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58results about How to "Moderate conditions" patented technology

Preparation method of three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres

The invention relates to a preparation method of three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres, and relates to the technical field of multi-level structured nano-grade catalyst materials. First, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are adopted as a nickel source and a cobalt source, a deionized water-isopropanol mixed phase with a proper proportion is adopted as a solvent, methanol is adopted as a reactant, and no additional base precipitating agent is adopted; a three-dimensional flower-shaped nano-sheet microsphere precursor is prepared in a Ni<2+>-Co<2+>-NH3-NH4<+>-SG<n->-H2O-IPA-CH3OH system (SG<n-> is CO3<2-> or HCOO<->); the temperature is increased to 300-400 DEG C in an air atmosphere with a speed of 1 DEG C / min, and the precursor is calcined for 2-3h, such that the three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are obtained. According to the invention, co-precipitation of the formulated cobalt and nickel in the raw materials is realized. The prepared three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are spinel cubic phases with high purity, and are formed by ultrathin nano-sheet self-assembly. The microspheres comprise rich mesopores, and have a large specific surface area. The method has the advantages of simple operation, appropriate conditions and easy control.
Owner:BEIJING UNIV OF CHEM TECH

Process For Producing Solubilized Keratin

A process for producing a solubilized keratin of utility value easily with high yield while suppressing coloration and smelling occurring in the hydrolysis of keratin. There is provided a process for producing a solubilized keratin, characterized in that it comprises regulating the water content of keratin raw material to a hydrous state of 20 to 80%, hydrolyzing the same in an alkali solution, neutralizing the hydrolyzate liquid, and extracting a keratin hydrolyzate from the supernatant.
Owner:NOKODAI TLO KK

Preparation method of carbon nanotube/silica/carbon composite cathode material

The invention relates to a preparation method of a carbon nanotube / silica / carbon composite cathode material and belongs to the field of electrochemical power sources. The composite cathode material is composed of a carbon nanotube, silica and amorphous carbon. The preparation method: respectively dissolving hexadecyl trimethyl ammonium bromide and lithium hydroxide in an alcohol solution; placing the carbon nanotube in the alcohol solution, dissolving silica with tetraethoxysilane as a raw material in the alcohol solution, and stirring, filtering and drying to obtain carbon nanotube / silica; using sucrose as a carbon source, mixing carbon nanotube / silica with sucrose, dissolving in deionized water, removing water through stirring and drying, sintering for certain time at high temperature under protection of inert gas, and cooling to obtain carbon nanotube / silica / carbon. The composite cathode material has high specific capacity and excellent circulating stability. The preparation method is simple, moderate in preparation condition and low in cost.
Owner:HUNAN UNIV

Polyurethane mixed microcapsule and preparation method thereof

The invention relates to the field of microcapsule preparation, and in particular relates to a polyurethane mixed microcapsule and a preparation method thereof. The polyurethane mixed microcapsule includes a polyurethane-coated isocyanate microcapsule, a polyurethane-coated hydroxyl compound microcapsule and an auxiliary agen; a wall layer of the polyurethane-coated isocyanate microcapsule is polyurethane, a core layer is isocyanate; a wall layer of the polyurethane-coated hydroxyl compound microcapsule is the polyurethane, a core layer is a hydroxyl compound; the auxiliary agent is a polyurethane catalyst. The prepared polyurethane mixed microcapsule has good spandex compatibility, heat resistance and impermeability.
Owner:WUHAN TEXTILE UNIV +1

Preparation method for carbon-coated nano-titanium dioxide electrode material

The invention relates to a preparation method for carbon-coated nano-titanium dioxide electrode material for a lithium-ion battery. The preparation method comprises the following steps: using titanium sulfate as a titanium source, and glucose or sucrose as a carbon source, weighing the titanium sulfate and the carbon source in a certain mass ratio, and respectively dissolving the titanium sulfate and the carbon source in deionized water; adding the aqueous solution of the carbon source into the aqueous solution of the titanium sulfate, stirring uniformly, and transferring to a hydrothermal reaction kettle; keeping temperature for a certain time, cooling, washing a resultant, filtering, and drying; under the protection of an argon atmosphere, calcinating at high temperature to obtain the carbon-coated nano-titanium dioxide electrode material. According to the preparation method for the carbon-coated nano-titanium dioxide electrode material, selected raw materials are low in cost; the prepared carbon-coated nano-titanium dioxide electrode material has excellent charge-discharge cycle performance, so that requirements on the electrode material of the lithium-ion battery can be met; the preparation method is simple in process and easy in industrial production.
Owner:HUNAN UNIV

