Optical-excitation fluorescent powder and preparation method thereof

The invention relates to optical-excitation fluorescent powder and a preparation method thereof, belonging to the technical field of rear-earth luminescent materials. Optical-excitation fluorescent powder is sosoloid with a general formula of alpha-Sr[2-x-y]SiO4:xEu<2+>, yTm<3+> (x is not less than 0.01 and not greater than 0.03, and y is not less than 0.01 and not greater than 0.03). The preparation method comprises the following steps of mixing and batching SrCO3, SiO2, Eu2O3 and Tm2O3 according to a general formula proportion of the finally prepared fluorescent powder, and adding alcohol to grind, so that the materials are uniformly mixed; sintering the uniformly mixed materials for 3 hours-5 hours under a reducing atmosphere at a temperature of 1100 DEG C-1300 DEG C, cooling to the room temperature under a reducing atmosphere, and grinding to obtain the optical-excitation fluorescent powder alpha-Sr[2-x-y]SiO4:xEu<2+>, yTm<3+>. The luminescent material disclosed by the invention can ...

Method for regulating upconversion emitting color of rare earth illuminant

Nano-calcium phosphate biological active ceramic material containing silicon dioxide and preparation method thereof

The invention provides a nanometer calcium phosphate bioactive ceramic material containing silicon dioxide and a method for preparing the same. The method for preparing the nanometer calcium phosphate bioactive ceramic material containing the silicon dioxide comprises the following steps: firstly, synthesizing an aqueous dispersion liquid of nanometer calcium phosphate by a liquid phase method; secondly, catalyzing and hydrolyzing ortho silicate ester compounds in the aqueous dispersion liquid, and performing gelatination to generate the silicon dioxide coating on the surface of the nanometer calcium phosphate; and thirdly, performing drying and high temperature calcination to obtain the nanometer calcium phosphate bioactive ceramic material containing the silicon dioxide. The direct agglomeration in the nanometer calcium phosphate is avoided in the process of drying and calcining after the surfaces of nanometer calcium phosphate particles are coated with the silicon dioxide, thus the original ...

Molybdenum oxide/bismuth oxybromide composite photocatalyst and preparation method thereof

The invention discloses a molybdenum oxide/bismuth oxybromide composite photocatalyst and a preparation method thereof, and the preparation method is characterized by comprising the following steps: dissolving a bismuth source and a rare earth ion source in a mannitol solvent, uniformly stirring and mixing, adding an aqueous solution containing a bromine source, carrying out a hydrothermal reaction on the obtained aqueous solution, centrifuging, washing, and drying to prepare a BiOBr: RE precursor; and adjusting the ratio of BiOBr: RE to a molybdenum source, fully grinding and stirring, and annealing to obtain the MoO3-x/BiOBr: RE composite photocatalyst. The photocatalyst has an excellent catalytic degradation effect on antibiotics and organic dye pollutants, and has the advantages of high photon-generated carrier separation efficiency, effective utilization of near-infrared light and high catalytic efficiency; the material is low in preparation difficulty, mild in reaction condition, ...

Ce-doped W18O49 photocatalytic material as well as preparation method and application thereof

The invention provides a Ce < 4 + >-doped W18O49 photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. The Ce < 4 + > doped W18O49 photocatalytic material provided by the invention comprises W18O49 and Ce < 4 + > for replacing part of W element in the W18O49. W18O49 is a semiconductor defect tungsten oxide with a local surface plasma resonance effect, and low-valence Ce ions replace high-valence W ions (+ 5 valence and + 6 valence), so that the W18O49 generates more oxygen vacancies, water adsorption is facilitated, the photocatalytic decomposition capability of the W18O49 to water is greatly enhanced, and high-efficiency hydrogen production through water decomposition can be realized. The result of the embodiment shows that the H2 yield of the Ce < 4 + > doped W18O49 photocatalytic material disclosed by the invention can reach 35.249 to 45.699 mmolg <-1 > within four hours under full spectrum irradiation.

Bismuth-doped silicon-aluminum-calcium optical glass and preparation method thereof

The invention relates to a bismuth-doped silicon-aluminum-calcium-based optical glass and a preparation method thereof. The invention is characterized in that the glass is prepared from the following raw materials in percentage by mol: 39.9-64.9 of SiO, 25-40 of Al2O3, 10-40 of CaO and 0.1-10 of Bi2O3.The glass can acquire stronger near-infrared ultra-wide-band fluorescence under the action of laser pumping; compared with the quartz glass, the optical glass has obviously-lowered fusing temperature; the optical glass does not need to be subject to sitallization processing, and has better mechanical strength and higher aluminum oxide content; and the bismuth oxide can be doped at high concentration. Therefore, the optical glass has the ultra-wide-band optical property for covering the overall communication wave band, and is hopeful to be applied to the technical fields of an ultra-wide-band optical amplifier, a high-power laser, a tunable laser and the like.

Bismuth doped phosphosilicate glass and method of producing the same

The invention provides bismuth doped phosphorus silicate zinc acid-based optical glass and a preparation method thereof. The bismuth doped phosphorus silicate zinc acid-based optical glass is characterized in that: the bismuth doped phosphorus silicate zinc acid-based optical glass comprises the following glass substrates in mol percentage: 80 to 65 mol percent of ZnO, 5 to 45 percent of P2O5, 10 to 35 mol percent of SiO2, 0 to 10 mol percent of RO and 0.1 to 5 mol percent of Bi2O3, wherein RO is one of magnesia, calcium oxide, strontia and baryta. Compared with the quartz glass, the glass has an obviously reduced fusion temperature, and has an ultra-broadband optical property covering 1,000 to 1,600 nm communication wavebands. The glass is expected to be applied in the technical fields of ultra-broadband optical amplifiers, high-power lasers, tunable lasers, and the like.

