising the steps ofpartially sintering a metal-oxide containing green body to obtain a metal-oxide containing porous silicate-ceramic body having a first density and an ISO 6872 three-point bending strength of 25-180 MPa andmilling the porous silicate-ceramic body to a precursor having the dental restoration shape.17. The dental restoration precursor of wherein the silicate-ceramic body has an ISO 6872 coefficient of thermal expansion (CTE) of at least 7×10K.18. The dental restoration precursor of wherein the silicate-ceramic body has an ISO 6872 coefficient of thermal expansion of 7-18×10K.19. The dental restoration precursor of wherein the silicate-ceramic body has an ISO 6872 coefficient of thermal expansion of 12-15×10K.20. The dental restoration precursor of wherein the process further comprises the step of molding the metal-oxide containing green body before the partial sintering step.21. The dental restoration precursor of wherein the molded metal-oxide containing green body has a holding element.22. The dental restoration precursor of wherein the molded metal-oxide containing green body is embedded in a matrix.23. A dental restoration obtained by a process comprising the step of{'claim-ref': {'@idref': 'CLM-00016', 'claim 16'}, 'dense-sintering the dental restoration precursor of to obtain a dental restoration having a second density such that the first-density/second-density ratio is 2/5-98/100.'}24. The dental restoration of wherein the process further ...

LITHIUM DISILICATE GLASS-CERAMIC, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material. 113-. (canceled)14. A lithium silicate glass ceramic that includes at least 10 wt % ZrO , from 55 to 70 wt % SiO , and from 10 to 15 wt % LiOand having a main crystal phase consisting of lithium disilicate crystal.15. Lithium silicate glass ceramic of claim 14 , which is in the form of a dental restoration. This application claims priority to and is a continuation of U.S. application Ser. No. 14/274,235 filed May 9, 2014, which published as US Publication No. 2014/0249016 on Sep. 4, 2014, which is a continuation of U.S. application Ser. No. 13/518,765 filed Aug. 15, 2012, now U.S. Pat. No. 8,956,987, which is the national state entry of PCT/EP10/07918 filed Dec. 23, 2010, which claims priority to DE 10 2009 060 274.4 filed Dec. 23, 2009, all of which are hereby incorporated by reference in their entirety.The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.Lithium disilicate glass-ceramics are well known from the literature and several patents are based on this glass-ceramic system. Thus, for example, self-glazed lithium disilicate glass-ceramic objects for the production of tableware are described in EP-B-536 479, in EP-B-536 572 lithium ...

Lithium disilicate glass-ceramic, method for production thereof and use thereof

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

LITHIUM DISILICATE GLASS-CERAMIC, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material. 1. Lithium silicate glass ceramic , which comprises at least 7.0 wt. % ZrOand which comprises more than 10 vol. % of crystal , wherein said crystal is selected from the group consisting of lithium metasilicate crystal and lithium disilicate crystal.2. Lithium silicate glass ceramic of claim 1 , which is present in the form of a powder claim 1 , a blank or a dental restoration.3. Lithium silicate glass ceramic of claim 1 , which is in the form of an inlay claim 1 , an onlay claim 1 , a bridge claim 1 , a post and core claim 1 , a veneer claim 1 , or a crown.4. A process for preparing a lithium silicate glass ceramic of comprising the steps of:{'sub': 2', '2, '(i) producing a starting glass comprising at least SiOand LiO; and'}(ii) subjecting said starting glass to a first heat treatment at a first temperature to produce a glass ceramic which has lithium metasilicate as the main crystalline phase.5. The process according to further comprising subjecting said glass ceramic to a second heat treatment at a second temperature to produce a glass ceramic which has lithium disilicate as the main crystalline phase.659.-. (canceled) This application claims priority to and is a continuation of U.S. application Ser. No. 13/518,765 filed Aug. 15, 2012, which is the national stage entry of PCT/EP10/07918 filed Dec. 23, 2010, which claims priority to DE 10 2009 060 274.7 filed Dec. 23, 2009, all of which are hereby incorporated by reference in their entirety.The invention relates to glass-ceramics based on the lithium disilicate system which can ...