Method for carrying out regeneration treatment on useless lubricating oil

The invention discloses a method for carrying out regeneration treatment on useless lubricating oil, and belongs to the technical field of an oil product quality improving technological process in a petroleum processing technology. The method comprises a solvent treatment step, a membrane separation step, a hydrogenation modification step, an adsorption, supplementation and purification step and a normal-pressure fractionation step. According to the method disclosed by the invention, most of metal and polar additives can be removed by adopting a solvent treatment method and a membrane separation method, aromatic hydrocarbon, heteroatoms, undissolved matters and most of residual carbon and residual metal can be removed through the hydrogenation modification step of a stationary bed, and residual polar additives can be further removed through the adsorption, supplementation and purification step, so that the light stability and the thermal stability of a product are increased, high-quality lubricating oil base oil can be produced, and byproducts of high-quality naphtha and high-quality diesel can be produced.
Owner:台州天天环保科技有限公司 +1

Emulsifier composition and preparation method thereof

InactiveCN105524601AIncrease emulsification efficiencyImprove electrical stabilityDrilling compositionPolyamideFatty acid ester
The invention provides an emulsifier composition and a preparation method thereof, belonging to the technical field of drilling fluids. The emulsifier composition comprises a main emulsifier, an auxiliary emulsifier and base oil, wherein the main emulsifier is oxidatively polymerized fatty acid ester and the auxiliary emulsifier is polyamide. The emulsifier composition provided by the invention respectively uses oxidatively polymerized fatty acid ester and polyamide as the main emulsifier and the auxiliary emulsifier, so emulsification efficiency of the composition is improved, electrical stability of the composition is enhanced, and preparation and usage of oil-based drilling fluids are facilitated.
Owner:天津滨海新区普瑞德石油科技有限公司

Catalyst support

A support for a catalyst for controlling vehicular exhaust emissions comprising a high surface area refractory metal oxide, e.g., gamma-alumina, having a monomolecular layer of a second oxide selected from the group consisting of titanium dioxide, cerium dioxide and zirconium dioxide. Typically, the monomolecular layer will have a thickness of less than about 10 angstroms. The support may be converted into a vehicular exhaust emission control catalyst by depositing the support on a substrate such as cordierite depositing a precious metal component such as platinum on at least part of the monomolecular layer. Preferably, the catalyst will also contain at least one NOx storage component deposited on at least part of the monomolecular layer. Catalysts prepared using the catalyst supports of the invention exhibit outstanding thermal stability and resistance to sulfur poisoning.
Owner:ENGELHARD CORP

Method for preparing Zn<2+> doped SnS2 nano-photocatalysis material Sn(1-x)ZnxS2 with microwave hydrothermal method

The invention discloses a method for preparing a Zn<2+> doped SnS2 nano-photocatalysis material Sn(1-x)ZnxS2 with a microwave hydrothermal method. The method comprises steps as follows: 1), preparing an Sn source solution A, adding a zinc source, stirring the mixture until the mixture is sufficiently dissolved to obtain a solution B, meanwhile, regulating pH of the solution B in a range from 1 to 9, and preparing a NaS*9H2O solution C with the concentration of 0.1-2.4 mol / L; 2), mixing the solution B and the solution C in proportion to obtain a solution D, and stabilizing the solution D to obtain a solution E; 3), putting the solution E into a microwave hydrothermal reaction kettle, and sealing the hydrothermal kettle for microwave hydrothermal reaction to obtain a precursor; 4), taking out the precursor after the reaction kettle is naturally cooled to the room temperature, and performing centrifugal washing separation and drying to obtain a final product Sn(1-x)ZnxS2 nano-photocatalysis material. The nano-photocatalysis material is applied to organic dye degradation and has excellent photocatalytic degradation performance.
Owner:SHAANXI UNIV OF SCI & TECH

High-coulombic-efficiency negative electrode active material of carbon-coated lithium-rich lithium titanate of lithium ion battery and preparation method for high-coulombic-efficiency negative electrode active material of carbon-coated lithium-rich lithium titanate