Bismuth doped phosphosilicate glass and method of producing the same

The present invention provides bismuth doped phosphorus silicate zinc acid-based optical glass and a preparation method thereof. The bismuth doped phosphorus silicate zinc acid-based optical glass is characterized in that: the bismuth doped phosphorus silicate zinc acid-based optical glass comprises the following glass substrates in mol percentage: 80 to 65 mol percent of ZnO, 5 to 45 percent of P2O5, 10 to 35 mol percent of SiO2, 0 to 10 mol percent of RO and 0.1 to 5 mol percent of Bi2O3, wherein RO is one of magnesia, calcium oxide, strontia and baryta. Compared with the quartz glass, the glass has an obviously reduced fusion temperature, and has an ultra-broadband optical property covering 1,000 to 1,600 nm communication wavebands. The glass is expected to be applied in the technical fields of ultra-broadband optical amplifiers, high-power lasers, tunable lasers, and the like.

X-ray scintillator material and preparation method thereof

The invention discloses an X-ray scintillator material and a preparation method thereof, and belongs to the technical field of photoelectric functional materials. According to the X-ray scintillator material, Pb < 2 + > metal ions are used as structural sites, linear dicarboxylic acid organic ligands are used as bond-connected three-dimensional ordered topological structures, and the X-ray scintillator material presents visible light under X-ray excitation. According to the X-ray scintillator material, isolated Pb ions in the material structure serve as a luminescence center, the Pb ions absorb X-rays and convert the X-rays into visible light, and organic ligands in the scintillator material structure play a role in stabilizing a metal frame structure; the material has higher mechanical properties, has better adaptability when being used as a film or a coating material, and makes up for the condition of poor stability of the existing X-ray scintillator material.

Preparation method of rare earth ion doped layered double perovskite fluorescent material

The invention discloses a preparation method of a rare earth ion doped layered double-perovskite fluorescent material. The preparation method comprises the following steps: mixing raw materials, putting the mixture into a beaker, dropwise adding deionized water, stirring by a magnetic stirrer, then heating and stirring, grinding the stirred and dried product into powder, putting the powder into a heating furnace, heating, preserving heat, and cooling to room temperature, thereby obtaining the rare earth ion doped layered double-perovskite fluorescent material. The preparation method has the advantages of cheap and easily available raw materials, environmental friendliness, lower reaction temperature, energy conservation, good material crystallinity, good stability and ultrahigh near-infrared fluorescence quantum yield close to 100%, the near-infrared luminescence range covers near-infrared first and second regions, and the preparation method is suitable for industrial production and has ...

Mo-doped W18O49 photocatalytic material as well as preparation method and application thereof

The invention provides a Mo-doped W18O49 photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. The Mo doped W18O49 photocatalytic material provided by the invention is formed by gathering W18O49 nanowires, and a part of W element in the W18O49 nanowires is replaced by Mo element. W18O49 is semiconductor defect tungsten oxide with a local surface plasma resonance effect, the light absorption range can be expanded to a near-infrared region, full-spectrum response is achieved, sunlight utilization of W18O49 is greatly enhanced, and photocatalytic reduction of CO2 can be achieved; and the doping of Mo increases the oxygen vacancy on the surface of W18O49, so that the adsorption energy of the Mo-doped W18O49 photocatalytic material to CO2 is increased, the adsorption energy of CO is reduced, and an intermediate (COOH *) for generating CO from CO2 in the reaction process is more stable, thereby improving the selectivity ...

Rare earth doping transparent halogenide glass for information three-dimensional optical storage

The invention provides a rare earth-doped transparent halide glass for information three-dimensional optical storage characterized in that the mol percentage composition of the glass is as follows: AlF3 25-40%, MgF2 5-63%, MX2 1-15%, YF3 10-20%, ReF3 0.1-1%, wherein M is one or more selected from the divalent alkaline earth ions Mg<2+>, Ba<2+> and Sr<2+>, X is one or two selected from Br<-> and Cl<->, Re is selected one or two from the trivalent rare earth ions Sm<3+>, Tb<3+>, Eu<3+> and Ce<3+>. The energy threshold of the rare ion Re through the action of femto-second laser is below 10nJ in the rare earth-doped transparent halide glass of the invention, which is more useful for information writing by femto-second laser, while the rare earth ion in the halide phase separation has better luminescence intensity because of the change of the coordination field.

Preparation method and application of high-transparency lead-based perovskite microcrystalline glass

The invention relates to a preparation method and application of high-transparency lead-based perovskite microcrystalline glass, and belongs to the technical field of solar power generation. The preparation method comprises the following steps: grinding and uniformly mixing high-purity SrCO3, SiO2, B2O3, Cs2CO3, PbBr2, ZnO, NaBr and Tb7O4 to obtain mixed powder; melting the mixed powder at a high temperature of 1100-1200 DEG C in an air atmosphere for 10-15 minutes to obtain a melt, pouring the melt onto a preheated copper plate, and cooling and forming to obtain precursor glass; the precursor glass is sequentially subjected to high-temperature destressing treatment and high-temperature heat treatment to obtain the high-transparency CsPbBr3: Tb < 3 + > microcrystalline glass, and the visible light transmittance is not lower than 89%. The CsPbBr3: Tb < 3 + > microcrystalline glass has excellent luminescence performance under ultraviolet excitation, has an obvious optical waveguide phenomenon ...