DENTAL RESTORATION, METHOD FOR ITS PRODUCTION AND INGOT

The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.

PROCESS FOR PRODUCING A NON-DENSE SINTERED CERAMIC MOLDED BODY HAVING AT LEAST TWO LAYERS

A process for producing a non-dense sintered ceramic molded body having at least two layers, wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer; said first powdery material has a presintering temperature Tthat is higher than the presintering temperature Tof said at least second powdery ceramic material; the course of a curve of shrinkage Sof said at least first powdery ceramic material differs from the course of a curve of shrinkage Sof said at least second powdery material, wherein curve of shrinkage Sis shifted towards higher temperatures as compared to curve of shrinkage S; and the layers are subjected to a common temperature treatment at a presintering temperature Tthat is lower than the presintering temperature Tand at least equal to Tto cause sintering that remains in a stage of sintering that has not proceeded to the theoretical density; wherein the curve of shrinkage Sis modified by admixing at least one component having a curve of shrinkage Swhich material is compatible with said powdery ceramic material into said first powdery ceramic material, i. e. has a grain size smaller than the first powdery ceramic material, to equalize the curves of shrinkage Sand Sin the region of the presintering temperature T. 1. A process for producing a non-dense sintered ceramic molded body having at least two layers ,wherein a first powdery ceramic material forming a layer is contacted with at least a second powdery material forming at least a second layer;{'sub': 1', 'S, 'said first powdery material has a presintering temperature Tthat is higher than the presintering temperature Tof said at least second powdery ceramic material;'}{'sub': 1', '2', '1', '2, 'the course of a curve of shrinkage Sof said at least first powdery ceramic material differs from the course of a curve of shrinkage Sof said at least second powdery material, wherein curve of shrinkage Sis shifted towards higher ...

LITHIUM DISILICATE GLASS-CERAMIC, METHOD FOR PRODUCTION THEREOF AND USE THEREOF

The invention relates to glass-ceramics based on the lithium disilicate system which can be mechanically machined easily in an intermediate step of crystallisation and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic. Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material. 113-. (canceled)14. A lithium silicate glass-ceramic comprising:{'sub': '2', 'SiO,'}{'sub': '2', 'LiO,'}{'sub': 2', '2, '10 to 20% by weight of the stabiliser selected from the group consisting of ZrO, HfOand mixtures thereof,'}0 to 10% by weight of additives selected from the group consisting of boron oxide, phosphorus oxide, fluorine, sodium oxide, barium oxide, strontium oxide, magnesium oxide, zinc oxide, calcium oxide, yttrium oxide, titanium oxide, niobium oxide, tantalum oxide, lanthanum oxide and mixtures thereof, and0 to 10% by weight of colourants.15. The lithium silicate glass-ceramic according to claim 14 , further comprising KO claim 14 , AlO claim 14 , POor combinations thereof16. The lithium silicate glass-ceramic according to claim 14 , further comprising 0.1 to 5% by wt of KO and 0.1 to 5% by wt of AlO.17. The lithium silicate glass-ceramic according to claim 14 , further comprising 2 to 5% by wt of PO.18. The lithium silicate glass-ceramic according to claim 14 , wherein SiOis present in an amount of 55 to 70% by wt.19. The lithium silicate glass-ceramic according to claim 14 , wherein the colourants are glass-colouring oxides and/or pigments.20. The lithium silicate glass-ceramic according to claim 19 , wherein the glass-colouring oxides are selected from oxides of iron claim 19 , titanium claim 19 , cerium claim 19 , copper claim 19 , chromium claim 19 , cobalt claim 19 , nickel claim 19 , manganese claim 19 , selenium claim 19 , silver claim 19 , indium claim 19 , gold claim 19 , and rare earth metals.21. The ...

Lithium silicate glasses or glass ceramics, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (Li 2 O.SiO 2 (Li 2 SiO 3 )), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high-strength, highly translucent and chemically stable glass ceramic.