The invention provides a negative electrode active material of a lithium ion battery. The negative electrode active material is a powder composite material prepared from a carbon-coated compound of which the molecular formula is Li4+xTi5O12, wherein x is more than 0 and less than or equal to 3. A method for preparing the negative electrode active material comprises the following steps of: fully mixing three types of powder materials of a lithium source, a titanium source and a carbon source in an inert-gas-protected atmosphere, and performing high-temperature solid-phase sintering; and cooling to the room temperature. The negative electrode active material is a lithium-rich lithium titanate material with a stable structure in the air at normal temperature and normal pressure, is convenient to manufacture, use and store, and can be popularized and used on a large scale; and for the lithium ion battery prepared from the negative electrode active material, the first cycle coulombic efficiency is 100 percent higher than a theoretical value, and the first cycle irreversible capacity loss of the battery is eliminated. The method for preparing the negative electrode active material is moderate in condition and simple in technological process, can be very easily applied to industrial production, and is environment-friendly.
Owner:HUNAN UNIV

Method for preparing active carbon fiber-loaded Co3O4 catalysis material

The invention belongs to the technical field of sewage processing, and concretely relates to a method for preparing an active carbon fiber (ACF)-loaded Co3O4 catalysis material. The method comprises the following steps: weighing a proper amount of active carbon fiber and placing the active carbon fiber in a nitric acid solution for immersion, taking ACF out and using distilled water for washing bymultiple times to a neutral state, after drying, adding Co(NO3)2.6H2O and Na(NO3)2 in a hexyl alcohol beaker, performing magnetic stirring to uniform mixing, transferring the material to a round-bottom flask, adding pre-treated active carbon fiber in the round-bottom flask, and after immersion for 10 h, performing oil-bath backflow heating. The method is used for preparing the Co3O4 / ACF catalyst,on one hand, absorption effect of the active carbon fiber is used, dye waste water is absorbed surrounding the active carbon fiber, on the other hand, the catalyst Co3O4 is loaded on the active carbon fiber, the catalyst has low dissolution rate and high-efficiency catalytic oxidation effect, and has good degradation effect on the high-concentration difficultly-degraded dye waste water.
Owner:SICHUAN AGRI UNIV

Method for bionically preparing water-soluble gold nanoparticles

The invention discloses a method for bionically preparing water-soluble gold nanoparticles. In the method, the water-soluble gold nanoparticles are prepared in the like biological system based on the reduction reaction and enzyme catalysis process in the cells. The method is simple and practicable, the used reagent is environmentally friendly and the controllable gold nanoparticles with uniform size can be obtained under room temperature. With surfaces cladded by a layer of dense glutathione molecules, the products have good stability in the aqueous solution. The method provides a new train of thought for green synthesis of nano materials.
Owner:WUHAN UNIV

3-cyan substituted indole compound and synthetic method thereof

The invention relates to a 3-cyan substituted indole compound and a synthetic method thereof. The constitutional formula of the compound is that R1 is a methoxy group, and R2 is phenyl (Ph), benzyl (Bn), allyl or n-butyl. According to the synthetic method of the 3-cyan substituted indole compound, raw materials are easy to obtain, novel tertiary butyl isonitrile is firstly used as a source of cyan, and high toxic metal cyanide is avoided to be used. During the reaction, conventional reaction solvents are used, the operation is simple, the operation condition is moderate, the reaction is environment-friendly, the top yield can reach 74%, and the 3-cyan substituted indole compound has a good application prospect in industrial production.
Owner:SHANGHAI UNIV

Vacuum and low temperature intelligent food vending machine

The invention belongs to the technical field of vending machine, and particularly relates to a vacuum and low temperature intelligent food vending machine which comprises a supporting plate, wherein aplurality of partition plates are arranged on the supporting plate to divide the supporting plates into multiple goods channels for goods stacking, a discharging mechanism is arranged on one side ofthe supporting plate and a first conveyer belt is arranged on the opposite side, the goods is driven by the discharging mechanism to fall onto the first conveyer belt, conveyed to the discharging pipeline through the first conveyer belt and fall into a transfer bin which is arranged at the bottom of the discharging pipeline, a second conveyer belt is arranged in the transfer bin and used for transferring the goods to a goods taking bin, and the discharging pipeline is provided with a one-way door for goods to enter the discharging pipeline. According to the vending machine, the temperature, the vacuum degree and other conditions of the vending machine are not changed violently due to the matching of the first conveyer belt and the discharging pipeline, and the the discharging pipeline andthe transfer bin, and starting related device many times to maintain the temperature inside the vending machine and the vacuum degree condition are avoided, so that the energy consumption is reduced.
Owner:永州巨米智能科技有限公司