Bismuth doped strontium-aluminum-boron based optical glass and preparation thereof

The invention provides bismuth doped Si-Al-B based optical glass and a preparation method thereof. The optical glass is characterized by comprising the following glass matrixes based on molar percentage: 44 to 55 percent of strontium oxide, 20 to 29 percent of aluminum oxide, 20 to 29 percent of diboron trioxide, 0.1 to 5 percent of dibismuth trioxide, and 0.5 to 1 percent of silicon dioxide or lithium carbonate which is added into the glass matrixes as a fusion aid. The fusion temperature of the glass is obviously reduced compared with quartz glass; and the glass has optical performance covering an ultra-wide band of a communication waveband between 1,000 and 1,600nm , and is expected to be applied in the technical fields of an ultra-wide band optical amplifier, a high power laser, a tunable laser and the like.

Rare earth doping metal halogenide photostimulable phosphor phase separation glass and preparation thereof

The invention provides a rare earth-doped metal halide photostimulated luminescence phase separation glass and a method for preparing the same characterized in that the mol percentage composition of the glass is as follows: AlF3 25-40%, BaF2 5-63%, BaCl2 1-15%, BaBr2 1-15%, YF3 10-20%, EuF3 0.1-1%. The rare earth-doped metal halide photostimulated luminescence phase separation glass is obtained by melting for 10-45 minutes in a high-frequency current furnace under the chlorine or inert atmosphere protection at 800-1000 DEG C and heat-treating for 0.5-4 hours around the phase separation temperature after cooling. The method of the invention solves the problem that the powder morphology is not easy to control during the agglomeration and milling processes of photostimulated luminescence powder synthesis using solid phase method and liquid phase method, simplifies the preparation steps of the radiation image storage materials of photostimulated liminescence glass, while eliminates the external ...

Preparation method of fluorescent material used for orange-yellow-color LED

The invention discloses a preparation method of a fluorescent material used for an orange-yellow-color LED and belongs to the technical field of rare earth luminescent material. The fluorescent material used for the orange-yellow-color LED is a solid solution and a chemical formula of the fluorescent material is Sr3SiO5:Eu<2+>. The preparation method comprises following steps: (1) uniformly mixing raw materials including SrCO3, SiO2, Eu2O3 and NH4F; (2) performing a piece-pressing process to the uniformly mixed raw materials through a powder piece-pressing process to obtain a piece-pressed mixed material; and (3) finally placing the piece-pressed mixed material in a crucible, performing a sintering process under a reductive atmosphere at 1250-1350 DEG C for 3-5h, cooling the sintered material to room temperature under the reductive atmosphere, and performing a grinding process to obtain an Sr3SiO5:Eu<2+> single phase. The method is low in cost and simple in processes. By means of the preparation ...

Spinel-type fluorescent powder with broadband near-infrared two-region emission and preparation and application of spinel-type fluorescent powder

The invention discloses a broadband near-infrared two-region emission spinel type fluorescent powder, which has a chemical formula of Zn < 1-x > Mg < x > Al < 2-y > O < 4 >: yNi (x is equal to 0-1, and y is equal to 0.01-0.06), the preparation method comprises the following steps: weighing the raw materials ZnO, MgO, Al2O3 and NiO powder according to the atomic ratio, uniformly mixing in an agate mortar, putting into a corundum crucible, putting into a high-temperature box-type furnace, preserving heat at 1200 DEG C for 3 hours, and cooling the fluorescent powder and the crucible along with the furnace; and packaging the fluorescent powder on the LED chip by using an organic binder. A high-temperature solid-phase method is used for synthesis, and the raw materials can form the spinel-structure fluorescent powder; under the irradiation of 360-370nm near ultraviolet light, broadband fluorescence emission with the near-luminescence center located in the second infrared region and the full ...

Organic-inorganic compound bone restoration bioactive material

The invention provides an organic-inorganic composite bone repair bioactive material, which is synthesized by using nanometer hydroxyapatite of which the surface is coated with silicon dioxide as an inorganic component, using a biodegradable water-soluble polymer material as an organic component, and according to the mass ratio of the organic component to the inorganic component being equal to between 10 to 1 and 1 to 9. The composite bone repair bioactive material using the nanometer hydroxyapatite of which the surface layer is coated with the silicon dioxide as the inorganic component has better biological reactivity compared with the composite bone repair material using a single nanometer hydroxyapatite as the inorganic component, and overcomes the problems that the prior composite bone repair material using a silicon-doped modified hydroxyapatite as the inorganic component has low biological activity and poor interface reactivity cased by the defects of serious agglomeration and the ...

Rare earth-doped oxyfluoride germanate microcrystalline glass and preparation method thereof

The invention discloses rare earth-doped oxyfluoride germanate microcrystalline glass and a preparation method thereof, and belongs to the technical field of luminescent materials. The microcrystalline glass comprises the following components in percentage by mole: 39-55% of GeO2, 5-15% of ZnO, 5-15% of AlF3, 10-25% of BaF2, 1-10% of Na2O, 1-20% of NaF and 0.5-5% of RF2 (R is rare earth elements). The preparation method comprises the following steps: firstly preparing oxyfluoride germanate glass by using a melt quenching method; and then, carrying out micro-crystallization on matrix glass by virtue of a thermal treatment process to obtain transparent oxyfluoride germanate microcrystalline glass, wherein the prepared oxyfluoride germanate microcrystalline glass has good transmission of light in a range from near-infrared rays to visible light, and the up-conversion luminescence of rare earth ions is remarkably enhanced. The prepared rare earth-doped oxyfluoride germanate microcrystalline ...