Sealing of ceramic substances by means of electromagnetic centimetre waves, and receptacle for carrying out the inventive method

Grass trimmer

Process for producing a tooth replacement part and a tooth replacement part produced in this way

Verfahren zur Herstellung eines aus einem ersten und mindestens einem weiteren Bauteil (2, 3) zusammengesetzten Zahnersatzteils (1), wobei das erste Bauteil (3) mit einer inneren Oberfläche (5) mittels eines Klebstoffs (9) an dem weiteren Bauteil (2) befestigt wird, wobei für den Klebstoff (9) ein sich zwischen einer inneren Oberfläche des ersten Bauteils (3) und dem weiteren Bauteil (2) befindlicher Spalt (8) vorgesehen wird, dadurch gekennzeichnet, dass die innere Oberfläche (5) des ersten Bauteils (3) unter Berücksichtigung der optischen Eigenschaften des Klebstoffs (9) konstruiert wird. Method for producing a tooth replacement part (1) composed of a first and at least one further component (2, 3), the first component (3) having an inner surface (5) by means of an adhesive (9) on the further component (2) is fastened, a gap (8) located between an inner surface of the first component (3) and the further component (2) being provided for the adhesive, characterized in that the inner surface (5) of the first component (3) taking into account the optical properties of the adhesive (9).

Glass ceramic comprising high proportions of zirconium oxide and method of producing said glass ceramic

The invention relates to glass ceramics having high strength, high translucency, high chemical stability and which are mechanically processible. A method for producing a dental restoration from a lithium silicate glass ceramic is presented. An amorphous glass comprised of 55 to 70 wt-%SiO2, 15 to 25 wt-% LiO2, 8 to 20 wt-% of a stabilizer selected from the group consisting of ZrO2 HfO2 and mixtures thereof, 0 to 10 wt-% Al2O3, 0 to 10 wt-% K2O and/or Na2O, 0 to 8 wt-% P2O5 and 0 to 20 additives is subjected to heat treatment from 450 to 1100 Celsius resulting in a translucent and tooth coloured glass ceramic with at least 250MPa strength. The glass ceramic is then formed to a dental restoration for immediate dental application. A translucent and tooth coloured glass ceramic made by the method and used for dental restoration is also presented.

Sealing of ceramic substances by means of electromagnetic centimetre waves, and receptacle for carrying out the inventive method

The invention relates to a method for producing ceramic parts having a defined porosity by means of sintering using microwaves, substances to be sintered being contained in a receptacle. The inventive method is characterised in that the microwaves apply energy for sintering using electromagnetic waves into substances to be sintered, said electromagnetic waves having a vacuum wavelength range of between 5 cm and 20 cm in the multimode and an electromagnetic power of up to one kilowatt, and in that, the receptacle is produced not only by primary materials, but also by a secondary material consisting of a mixture of non-metallic paramagnetic, ferromagnetic, antiferromagnetic, or ferroelectric materials and refractory, microwave-transparent materials.

Tooth implant with machinable construction

A tooth implant used for a prosthetic supply with an area (I) shaped for permanent insertion into the jawbone and an adjoining connecting area (II) that supports the prosthetic supply. The tooth implant is characterized in that the connecting area (II) has been prepared in advance and consists of at least one ceramic area (3) with a core area (3a) and at least one outer area (4); in that the core area (3a) is at least partially enclosed by the outer area (4); in that the at least one outer area (4) is made of a machinable material for the preparation of a prosthetic supply; in that the ceramic material in the ceramic area (3) is harder than the outer area (4); and in that the material of the outer area (4) has a hardness corresponding to, or less than, that of natural tooth enamel.

Lithium silicate glasses or glass ceramics, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (Li

Lithium disilicate glass ceramics, method for the production thereof and use thereof

The invention relates to glass ceramics on the basis of the lithium disilicate system, which can be easily mechanically machined in an intermediate stage of the crystallization and which represent high-strength, highly translucent and chemically stable glass ceramics after complete crystallization. Furthermore, the invention relates to a method for producing said glass ceramics. The glass ceramics according to the invention are used as dental material.

Dental ceramic restoration with a multilayer structure

Lithium disilicate glass-ceramic, method for the production thereof and use thereof

The invention relates to glass ceramics on the basis of the lithium disilicate system, which can be easily mechanically machined in an intermediate stage of the crystallization and which represent high-strength, highly translucent and chemically stable glass ceramics after complete crystallization. Furthermore, the invention relates to a method for producing said glass ceramics. The glass ceramics according to the invention are used as dental material.