Doped modified lithium ion sieve and preparation method and application thereof

ActiveCN108579661ASolve the problem of easy melting lossThe unit cell structure is stableOther chemical processesWater contaminantsLithiumDissolution
The invention discloses a doped modified lithium ion sieve. The doped modified lithium ion sieve adopts a molecular formula as follows: HMxMn2-xO4, wherein M is Co or Ni and x is greater than or equalto 0.020 and smaller than or equal to 0.095; the crystal form of the doped modified lithium ion sieve is a single pure-phase spinel crystal form; the lithium ion sieve is spherical and has the average particle diameter of 2-5 microns. The invention further correspondingly provides a preparation method and the application of the doped modified lithium ion sieve. Through doping modification of nickel or cobalt, the cell structure of the doped modified lithium ion sieve is more stable, so that the problem of easy dissolution of the conventional HMn2O4 lithium ion sieve is solved, and the doped modified lithium ion sieve can be repeatedly recycled for many times; in addition, the doped modified lithium ion sieve has excellent morphology, small average particle size and a relatively large specific surface area, and the specific morphology thereof benefits sufficient contact of lithium-containing liquid, facilitates intercalation and extraction of lithium ions and benefits maintenance of the cycle stability of a material.
Owner:CENT SOUTH UNIV

High-hardness thermosetting self-repairing polyurethane and preparation method thereof

ActiveCN110845692AImprove self-healing efficiencyHigh hardness transparentDisulfide bondingPolymer science
The invention provides high-hardness thermosetting self-repairing polyurethane and a preparation method thereof. According to the technical scheme, isocyanate-terminated polyurethane containing 2-hydroxyethyl disulfide as a functional group, and polyvinyl alcohol grafted polycaprolactone are cross-linked and cured to synthesize thermosetting self-repairing polyurethane with high self-repairing efficiency, high hardness and transparency. Self-repairing of the material is achieved on the basis of disulfide bond exchange reaction, polyvinyl alcohol grafted polycaprolactone is taken as a cross-linking agent to provide a cross-linking network, and the obtained material has excellent mechanical properties, high Young modulus, good transparency, high self-repairing efficiency, shape memory, reprocessing and other properties. Besides, the invention also discloses a synthesis method of the polyvinyl alcohol grafted polycaprolactone, the polyvinyl alcohol grafted polycaprolactone prepared by themethod has a plurality of hydroxyl sites, the hydrogen bond interaction among molecular chains is increased, and higher chemical and physical crosslinking degree is achieved.
Owner:JIANGXI SCI & TECH NORMAL UNIV

Method for preparing cu-btc and nano-cu-btc

The methods for preparing Cu-BTC and nano-Cu-BTC are disclosed. An imporous coordination compound Cu(C9H4O6)(H2O)3 is impregnated an organic solvent or a steam environment thereof to obtain Cu-BTC. Cu-BTC is impregnated in an acidic protic solvent environment and filtered to obtain a solid, and the solid is impregnated in a non-acidic organic solvent or a steam environment thereof, centrifuged, washed, and dried, to obtain nano-Cu-BTC.
Owner:NANJING UNIV OF TECH +1

Preparation method of biological template for porous tubular nano-metal oxide

The invention discloses a preparation method of a biological template for porous tubular nano-metal oxide. A sorghum straw with a natural multi-dimensional fine, graded and porous structure is taken as a biological template, and porous tubular nano-metal oxide is formed in situ by virtue of the biological template through immersion treatment and subsequent hydrothermal reaction and oxidizing roasting. The preparation method has the beneficial effects that the process is simple, conditions are moderate, the controllability is good, and the industrial production is easily realized. The material prepared by virtue of the preparation method has a fine pore structure and a high specific surface area, so that the surface response characteristic and reuse performance of the material can be greatly improved, and the material has wide application prospects in the fields of gas sensors, photocatalysis, supercapacitors and lithium ion battery electrode materials and the like.
Owner:HUAQIAO UNIVERSITY