Red luminescent glass material and preparation method thereof

The invention discloses a red luminescent glass material and a preparation method thereof. The invention relates to the technical field of rare earth luminescent materials. The red luminescent glass material is prepared with raw materials of Na2O, CaO, GeO2, SiO2, and rare earth compounds. The preparation method comprises the following steps: the components are mixed and molten, such that molten glass is obtained; the molten glass is clarified, and is cast into a mold, such that glass is obtained; the glass is rapidly placed into a muffle furnace that is already heated to a glass transition temperature of the glass, and the temperature is maintained; and the temperature is reduced to room temperature. The material can be excited by near-ultraviolet and blue rays, and can emit bright deep red fluorescence. The material has certain potential to be used in ultraviolet chip LED in current market, and can form white-light LED with other green and blue fluorescent powder. The material can also ...

Method for preparing rare earth doped transparent halide glass host material

The invention provides rare earth doped transparent halide glass used for three-dimensional optical data storage and a preparation method thereof. The invention is characterized in that the glass comprises the following compositions in mol percentage: 25 to 40 percent of AlF3, 5 to 65 percent of MF2, 1 to 15 percent of MX2, 10 to 20 percent of YF3, and 0.1 to 1 percent of ReF3, wherein, M represents one or a plurality of divalent alkaline earth ions of Mg<2+>, Ba<2+> and Sr<2+>; X is one or two kinds of ions of Br<-> and Cl <->; and Re is one or a plurality of trivalent rare earth ions of Sm<3+>, Tb<3+>, Eu<3+> and Ce<3+>. The transparent halide glass can be prepared after the compositions are melted in a high-frequency electric furnace for 10 to 45 minutes at a temperature of between 800 and 1,000 DEG C and are cooled under an atmosphere protection of chlorine or inert gas. The rare earth doped transparent halide glass reduces the threshold value of rare earth ion valence variation energy ...

Preparation method of trivalent chromium ion doped broadband near-infrared fluorescent material

The invention discloses a preparation method of a trivalent chromium ion doped broadband near-infrared fluorescent material, which is characterized by comprising the following steps: firstly, putting weighed CsX, NaX, ScX3. 6H2O and CrX3 into an agate mortar, dropwise adding deionized water, grinding until moisture is completely volatilized to generate white powder, transferring into a drying oven at 70 DEG C, preserving heat for 20 minutes, taking out, and drying to obtain the trivalent chromium ion doped broadband near-infrared fluorescent material. And grinding the white block into powder, transferring the powder into a 10ml reaction kettle container, sealing the container in a steel high-pressure kettle, putting the steel high-pressure kettle in an electrothermal blowing drying box, heating, preserving heat, and cooling to room temperature to obtain the product. An improved solid phase method is adopted, the prepared fluorescent material is good in crystallinity and stability and has ...

Bismuth doped ZBS glass and method of producing the same

The invention provides a bismuth doped silicate zinc boron based optical glass and a preparation method thereof. The bismuth doped silicate zinc boron based optical glass is characterized in that: the bismuth doped silicate zinc boron based optical glass comprises the following glass substrates in mol percentage: 10 to 20 percent of silica, 15 to 25 percent of boron trioxide, 55 to 65 percent of zinc carbonate or zinc oxide, and 0.1 to 5 percent of bismuth trioxide. Compared with the quartz glass, the glass has an obviously reduced fusion temperature, and has an ultra-broadband optical property covering 1,000 to 1,600 nm communication wavebands. The glass is expected to be applied in the technical fields of ultra-broadband optical amplifiers, high-power lasers, tunable lasers, and the like.

Preparation of rare earth doping transparent halogenide phase separation glass

The invention provides a method for preparing a rare earth-doped transparent halide phase separation glass characterized in that the mol percentage composition of the glass is as follows: AlF3 25-40%, MgF2 5-63%, MX2 1-15%, YF3 10-20%, ReF3 0.1-1%, wherein M is one or more selected from the divalent alkaline earth ions Mg<2+>, Ba<2+> and Sr<2+>, X is one or two selected from Br<-> and Cl<->, Re is one or two selected from the trivalent rare earth ions Sm<3+>, Tb<3+>, Eu<3+> or Ce<3+>. The rare earth-doped transparent halide phase separation glass is obtained by melting for 10-45 minutes in a high-frequency furnace under the chlorine or inert atmosphere protection at 800-1000 DEG C and heat-treating for 0.5-5 hours around the phase separation temperature after cooling. The threshold of the rare earth ionic valence energy change is reduced under the action of femto-second laser in the glass medium, which is more useful for information writing by femto-second laser and has better luminescence ...