Lithium silicate glasses or glass ceramics, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (Li2O SiO2 (Li2SiO3) ), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high- strength, highly translucent and chemically stable glass ceramic.

Lithium disilicate glass ceramics, method for the production thereof and use thereof

Provisioning system for dental models

Porous, silicate, ceramic body, dental restoration and method for the production thereof

The invention relates to a porous, silicate, ceramic body, possibly with different colors, with a first density, which can be sintered into a silicate, ceramic body with a second density, wherein the ratio of the first density to the second density is 2/5 to 98/100, and the three-point bending strength of the porous, silicate ceramic body with a first density, measured according to ISO 6872, amounts to 25 to 180 MPa.

Lithium silicate glasses or glass ceramics, method for production thereof and use thereof

The invention relates to glass ceramics based on the lithium metasilicate system (Li2O SiO2 (Li2SiO3) ), which are mechanically processible in a simple manner in an intermediate stage of the crystallization and, after complete crystallization, represent a high- strength, highly translucent and chemically stable glass ceramic.

Consolidating of ceramic substances by means of electromagnetic centimetre waves, and receptacle for carrying out the inventive method

Method of manufacturing a color picture tube having coatings of organic and inorganic constituents

Abstract of the Disclosure In 2 color-picture tube, the conductive coating on the inside of the cone is a suspension without organic constituents. The conductive coating on the inside of the neck, which is contiguous to the conductive coating on the inside of the cone, consists of the aforementioned suspension with an addition of organic constituents. A sharp and scratch-resistant boundary between the conductive coating in the neck and the uncoated area of the neck is thus obtained.

Densification of ceramic materials using electromagnetic super high frequency waves, as well as vessel for performing the method

Method for manufacturing ceramic parts with a certain porosity by sintering using microwaves, the materials to be sintered being arranged in a vessel, characterized in that - the microwaves introduce sintering energy into the materials to be sintered via electromagnetic waves in the range of vacuum wavelengths between 5 cm - 20 cm in multimode having an electromagnetic power of up to one kilowatt, and - besides being built from primary materials for the structure of the vessel, the vessel is built from a secondary material which comprises, in particular, a mixture of or mixed crystals of non-metallic, para-, ferro- or antiferromagnetic materials.

Dental restoration, method for its production and ingot

The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.

Method for production of a tooth replacement piece tooth replacement piece and corresponding component and blank

The invention relates to the production of a tooth replacement piece (1), whereby the tooth replacement piece (1) comprises an at least one-piece skeleton (2) as first component, the skeleton has an outer surface (6) to be faced and the facing is carried out with a separately produced facing piece (3) as a further component with a joint surface (5) optionally generated with interposing of further components (3') for application to the outer surface (6) of the skeleton (2) subsequently fixed to the skeleton (2). Furthermore, a tooth replacement piece (1) produced as above, a component (3) for said tooth replacement piece and a blank (41) for production of such a tooth replacement piece (1) are disclosed.

Lithium disilicate glass-ceramic, method for production thereof and use thereof

The invention relates to glass-ceramics based on the lithium silicate system which can be mechanically machined easily in an intermediate step of crystallization and, after complete crystallisation, represent a very strong, highly-translucent and chemically-stable glass-ceramic Likewise, the invention relates to a method for the production of these glass-ceramics. The glass-ceramics according to the invention are used as dental material.

Porous, silicate, ceramic body, dental restoration and method for the production thereof

Extrusion device

The invention relates to an extrusion device, specially for producing a foamed polymer, comprising at least one endless screw (2) for conveying at least one polymer which is fed by a feeding device (3), a feeding device (4) for providing a foaming agent once the polymer has melted, a mixing device (5) for mixing the polymer melt and the foaming agent, a throttle (6) for reducing pressure in the supplied polymer/foaming agent mixture, and an extrusion tool (7). In order to simplify overall design of the inventive device and to reduce its production cost, while guaranteeing increased flexibility with regard to various process requirements and/or assembly and reconstruction requirements, the endless screw (2) and the feeding device (3) are arranged in an extruder and the feeding device (4), mixing device (5), throttle (6) and extrusion tool (7) are configured as individual units (10) which can be connected to the extruder outfeed.

