Method for preparing nanometer metal powder

Chemical preparing method for nanoemter metal powder

Nano-iron powder prepn. method

Process for modifying spinel type LiMn2O4 through doping

This invention relates to a doped modified method for LiMn2O4 characterizing in adding a certain amount of Sc2O3 in the raw material during the preparation of LiMn2O4 for mixing and grinding, applying a method of solid phase segment reaction to burn it for 5 hours under 470deg.C, 5 hours under 5 30deg.C and 24hours under 800deg.C to get the product, in which the volume attenuation of Sc3+ doped LiMn2O4 is greatly reduced.

Method, system and apparatus for seamless switching

The embodiment of the invention discloses a seamless switching method which comprises the following steps: an intermediate entity belonging to both communication sides receives the mobile information sent by a communication initiator; and the intermediate entity belonging to both communication sides sends the mobile information to the communication receiver, thus establishing the communicating connection between both communication sides. By the method, during the switching process, the communication initiator sends the mobile information of the communication initiator to the communication receiving side by the intermediate entity belonging to both communication sides to establish the communicating connection between both communication sides, thus realizing that the communication initiator can inform the communication receiver of the address change of the communication initiator during the mobile process, and consequently the present communication is not required to be stopped, and the seamless ...

Preparation of ultramicro particle nickel oxide

Switching method, router and communication system

The invention discloses a switching method, a router and a communication system. The embodiment of the invention is characterized in that the embodiment of the invention finishes registering a mobile node on a new access router in advance when the mobile node is to leave an original access point and before the mobile node enters a new access point, i.e. the mobile node is still connected with the original access router, thus reducing switching time delay when the mobile node is disconnected with the original access router and is accessed into a new router, satisfying the requirements of real-time service, such as voice, video and the like, and solving the problem of quick switching based on the network side identification separation agreement.

Method for preparing orthorhombic phase molybdenum trioxide nano wire

The invention discloses a method for preparing an orthorhombic phase molybdenum trioxide nano wire, which is characterized in that molybdate, molybdic acid or molybdenum trioxide is dissolved in aqueous solution with quadrol concentration of 0.2-6 mol/L to cause the mol ratio of molybdenum atom and quadrol to be 1:1-6; and then strong acid solution with hydrogen ion concentration of 0.5-3.0 mol/L is dropwise added under the condition of stirring till the pH value is within 4 to 5; the solution is unceasingly stirred for 10 to 30 min; then the white precipitation is sucked, filtered, washed and dried to obtain white orthorhombic phase single crystal nano wires with the diameter of 100 to 400 nm and the length of 10-40 Mum. In the method, the raw materials are easily obtained; the needed device is simple; the technique is convenient; the reaction can be finished in an hour in the normal temperature and pressure; the method is safe and easy to be controlled; the productive rate reaches more ...

Gold bonding wire and preparation method thereof

The invention discloses a gold bonding wire and a preparation method thereof, and belongs to the field of bonding wire processing, the gold wire is prepared from the following components in percentage by weight: 3wt%-4.5 wt% of palladium, 3.5 wt%-5wt% of silver, 0.001 wt%-0.0005 wt% of copper, 0.001 wt%-0.0004 wt% of nickel, 0.001 wt%-0.0004 wt% of cobalt, 0.003 wt%-0.0007 wt% of calcium, 0.003 wt%-0.0007 wt% of lanthanum, 0.003 wt%-0.0007 wt% of cerium, and the balance of gold and inevitable impurity elements; the gold wire is prepared through smelting, continuous casting, wire drawing and annealing. Wherein in the wire drawing process, a three-section wire drawing process is adopted for specific treatment; the gold content in the gold bonding wire is reduced, the problem that the ductility and breaking strength of the gold bonding wire are reduced is solved, and the strength performance of the original gold bonding wire is improved.

Portable clean gas extinguisher

The invention discloses a portable clean gas extinguisher, which is characterized in that a extinguishing agent storage tank is filled with 2-bromo-3,3,3-trifluoropropene and 1.1-2.2 MPa nitrogen; the storage tank is hermetically connected with an extinguisher head assembly, wherein the extinguisher head assembly consists of a handle, a pressure grip, a screw pin, a pressure rod, a sealing plate at the bottom of the pressure rod, a spring under the pressure rod, an extinguishing agent inlet pipe orifice, an outlet passage and an outlet pipe orifice; the extinguishing agent inlet pipe orifice is connected with the upper port of an extinguishing agent suction pipe, wherein the lower port of the extinguishing agent suction pipe extends to be close to the bottom of the extinguishing agent storage tank; one end of a spraying hose is connected with an extinguishing agent outlet pipe, while the other end of the spraying hose is connected with a sprayer; the sprayer is composed of a tapered outer ...