Chiral bismuth oxyhalide two-dimensional material containing ytterbium and erbium ions and silver and preparation method of chiral bismuth oxyhalide two-dimensional material

The invention discloses a chiral bismuth oxyhalide two-dimensional material containing ytterbium and erbium ions and silver, the expression of the chiral bismuth oxyhalide two-dimensional material is BiYbErOX-Ag-Y, X is Cl or Br, and Y is D-sorbitol. A preparation method of the chiral bismuth oxyhalide two-dimensional material comprises the following steps: dissolving ytterbium oxide and erbium oxide in concentrated nitric acid, dissolving all the raw materials in an organic solvent, uniformly stirring, and adjusting the pH value; heating in a hydrothermal kettle and then preserving heat; and washing, drying and carrying out heat treatment. The material provided by the invention is an inorganic nonmetal semiconductor and information function material, has good photoresponse characteristics, higher chiral light modulation efficiency and higher CD value than a natural material, can be used as a novel nano material for scientific research in the fields of catalysis, luminescence and the like ...

Preparation method of perovskite fluorescent material with adjustable luminous efficiency

The invention discloses a preparation method of a perovskite fluorescent material with adjustable luminous efficiency, which comprises the following steps: placing raw materials CdX2, MnX2 and BiX3 in a 20ml glass bottle, adding concentrated hydrochloric acid, magnetically stirring to be transparent, adding CsX, immediately reacting to generate precipitate, continuously stirring, washing with absolute ethyl alcohol, and drying to obtain the perovskite fluorescent material. The low-dimensional metal halide perovskite disclosed by the invention not only has good crystallinity and light, heat and humidity stability, but also can regulate and control the luminescence property through element substitution; an improved room-temperature supersaturation recrystallization method is adopted, the experimental process is simple, heat treatment conditions are not needed, and the raw material cost is low; the low-dimensional metal halide perovskite disclosed by the invention can be matched with a commercial ...

Rare earth doped glass frequency conversion luminous material and preparation method thereof

The invention discloses a rare earth doped glass frequency conversion luminous material and a preparation method thereof. The luminous material is formed by fluoride glass ceramics containing rare earth ions and silver nanoparticles. The preparation method comprises the steps of firstly preparing glass containing rare earth ions, secondly preparing the glass into the glass ceramics containing fluoride crystals through the heat treatment technology, and thirdly soaking the glass ceramics in a mixed salt melt containing silver nitrate to undergo ion exchange, thus obtaining the rare earth doped frequency conversion luminous material jointly enhanced by the silver nanoparticles and fluoride microcrystals. The obtained luminous material has the beneficial effects that the luminous material has good optical property and thermal stability; through irradiation of exciting light, by utilizing the local field enhancement effect of the silver nanoparticles, the rare earth ions in a low phonon energy ...

Calcium phosphate biological active ceramic material containing silicon dioxide and preparation method thereof

The invention provides a calcium phosphate bioactive ceramic material containing silicon dioxide and a method for preparing the same. The calcium phosphate bioactive ceramic material is prepared by sintering a nanometer calcium phosphate precursor of which the surface is coated with silicon dioxide. The method for preparing the nanometer calcium phosphate bioactive ceramic material containing the silicon dioxide comprises the following steps: synthesizing an aqueous dispersion liquid of the nanometer calcium phosphate precursor by a liquid phase method; adding the aqueous dispersion liquid in to an active silicic acid solution, and controlling the pH value, the temperature and the time of the reaction to condense and gelatinate the active silicic acid into the silicon dioxide coating on the surface of the nanometer calcium phosphate precursor; and finally, performing drying and high temperature calcination to obtain the calcium phosphate bioactive ceramic material containing silicon dioxide ...

Preparation method and application of building glass responding to ultraviolet light

The invention discloses a preparation method and application of building glass capable of responding to ultraviolet light. The building glass is prepared from the following raw materials in percentage by mole: 35 to 40 percent of SiO2, 10 to 16 percent of Al2O3, 25 to 30 percent of B2O3, 12 to 16 percent of K2CO3, 0.5 to 1.5 percent of AgCl, 0.05 percent of Cu2O and 0 to 5 percent of SrCO3, the sintering temperature is 1550 DEG C, and the sintering time is 30 minutes. According to the high-transparency glass prepared by the preparation method disclosed by the invention, when strong sunlight irradiates the glass, the glass can absorb an ultraviolet light wave band in light rays, so that the glass becomes dark. On one hand, radiation of ultraviolet light to a human body can be reduced, and on the other hand, the indoor temperature is reduced through the darkening degree of the glass. More importantly, when sunlight becomes weak or no sunlight irradiates, the glass can recover to the initial ...

Bismuth doped strontium-aluminum-boron based optical glass and preparation thereof

The invention provides bismuth doped Si-Al-B based optical glass and a preparation method thereof. The optical glass is characterized by comprising the following glass matrixes based on molar percentage: 44 to 55 percent of strontium oxide, 20 to 29 percent of aluminum oxide, 20 to 29 percent of diboron trioxide, 0.1 to 5 percent of dibismuth trioxide, and 0.5 to 1 percent of silicon dioxide or lithium carbonate which is added into the glass matrixes as a fusion aid. The fusion temperature of the glass is obviously reduced compared with quartz glass; and the glass has optical performance covering an ultra-wide band of a communication waveband between 1,000 and 1,600nm , and is expected to be applied in the technical fields of an ultra-wide band optical amplifier, a high power laser, a tunable laser and the like.