Method for planting zinc-rich chrysanthemum nankingense

The invention discloses a method for planting zinc-rich chrysanthemum nankingense. The method comprises the following steps: (1) germination and seedling culture; (2) transplantation and final singling; and (3) harvesting. According to the method for planting zinc-rich chrysanthemum nankingense, seeds are adopted to cultivate plenty of seedlings, germination conditions are controlled strictly, the germination rate is high, seedlings grow vigorously, and the growth vigor is uniform; a non-woven fabric for laying is used, is favorable for water absorption, moisture preservation and breathability and can be reused, and the cost is reduced; soilless culture is performed after the transplantation, growth conditions are controlled strictly, hard-light, intermittent and long-time illumination is adopted, chrysanthemum nankingense branching and germination are promoted, flowering is delayed, the picking period is prolonged, and the yield is improved obviously; the content of zinc and selenium in nutrient solution is high, minerals are comprehensive, promote absorption and utilization and are favorable for growth, a health care function is enhanced, and the zinc-rich chrysanthemum nankingense can clear away heat and toxic materials, is resistant to oxidization, aging and tumor, enhances immunity, promotes gastrointestinal functions and protects heart and cerebral vessels; the nutrient solution is rich in microorganisms, the disease resistance is improved, the use of pesticides is avoided, and the planting cost is reduced.
Owner:霍山县安绿园农业发展有限公司

Hollow spherical LiTiO2 material and preparation method thereof

The invention discloses a hollow spherical LiTiO2 material and a preparation method thereof, belonging to the technical field of battery electrode materials. The preparation method comprises the following steps: (1) selecting a lithium source, preparing the lithium source into a lithium-containing solution with concentration of 1.5-2.5mol / L, adding a titanium source in the lithium-containing solution, uniformly mixing to obtain a mixed solution, fully and uniformly mixing the mixed solution at temperature of 20-100 DEG C to obtain a reaction precursor solution; (2) performing hydrothermal reaction on the reaction precursor solution at temperature of 120-200 DEG C and then cooling to room temperature, and then centrifugally collecting a precipitate; and (3), cleaning the precipitate and then drying to prepare the hollow spherical LiTiO2 material. The hollow spherical LiTiO2 material is prepared by adopting a microwave hydrothermal process; the preparation method effectively combines advantages of a hydrothermal process and a microwave technology, and can be used for preparing an electrode material which is high in product purity and uniform in size within a short time; the shape of the electrode material is easily controlled. The microwave hydrothermal process is simple in procedure, moderate in conditions, free from special process equipment, and environmental-friendly; the industrialized production is easily realized.
Owner:SHAANXI UNIV OF SCI & TECH

Method for preparing lithium ion battery negative electrode material lithium titanate

The invention discloses a method for preparing a lithium ion battery negative electrode material lithium titanate, belonging to the technical field of battery electrode materials. The method comprises the following steps: (1) dripping a lithium-containing solution into a tetrabutyl titanate solution, fully and uniformly stirring, thereby obtaining emulsion; (2) adding the emulsion into a drying box to react until the emulsion becomes a solid-state product; and (3) grinding the solid-state product prepared in the step (2), and performing heat treatment, thereby obtaining the lithium ion battery negative electrode material lithium titanate. According to the method disclosed by the invention, the preparation process is simple in process, the conditions are moderate, special process equipment is not needed, and industrial production is easily realized. The lithium titanate material prepared by the method disclosed by the invention is high in purity and high in crystallinity and can reach the nanoscale, the lithium ion diffusion path is effectively shortened by the material, the rate performance is improved, and the material has good electrochemical performance.
Owner:SHAANXI UNIV OF SCI & TECH

2-cyano-substituted indole compound and synthetic method thereof

The invention relates to a 2-cyano-substituted indole compound and a synthetic method thereof. The structural formula of the compound is shown in the specifications, wherein R1 is pyridyl or pyrimidinyl; and R is methyl, methoxyl, bromine or -CO2Me. The 2-cyano-substituted indole compound prepared with the method is a type of important organic synthetic intermediate. The method has the advantages of readily-available raw materials, high reaction selectivity, adoption of novel isocyanide as a cyano source, use of the conventional solvent in a reaction, easiness for operating, appropriate reactions, environment-friendly reaction, maximum reaction yield of up to 92 percent, applicability to industrial production and the like.
Owner:SHANGHAI UNIV