Gas-solid composite powder base fire-extinguishing agent and preparation method thereof

The invention discloses a gas-solid composite ultra-fine powder-based extinguishing agent and a preparation method thereof, which are characterized in that according to the mass percentage in the system, 73-89 percent of ultra-fine zeolite, with the average particle size below 10 microns is arranged in a pressure withstanding vessel for vacuum-pumping; subsequently, 5.0-20.0 percent of 2-bromine-3, 3, 3-trifluoropropene liquid is injected into the vessel, stands for 12-24 hours at the temperature of 35-50 DEG C and cooled to room temperature; subsequently, 0.5-2.0 percent of barium hydroxide and 2.5-5.0 percent of talcum powder are added into the vessel and all powders are uniformly mixed; the obtained gas-solid composite ultra-fine powder-based distinguishing agent has high distinguishing efficiency, low corrosion and good anti-afterburning; the raw material is cheap and easy to be obtained; the preparation process is simple; the gas-solid composite ultra-fine powder-based distinguishing ...

Heavy sump oil breakdown of emulsion dewatering device

Heavy sump oil breakdown of emulsion dewatering device belongs to sump oil dehydration recycle equipment field. Including sump oil storage tank and medicament storage tank (5), the sump oil storage tank has a plurality ofly, through return line (3) intercommunication, is equipped with backwash pump (7) on return line (3) between the sump oil storage tank, and medicament storage tank (5) are through medicament conveyor and arbitrary one sump oil storage tank intercommunication. All do not set up agitating unit in the storage tank, the construction degree of difficulty that sets up the stirring moreover in so big storage tank is also very big, and the expense is high, and this application communicates each sump oil storage tank through return line (3), can make heavy sump oil and medicament homogeneous mixing through the mode of tank switching like this, the tank switching shifts the weight sump oil between a plurality of sump oil storage tanks repeatedly, just so can effectively realize ...

Low temperature molten salt synthetic method of li1+xV3O8 nano powder electrode material

Preparation process for ultramicro particle nickel oxide

The preparation of nickel oxide ultramicroparticles involves the steps of mixing nickel salt with ammonium bicarbonate or ammonium carbonate, adding water, stirring until pH value 6.5-7.5, separating solid from liquid, washing the filter residue, drying, thermal decomposing under 400-1000 deg.C., thus obtaining highly pure nickel oxide with average particles diameter 5-150 nm. Advantage: high activity, simple technology, high yield, energy saving and water saving.

Method for preparing nanometre metal cobalt powder or nickel powder

The preparation features that NaOH in the weight of 2-5 times that of cobalt salt or nickel salt is first added into hydrazine hydrate solution in the molar amount of over 3 times that of cobalt or nickel ion, and the solution is further mixed homogeneously with alcohol-water solution of cobalt salt or nickel salt for reaction carried out automatically. The cobalt or nickel powder thus obtained has excellent magnetic performance and catalytic performance. The method has the features of cheap material, simple technological process, no need of heating , high speed and efficiency, high yield andmother liquor capable of being used repeatedly. The method may be also used for surface coating and modifying of particles.

Portable clean gas extinguisher

The invention discloses a portable clean gas extinguisher, which is characterized in that a extinguishing agent storage tank is filled with 2-bromo-3,3,3-trifluoropropene and 1.1-2.2 MPa nitrogen; the storage tank is hermetically connected with an extinguisher head assembly, wherein the extinguisher head assembly consists of a handle, a pressure grip, a screw pin, a pressure rod, a sealing plate at the bottom of the pressure rod, a spring under the pressure rod, an extinguishing agent inlet pipe orifice, an outlet passage and an outlet pipe orifice; the extinguishing agent inlet pipe orifice is connected with the upper port of an extinguishing agent suction pipe, wherein the lower port of the extinguishing agent suction pipe extends to be close to the bottom of the extinguishing agent storage tank; one end of a spraying hose is connected with an extinguishing agent outlet pipe, while the other end of the spraying hose is connected with a sprayer; the sprayer is composed of a tapered outer ...

Preparation method of spherical nickel hydroxide

The invention provides a method for preparing spherical nickel hydroxide, comprising adding firstly the ammonia solution with the ammonia as much as 3-6 times than nickel-ion in mass into the nickel solution, keeping the pH value of the solution between 9.5~12.0, stirring and heating the solution and keeping the temperature 40-90 DEG C and getting the spherical nickel hydroxide. Adding the sodium-hydroxide slowly into the system when the pH value drops to a certain value between 8.5-10.5 until the blue of the parent solution disappears, controlling the velocity of adding ammonia and keeping the pH value stable, after stirring, aging and getting the spherical nickel hydroxide. The invention is characterized by the simple process and high efficiency, easiness to control the reaction condition, and the control of the density, size and electrochemical character of the product by regulating the material proportioning, the concentration of the solution, pH value and temperature and so on. It ...