Process for producing composite bone restoration bioactive material

The invention provides a method for preparing a composite bone repair bioactive material, which comprises the following steps: performing liquid phase blending to prepare an aqueous solution of a polymer material and a aqueous dispersion liquid of a nanometer hydroxyapatite coated with silicon dioxide; adding a crosslinking agent into the mixed solution to crosslink the polymer material; and then obtaining a porous bracket material through freeze-drying, wherein the porosity of the material is between 80 and 95 percent, and a compact blocky material can be obtained through hot press drying. The composite bone repair bioactive material using the nanometer hydroxyapatite of which the surface layer is coated with the silicon dioxide as an inorganic component is structurally similar to the nanometer hydroxyapatite in bone components, can be similar to bioactive glasses on the physiological reaction activity, and overcomes the defects that in the inorganic component of the prior hydroxyapatite ...

Trivalent chromium ion activated broadband near-infrared luminescent material as well as preparation method and application thereof

The invention discloses a trivalent chromic ion activated broadband near-infrared luminescent material as well as a preparation method and application thereof. The preparation method comprises the following steps: accurately weighing according to a proportion, putting into an agate mortar, adding deionized water, and grinding for 30 minutes; and after the alcohol is completely volatilized and the powder becomes dry powder, transferring the powder into a corundum crucible for sintering, naturally cooling to room temperature, taking out, and grinding for 5-10 minutes, thereby obtaining the product. The fluorescent powder is excited by a 310 nm ultraviolet lamp to generate Cr < 3 + > ion characteristic emission with 970 nm as the center, the full width at half maximum (FWHM) reaches 185 nm, and broadband near-infrared emission is achieved; the optimized NIR fluorescent powder is packaged in a UVLED chip to obtain an NIRpc-LED, and the application prospect of the NIRpc-LED in the field of night ...

Bismuth doped germanium-zinc-boron glass and method of producing the same

The invention provides bismuth-doped germanium-zinc-boron-based optical glass and a preparation method thereof. The glass is characterized in that the glass comprises the following compositions in percentage by mol: 25 to 40 percent of GeO2, 15 to 39 percent of B2O3, 35 to 65 percent of ZnO, and 0.1 to 5 percent of Bi2O3. The glass obviously reduces fusion temperature compared with quartz glass, has the optical performance of ultra broadband which can cover communication wavebands within the range of between 1,000 and 1,600 nm, and expects to be applied to the technical fields such as ultra-broadband optical amplifiers, high-power lasers, tunable lasers and the like.

Preparation method of enhanced frequency conversion luminescent material

The invention relates to preparation method of an enhanced frequency conversion luminescent material and belongs to the technical field of the frequency conversion luminescent material. The preparation method comprises the following steps: pretreating rare-earth ion-containing transparent glass-ceramics prepared by fully mixing the powder of AyOx, ZFx, RyOx and LnyDx, subsequently coating conductive elargol or preparing metal coatings on the surfaces of the rare-earth ion-containing transparent glass-ceramics; then with one or two surfaces of the rare-earth ion-containing transparent glass-ceramics as anodes simultaneously, performing electric field assisted heat diffusion for 10 minutes to 5 hours at the temperature of 200-400 DEG C and under the pressure of 300V-800V; and finally performing heat treatment for 0.5-48 hours at the temperature of 50-250 DEG C below the glass transition temperature to precipitate noble metal nanometer particles out of the glass-ceramics so as to obtain the ...

Rare earth doped transparent halide split-phase glass host material

The invention provides a rare earth doped transparent halide split-phase glass matrix material used for three-dimensional optical storage. The invention is characterized in that the glass comprises the following compositions based on mol percentage: 25 to 40 percent of AlF3, 5 to 65 percent of MgF2, 1 to 15 percent of MX2, 10 to 20 percent of YF3, and 0.1 to 1 percent of ReF3, wherein, M represents one or more of divalent alkaline earth ions of Mg<2+>, Ba<2+> and Sr<2+>; X is one or two of ions of Br<-> and Cl <->; and Re is one or more of trivalent rare earth ions of Sm<3+>, Tb<3+>, Eu<3+> and Ce<3+>. In the rare earth doped transparent halide split-phase glass, a rare-earth ion Re changes an energy threshold value of a valence below 10nJ through the action of femto-second laser, which is more beneficial for information writing of the femto-second laser. After the action of the femto-second laser, the rare earth ion in a halide split-phase has better illumination intensity because of the ...

Method for synthesizing nano hydroxylapatite material with biological activity

The invention provides a method for synthesizing a nanometer hydroxylapatite bioactive material. The method comprises the following steps: firstly, synthesizing a nanometer hydroxylapatite water dispersion liquid by a liquid phase method; secondly, adding an orthosilicate compound, a catalyst, a water soluble organic solvent to the nanometer hydroxylapatite water dispersion liquid; stirring the mixed solution for 2 to 48 hours with the pH value of between 8 and 11 at a temperature of between 20 and 90 DEG C; and finally, washing a reaction product for at least three times to obtain nanometer hydroxylapatite coating silicon dioxide on the surface. The method can prepare the silicon dioxide coated nanometer hydroxylapatite bioactive material with a nuclear shell structure, wherein the grain size, the structure and main compositions are close to a bone nanometer apatite crystal of natural bone; therefore, the material has good bionic performance of the nanometer hydroxylapatite structure and ...

Process for producing nano-hydroxyapatite bioactive material

The invention provides a method for preparing a nanometer hydroxyapatite bioactive material, which comprises the following steps: firstly, synthesizing an aqueous dispersion liquid of the nanometer hydroxyapatite by a liquid phase method; secondly, adding an active ortho silicic acid solution into the aqueous dispersion liquid of the nanometer hydroxyapatite; thirdly, controlling the pH value, the temperature and the time of the reaction to condense and gelatinate the active ortho silicic acid solution into silicon dioxide coating the surface of the nanometer hydroxyapatite so as to obtain the nanometer hydroxyapatite coated with the silicon dioxide. The synthesis method provided by the invention improves the reactivity between bone tissues and the nanometer hydroxyapatite which has a core-shell structure and is coated with the silicon dioxide, and improves the shortage that the common nanometer hydroxyapatite is excessively stable.