Preparation method of compound flocculation algae inhibitor and compound flocculation algae inhibitor

The invention discloses a preparation method of a composite flocculation algae inhibitor, and belongs to the technical field of environmental protection. The preparation method is characterized by comprising the following steps: the preparation of chitosan-loaded algae inhibitor powder; the immobilization of alga inhibiting bacteria and the cationic modification of a flocculation agent; and compounding of the chitosan-loaded algae inhibitor and the biological composite modified flocculation agent. The invention also discloses the composite flocculation algae inhibitor. According to the composite flocculation algae inhibitor prepared by the preparation method disclosed by the invention, a good flocculation and algae removal effect can be achieved; a microbial agent with an alga inhibiting function is introduced while algae removal by flocculation is carried out, and a synergistic effect with the algae inhibitor is achieved, so that a long-acting algae inhibiting capability of water bodyis improved, and over-propagation of algae is prevented. According to the preparation process provided by the invention, the raw materials are low in price, the preparation cost is low, and the natural ecological system cannot be damaged by the materials, so that the composite flocculation algae inhibitor can be used as an emergency algae removal treatment agent for water body repair engineering,and can exert a long-acting algae inhibiting effect.
Owner:HUATIAN ENG & TECH CORP MCC

A kind of high hardness thermosetting self-healing polyurethane and preparation method thereof

ActiveCN110845692BImprove self-healing efficiencyHigh hardness transparentDisulfide bondingPolymer science
The invention provides a high-hardness thermosetting self-repairing polyurethane and a preparation method thereof. The technical scheme uses isocyanate-terminated polyurethane containing 2-hydroxyethyl disulfide as a functional group to cross-link and cure polyvinyl alcohol-grafted polycaprolactone to synthesize a thermosetting self-healing material with high self-healing efficiency and high hardness and transparency. Repair polyurethane. The invention realizes the self-healing of the material based on the disulfide bond exchange reaction, and provides a cross-linked network by grafting polycaprolactone with polyvinyl alcohol as a cross-linking agent, and the obtained material has excellent mechanical properties, high Young's modulus, and at the same time The material has good transparency, high self-healing efficiency, shape memory, reprocessing and other properties. In addition, the present invention also discloses a synthesis method of polyvinyl alcohol-grafted polycaprolactone. The polyvinyl alcohol-grafted polycaprolactone prepared by the method has multiple hydroxyl sites, which increases the interaction of hydrogen bonds between molecular chains. role, can provide a higher degree of chemical and physical cross-linking.
Owner:JIANGXI SCI & TECH NORMAL UNIV

Low-temperature manufacturing method of lithium ion battery negative material rutile-type titanium dioxide microsphere

The invention discloses a low-temperature manufacturing method of a lithium ion battery negative material rutile-type titanium dioxide microsphere, and belongs to the technical field of the manufacturing of a lithium ion battery negative material. The method comprises the following steps: (1) uniformly mixing tetrabutyl titanate, acetic acid and ethylene glycol according to the volume ratio of 1 to (5-20) to (2-15) so as to obtain a mixed solution to obtain a mixed solution; fully stirring the mixed solution uniformly so as to obtain a reaction precursor solution; (2) carrying out hydrothermal reaction on the reaction precursor solution at 120-220 DEG C for 10-24h, cooling and centrifuging; and (3) cleaning a centrifuged deposit and drying so as to obtain the rutile-type titanium dioxide microsphere. By manufacturing the titanium dioxide electrode material by virtue of a hydrothermal process, the method disclosed by the invention can be used for effectively avoiding phase transformation from anatase to rutile-type TiO2 and omitting a high-temperature solid-phase reaction process, and lithium titanate powder which is high in purity and good in crystallization is manufactured within a short time; and meanwhile, the manufacturing method by virtue of the hydrothermal method is simple in process, moderate in condition, free of special process equipment and easy in industrial production.
Owner:SHAANXI UNIV OF SCI & TECH
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