Gas-solid composite powder base fire-extinguishing agent and preparation method thereof

The invention discloses a gas-solid composite ultra-fine powder-based extinguishing agent and a preparation method thereof, which are characterized in that according to the mass percentage in the system, 73-89 percent of ultra-fine zeolite, with the average particle size below 10 microns is arranged in a pressure withstanding vessel for vacuum-pumping; subsequently, 5.0-20.0 percent of 2-bromine-3, 3, 3-trifluoropropene liquid is injected into the vessel, stands for 12-24 hours at the temperature of 35-50 DEG C and cooled to room temperature; subsequently, 0.5-2.0 percent of barium hydroxide and 2.5-5.0 percent of talcum powder are added into the vessel and all powders are uniformly mixed; the obtained gas-solid composite ultra-fine powder-based distinguishing agent has high distinguishing efficiency, low corrosion and good anti-afterburning; the raw material is cheap and easy to be obtained; the preparation process is simple; the gas-solid composite ultra-fine powder-based distinguishing ...

Environment-friendly type metal surface finishing agent and preparation thereof

The invention discloses an environmental-friendly type metal surface treating agent and a preparing method thereof which has steps as follows: moistening a filmerformer by a solution containing dispersant, then adding a coupling agent, stirring and dispersing for obtaining a steady colloid, adding water-soluble Si or complex compound containing F of IV family element, then adding acid as stabilizing agent and excess water, adjusting PH value of the system 1.0-3.0 and obtaining the environmental-friendly type metal surface treating agent. The environmental-friendly type metal surface treating agent is diluted to a working liquid with PH value 3.0-6.0 by using water, a micro-crystalline ceramic compound conversion film is obtained by contacting the waited-treat clean metal surface with the environmental-friendly type metal surface using immerging or spraying method. The treating agent has performance index of the treating agent is superior or equal to prior zinc family, iron family phosphate ...

Mini LED screen packaging adhesive film, preparation method and packaging method

According to the Mini LED screen packaging adhesive film, the preparation method and the packaging method provided by the invention, the Mini LED screen packaging adhesive film comprises epoxy resin, UV resin, silica powder, a reactive diluent, solvent-free carbon black color paste and fumed silica, a light-heat dual-solid system with good compatibility is adopted, and different macromolecular chains are subjected to segmented curing, crosslinking and winding under the light-heat dual-solid system; the flexible UV component and the rigid epoxy component are matched to facilitate release of curing internal stress, so that the curing warping degree is reduced, fused silica powder with different particle sizes and refractive indexes is used for compounding, the warping rate, the light transmittance, the haze and the thermal conductivity are optimized through the dense degree of powder stacking, and the curing effect is improved. According to the preparation method, the semi-cured film is prepared ...

Gold alloy bonding wire and preparation method thereof

The invention discloses a gold alloy bonding wire and a preparation method of the gold alloy bonding wire, and belongs to the field of gold bonding wires. 3 to 4.5 percent of palladium; 0.0028% to 0.0032% of copper; 0.0018% to 0.0022% of nickel; 0.0018% to 0.0022% of cobalt; 0.0001% to 0.005% of silicon; 0.0001% to 0.005% of indium; 0.0001% to 0.005% of calcium; 0.0001% to 0.005% of lanthanum; 0.0001% to 0.005% of cerium; according to the bonding wire prepared through the preparation method, the overall toughness and breaking strength of the gold alloy bonding wire are improved, the ductility of the alloy bonding wire is maximally improved by 35.8%, and the breaking strength is improved by 24.6%.

High-strength gold bonding wire and preparation method thereof

The invention discloses a high-strength bonding gold wire and a preparation method thereof, and belongs to the field of bonding alloy wires, and the high-strength bonding gold wire is composed of palladium, silver, nickel, cobalt, calcium, copper, lanthanum and the balance of gold and inevitable impurity elements. According to the preparation method, the elongation, the tensile strength and the like of the gold bonding wire can be remarkably improved, the mechanical performance of the gold bonding wire can be improved while the gold content is reduced, and the mechanical performance of the gold bonding wire can be improved in a two-section casting mode through the specific temperature and the specific ultrasonic power. And the prepared gold wire has excellent properties of elongation, tensile strength and breaking force.