Method for regulating upconversion emitting color of rare earth illuminant

The invention discloses a method for regulating upconversion emitting color of a rare earth illuminant, in particular to a method that the photonic bandgap of the inverse opal photonic crystal is changed to regulate the upconversion emitting color of the rare earth illuminant, belonging to the technical fields of photonic crystal and upconversion luminescence. The method disclosed by the invention is characterized in that the size of microspheres in an opal template is changed to regulate the periodic structure dimension of the inverse opal photonic crystal, thus the upconversion emission peak of the rare earth illuminant is overlapped with the band edge of the photonic bandgap, the luminescent intensity of the upconversion emission peak can be increased and the upconversion emitting color of the rare earth illuminant can be regulated. The invention has important application value in the fields such as the upconversion emitting display.

Bismuth doped germanium-zinc-boron glass and method of producing the same

The invention provides bismuth-doped germanium-zinc-boron-based optical glass and a preparation method thereof. The glass is characterized in that the glass comprises the following compositions in percentage by mol: 25 to 40 percent of GeO2, 15 to 39 percent of B2O3, 35 to 65 percent of ZnO, and 0.1 to 5 percent of Bi2O3. The glass obviously reduces fusion temperature compared with quartz glass, has the optical performance of ultra broadband which can cover communication wavebands within the range of between 1,000 and 1,600 nm, and expects to be applied to the technical fields such as ultra-broadband optical amplifiers, high-power lasers, tunable lasers and the like.

Red fluorescent material and preparation method thereof

The invention discloses a red fluorescent material and a preparation method thereof. The invention relates to the technical field of rare earth luminescent material. The red fluorescent material provided by the invention is europium-activated fluorescent powder, and is a solid solution. The material has a chemical general formula of Ca2-x-yGe7O16:xA,yB. In the formula, A is Eu; B is at least one of Li, Na, and K; x is greater than 0 and no greater than 0.15; and y is no smaller than 0 and no greater than 0.15. The preparation method of the red fluorescent material comprises the following steps: various materials are weighed according to the ratio in the chemical general formula, and are ground and well mixed; the mixture is calcined for 10-16h under a temperature of 900-1050 DEG C; and the product is cooled and pulverized, such that the red fluorescent material is obtained. The fluorescent powder provided by the invention has good chemical stability, high excitation efficiency, and high ...

Rare earth doping metal halogenide photostimulable phosphor glass and preparation thereof

The invention provides a rare earth-doped metal halide photostimulated luminescence glass and a method for preparing the same characterized in that the mol percentage composition of the glass is as follows: AlF3 25-40%, BaF2 25-63%, BaCl2 1-15%, BaBr2 1-15%, YF3 10-20%, EuF3 0.1-1%, wherein X is one or two selected from one valence halide ions Cl<-> and Br<->. The rare earth-doped metal halide photostimulated luminescence glass is obtained by melting for 10-45 minutes in a high-frequency furnace under the chlorine or inert atmosphere protection at 800-1000 DEG C and cooling. The method of the invention not only simplifies the preparation steps of the radiation image storage materials of photostimulated liminescence glass, eliminates the external interference factors during the preparation process to work high efficiently, increases the luminous intensity of the rare earth ion in the glass, but also has advantage of rapid heating and cooling.

Synthesis of composite bone restoration bioactive material

The invention provides a method for synthesizing a composite bone repair bioactive material, which comprises the following steps: performing liquid phase blending to prepare an aqueous solution of a polymer material and a aqueous dispersion liquid of a nanometer hydroxyapatite coated with silicon dioxide; adding a crosslinking agent into the mixed solution to crosslink the polymer material; and obtaining a porous bracket material through freeze-drying, wherein the porosity of the material is between 80 and 95 percent, and a compact blocky material can be obtained through hot press drying. Thecomposite bone repair bioactive material using the nanometer hydroxyapatite the surface layer of which the surface layer is coated with the silicon dioxide as an inorganic component is structurally similar to the nanometer hydroxyapatite in bone components, can be similar to bioactive glasses on the physiological reaction activity, and overcomes the defects that in the inorganic component of the prior ...

Tetra-perovskite photocatalytic material and application thereof

The invention discloses a tetra-perovskite photocatalytic material, the chemical formula of the tetra-perovskite photocatalytic material is Cs4Cd (1-x) CuxSb2Cl12, and x is equal to 0-1; belongs to the technical field of novel photocatalytic materials, the tetra-perovskite photocatalytic material is applied to photocatalytic reduction of CO2, tests show that the tetra-perovskite photocatalytic material has the performance of photocatalytic reduction of CO2, the crystal structure is stable, the phase is not changed before and after catalysis, and the material is simple in preparation method, extremely high in efficiency and suitable for industrial production. The method is suitable for industrial production and market popularization and application.