Composite material and method of making it

A composite material (I) comprises: <??>(A) a porous inorganic nonmetallic matrix having a flexural strength of at least 40 MPa (ISO 6872); and <??>(B) a second material comprising an organic material that at least partially fill the pores of the matrix whereby the composite (I) has a modulus of elasticity, E, of at least 25 GPa (ISO 10477). <??>Independent claims are included for: <??>(i) a process for the production of the composite (I) by preparation of the inorganic starting material, preferably in powder form; sintering of the material such that the sintering process is ended prior to formation of closed pores in the sinter product and the phase of necking and/or glass flux is reached; treatment of the matrix with a coupling agent; infiltration of the resulting porous and surface treated matrix with the organic material; and solidification of the organic material; <??>(ii) the porous inorganic nonmetallic matrix (A); <??>(iii) a process for the production of the matrix (A) by mixing an inorganic nonmetallic material with a removable binder to form a moldable material; removal of the binder to yield a porous inorganic nonmetallic structure; sintering of the structure ot form the porous matrix (A); <??>(iv) a mixture of powdered inorganic nonmetallic substances having a particle size (d50) of 0.2-25 mu m and containing 2-50 wt.% removable binder; <??>(v) a molded article of porous sintered natural and/or synthetic feldspar or feldspar-like material having a porosity of 5-85 (15-35) vol.%; <??>(vi) a multilayer molded article having layers with different properties in the layers prepared by construction of the article by means of hardening individual layers and application of new layers with different starting materials having different physical-technical properties.

Dental restoration, method for its production and ingot

The invention refers to a method for producing a dental restoration comprising a lithium silicate glass or glass ceramic as well as a dental restoration inself. The invention further refers to a ingot with the same composition having a defined strength.

Verdichtung keramischer werkstoffe mit hilfe von elektromagnetischen zentimeterwellen sowie gefäss zur durchführung des verfahrens

Verfahren zur herstellung eines keramischen formteils

Verbundwerkstoff und verfahren zu seiner herstellung

Material sinterizado que comprende circonia estabilizada, alúmina y plaquetas de aluminato de tierras raras, método de fabricación y usos

Un producto sinterizado de cerámica obtenido por sinterización de un material que comprende: a) de 98-50% en volumen de circonia como una matriz, i) estabilizada con una composición de estabilización que tiene ii) de desde 2 a 3 por ciento en moles de itria y de desde 10 a 15 por ciento en moles de ceria; en laque el término porcentaje en moles se relaciona con la matriz de circonia y b) de 2 a 50% en volumen de alúmina; en el que 5 a 90% en volumen de alúmina está en la forma de plaquetas hexagonales de fórmula general REAI11O18por reacción de partículas de alúmina globular distribuidas de manera homogénea incorporadas en la matriz decirconia con el óxido de tierras raras formador de plaquetas durante el procedimiento de sinterización y en el que REsignifica metal de tierras raras y dichas plaquetas hexagonales contienen óxido de lantano,con una resistencia mecánica de >= 800 MPa cuando se mide según DIN EN ISO 6872 y con una tenacidad a lafractura de >= 6 MPa.m1/2 cuando se mide según Din CEN/TS 14425-5 y con un módulo de elasticidad de <= 250 GPacuando se mide según DIN EN 843 Parte 2.