Sump oil dross processing apparatus

Sump oil dross processing apparatus belongs to effluent oil recovery treatment facility field. Including mixing stirred tank (1) and settling cask (4), mix the waste water that stirred tank (1) receipt comes from sump oil dewatering device, mix the upper portion import of the lower extreme export intercommunication settling cask (4) of stirred tank (1), the lower extreme of settling cask (4) communicates dross jar (5), middle part intercommunication water pitcher (6), upper portion intercommunication oil tank (7). The waste water that mixed stirred tank will come from sump oil dewatering device mixes with the activating agent stirring, make activating agent and sump oil intensive mixing, waste water after the mixture subsides in sending into the settling cask, the layering takes place for waste water in the settling cask, the proportion of dross is the biggest, the deposit is in the bottom of settling cask, water meeting deposit is at the middle part of settling cask, the proportion of ...

Method for preparing orthorhombic phase molybdenum trioxide nano wire

The invention discloses a method for preparing an orthorhombic phase molybdenum trioxide nano wire, which is characterized in that molybdate, molybdic acid or molybdenum trioxide is dissolved in aqueous solution with quadrol concentration of 0.2-6 mol/L to cause the mol ratio of molybdenum atom and quadrol to be 1:1-6; and then strong acid solution with hydrogen ion concentration of 0.5-3.0 mol/Lis dropwise added under the condition of stirring till the pH value is within 4 to 5; the solution is unceasingly stirred for 10 to 30 min; then the white precipitation is sucked, filtered, washed and dried to obtain white orthorhombic phase single crystal nano wires with the diameter of 100 to 400 nm and the length of 10-40 Mum. In the method, the raw materials are easily obtained; the needed device is simple; the technique is convenient; the reaction can be finished in an hour in the normal temperature and pressure; the method is safe and easy to be controlled; the productive rate reaches more ...

Preparation method of low-water-absorptivity phenyl hydrogen-containing silicon resin

The invention discloses a preparation method of a low-water-absorptivity phenyl hydrogen-containing silicon resin, which is characterized by comprising the following steps: (1) mixing for reaction; (2) hydrolysis; (3) polycondensation; (4) removal; and (5) preservation. Compared with the prior art, by using phenyl alkoxy silane monomer as the raw material and a cationic resin as a catalyst to prepare the phenyl hydrogen-containing silicon resin by hydrolytic polycondensation, the technique has the advantages of high production efficiency, less wastewater, low hydroxy content and low water absorptivity. The LED (light-emitting diode) packaging adhesive prepared by using the phenyl hydrogen-containing silicon resin as the crosslinking agent has the advantages of cold/heat shock resistance, no blasting by ultrahigh-temperature reflux welding and long service life.

Switch method, mobile node, router and communication system

The invention relates to the technical field of communication, and discloses a switch method, a mobile node, a router and a communication system, wherein the switch method comprises the following steps: receiving a switch information request sent by the mobile node; acquiring the address information of a neighbor router, and sending a switch start signaling to the neighbor router according to the address information of the neighbor router; receiving a new address of the mobile node sent by the neighbor router, wherein the neighbor router sends the new address after receiving the switch start signaling; and sending the new address to the mobile node so that the mobile node can use the new address to initiate relevance reconstruction with a communication node after a communication link is interrupted. By utilizing the technical scheme provided by the embodiment of the invention, the new address of the mobile node can be determined before the communication link of the mobile node is interrupted ...

Chemicalpreparing method for nanometre metal iron powder

The present invention features that through the procedures of dissolving ferric salt in water or ethanol, addition of hydrazine hydrate and NaOH, sealed heating at 100-250 deg.c in a reactor, maintaining temperature for at least 2 hr, cooling, separation, washing and vacuum drying, the nanometer metal iron powder is produced. A further process may be carried out for compounding or cladding of Fe,Co, Ni, Ag (Cu), etc. Hydrazine hydrate in the mother solution may be reused or recovered through producting N2H4SO4. The method of the present invention has an iron powder yield up to 95% and the product has an iron content over 97% and an average grain size below 40 nm.

Synthesis device and method of gaseous extinguishing agent

The invention discloses a synthesis device and method of a gaseous extinguishing agent. The synthesis device is characterized in that a reaction still is connected with an agitator, a trifluoropropene storage tank, a liquid bromine storage tank, an alkali liquor storage tank and a fractional distillation tube, the tail end of a branch tube of the fractional distillation tube goes into a collecting bottle, the adding order of raw materials can be controlled through a plurality of switching valves, and halon is synthesized by one step to substitute for a clean gaseous extinguishing agent. Three operation steps of addition, elimination and fractionation can be performed in the synthesis device, and the whole synthesis flow is free from transferring of any intermediate product from the step of feeding materials to the step of obtaining the target product, so that the material loss is avoided, the reaction yield is improved, the reaction time is saved, and the reaction efficiency is improved ...