Cobalt ion doped and modified up-conversion photocatalyst as well as preparation method and application thereof

The invention discloses a cobalt ion doping modified up-conversion photocatalyst and a preparation method and application thereof.The preparation method comprises the following steps that Bi2O3 and NH4F are placed in an agate mortar, alcohol is added, the mixture is fully ground to be dried, then the mixture is placed in a corundum crucible and placed in a muffle furnace, high-temperature sintering is conducted, and a precursor BiOF is prepared; putting the precursor into an agate mortar, adding TiO2, Er2O3, Yb2O3 and a cobalt source at the same time, adding alcohol, fully grinding until the mixture is dried, then putting the mixture into a corundum crucible, putting the corundum crucible into a muffle furnace or a reducing atmosphere furnace, and sintering at high temperature. According to the invention, low-energy near-infrared light can be converted into high-energy ultraviolet light or visible light for emission, so that the spectral response range is expanded, and the utilization rate ...

Near-infrared light-emitting perovskite fluorescent powder as well as preparation method and application thereof

The invention discloses near-infrared light-emitting perovskite fluorescent powder as well as a preparation method and application thereof. The preparation method comprises the following steps: accurately weighing according to a proportion, putting into an agate mortar, adding a proper amount of 75% alcohol, and grinding for 15 minutes; and after the alcohol is completely volatilized and the powder becomes dry powder, transferring the powder into a corundum crucible, sintering twice, naturally cooling to room temperature, taking out, and grinding for 5-10 minutes, thereby obtaining the product. The fluorescent powder is excited by a 365nm ultraviolet lamp to generate 1250nm Ni < 2 + > ion characteristic emission, and M5 < + > ions are successfully co-doped to serve as a charge compensation agent, so that the NIR emission intensity is greatly improved by 12 times, the fluorescence quantum efficiency is improved from 7.9% to 19.7%, and the fluorescence thermal quenching performance is improved ...

Layered double-perovskite fluorescent material and preparation method thereof

The invention discloses a layered double perovskite fluorescent material, which is prepared from the following materials by mole percent: 50-60 mol% of CsX; mnX2: 10 to 20 mol%; biX3: 20 to 30 mol%; x is one or more of Cl, Br, I and F elements; the raw materials are mixed and placed in an agate mortar, deionized water is dropwise added for grinding, drying and grinding are performed to obtain powder, and the powder is placed in a heating furnace for heating, heat preservation and cooling to room temperature. A solid phase method is adopted, raw materials are cheap and easy to obtain, no strong acid solvent polluting the environment exists, no harmful waste exists, reaction conditions are mild, samples do not need to be further purified, and the method is easy to operate, low in cost and environmentally friendly; the product provided by the invention has good stability and good quantum efficiency, and is suitable for industrial production.

Near-infrared light induced defect enhanced up-conversion luminescent material and preparation method thereof

The invention discloses a near-infrared light induced defect enhanced up-conversion luminescent material and a preparation method thereof, the general formula of the luminescent material is Bi/Bi (m-x) OnBrq: xRE, under near-infrared laser irradiation, oxygen vacancy defects are formed on the surface of the material in situ through light induction, and the near-infrared light induced defect enhanced up-conversion luminescent material is obtained. The existing oxygen vacancies can effectively expand the response range of light and form a defect intermediate energy level between a BimOnBrq valence band and a BimOnBrq conduction band, so that the transition of electrons from the valence band to the intermediate energy band to the conduction band is realized while the absorption of near-infrared light is increased, and the electrons are promoted to be transferred to the light-emitting energy level of rare earth ions through the defect energy level; and finally, up-conversion luminescence enhancement ...

Green photoexcited fluorescent powder and preparation method thereof

The invention discloses a green photoexcited fluorescent powder and a preparation method thereof and belongs to the technical field of rare earth luminescent materials. The photoexcited fluorescent powder is a silicate powder with a general formula being [beta]-Sr<2-x-y>SiO4: xEu<2+>, yTm<3+> (0.003<=x<=0.004, 0.0003<=y<=0.004). The preparation method includes following steps: (1) mixing and blending SrCO3, SiO2, Eu2O3, Tm2O3 and a fluxing agent NHCl4 according to the general formula of the fluorescent powder; (2) adding alcohol and performing a grinding process for uniformly mixing the raw materials; and (3) sintering the mixed raw materials under a reductive atmosphere at 1300-1400 DEG C for 3-5 h, cooling the sintered raw materials under the reductive atmosphere to room temperature, and performing a grinding process to obtain the photoexcited fluorescent powder [beta]-Sr<2-x-y>SiO4: xEu<2+>, yTm<3+>. The fluorescent powder can be widely applied in following fields: near-infrared laser ...

Rare earth doped transparent halide split-phase glass host material

The invention provides a rare earth doped transparent halide split-phase glass matrix material used for three-dimensional optical data storage. The invention is characterized in that the glass comprises the following compositions in mol percentage: 25 to 40 percent of AlF3, 5 to 65 percent of MgF2, 1 to 15 percent of MX2, 10 to 20 percent of YF3, and 0.1 to 1 percent of ReF3, wherein, M represents one or a plurality of divalent alkaline earth ions of Mg<2+>, Ba<2+> and Sr<2+>; X is one or two kinds of ions of Br<-> and Cl <->; and Re is one or a plurality of trivalent rare earth ions of Sm<3+>, Tb<3+>, Eu<3+> and Ce<3+>. In the rare earth doped transparent halide split-phase glass, a rare-earth ion Fe changes an energy threshold value of a valence below 10nJ through the action of femtosecond laser, which is more beneficial for information writing of the femtosecond laser. After the action of the femtosecond laser, the rare earth ion in a halide split-phase has better illumination intensity ...