Bereitstellungssystem für zahnmuster

Composite material and method for the production thereof

Process for producing a non-dense sintered ceramic molded body having at least two layers

Verwendung einer ferngesteuerten drohne

Material sinterizado que comprende circonia estabilizada, alúmina y laminillas de aluminatos de tierras raras, método de fabricación y usos

Un material sinterizado que comprende: de 98 a 50% en volumen de circonia como matriz, que está estabilizada con i) cualquier cantidad de 2 a 3 por ciento molar de itria; ii) o de 10 a 15 por ciento molar de ceria; iii) o una mixtura de ceria e itria en el intervalo de cantidades dado en i) y ii) en donde no se sobrepasan unaestabilización máxima de 3 por ciento molar relativo a itria pura y 15 por ciento molar relativo a ceria purarespectivamente, no estando abarcados 3 por ciento molar de itria y 15 por ciento molar de ceria, y en dondeel término porcentaje molar se refiere a la matriz de circonia y en donde la matriz de circonia puede obtenersea partir de a) un polvo de partículas de circonia que tienen un tamaño medio de partícula de<=μb) las partículas están recubiertas con los óxidos estabilizadores itria y/o ceria para estabilización de lacirconia, c) se realiza una estabilización de la fase tetragonal por una reacción de difusión por el proceso de sinterización,y de 2 a 50% en volumen de alúmina, de la cual 5 a 90% en volumen se encuentra en forma de laminillas hexagonalesde fórmula general LaAl11O18 que se forman por sinterización a temperaturas inferiores a 1500ºC.

Ferngesteuerte drohne und deren verwendung

Die Erfindung betrifft eine ferngesteuerte Drohne zum Erfassen und Vermessen von Produkten 200 in einem Materiallager 300 aus der Luft. Die Drohne 100 weist eine Kamera 110 auf zum Erstellen von Luftbildaufnahmen von den Produkten beim Überfliegen des Materiallagers, wobei die Luftbildaufnahmen insbesondere im Hinblick auf die äußere Geometrie der Produkte 200 auswertbar sind. Um darüber hinaus weitere Informationen über die Produkte mit Hilfe der Drohne gewinnen zu können und auch deren Einsatzgebiet zu erweitern, sieht die erfindungsgemäße ferngesteuerte Drohne vor, dass die Kamera ausgebildet ist, die Luftbildaufnahmen so zu erstellen, dass sie - alternativ oder zusätzlich zu der äußeren Geometrie der Produkte - auch im Hinblick auf die OberflächenBeschaffenheit, die Oberflächentemperatur und/oder die Position der Produkte 200 in dem Materiallager auswertbar sind.

Fully ceramic tooth replacement with a frame made of cer-stabilised zircon oxide

Ferngesteuerte Drohne und deren Verwendung

Die Erfindung betrifft eine ferngesteuerte Drohne zum Erfassen und Vermessen von Produkten 200 in einem Materiallager 300 aus der Luft. Die Drohne 100 weist eine Kamera 110 auf zum Erstellen von Luftbildaufnahmen von den Produkten beim Überfliegen des Materiallagers, wobei die Luftbildaufnahmen insbesondere im Hinblick auf die äußere Geometrie der Produkte 200 auswertbar sind. Um darüber hinaus weitere Informationen über die Produkte mit Hilfe der Drohne gewinnen zu können und auch deren Einsatzgebiet zu erweitern, sieht die erfindungsgemäße ferngesteuerte Drohne vor, dass die Kamera ausgebildet ist, die Luftbildaufnahmen so zu erstellen, dass sie - alternativ oder zusätzlich zu der äußeren Geometrie der Produkte - auch im Hinblick auf die Oberflächen-Beschaffenheit, die Oberflächentemperatur und/oder die Position der Produkte 200 in dem Materiallager auswertbar sind.

Vollkeramischer Zahnersatz mit einem Gerüst aus einem cer-stabillisierten Zirkonoxid

Vollkeramischer Zahnersatz mit einem Gerüst, das aus einem Gerüstmaterial aus einem Cer-stabiliserten Zirkonoxid (Ce-ZrO¶2¶) mit einem Anteil von bis zu 25 Gew.-% Aluminiumoxid (Al¶2¶O¶3¶) bezogen auf den Anteil an ZrO¶2¶ aufgebaut ist und einem Infiltrationsglasanteil im Gerüst von 0-40 Vol.-% bezogen auf das Volumen des Gerüsts sowie einer auf das Gerüstmaterial abgestimmten Verblendkeramik. DOLLAR A Die Erfindung betrifft die Verwendung von Cer-stabilisiertem ZrO¶2¶ zur Herstellung von Gerüstmaterialien, die als Restauration im Dentalbereich einsetzbar sind.