724results about How to "Uniform particle size distribution" patented technology

A method of producing hydrophobic metal nanoparticles using a hydrophobic solvent, having uniform particle size distribution and high yield rate to allow mass production; the metal nanoparticles thus produced; and conductive ink including the metal nanoparticles are disclosed. According to one aspect of the invention, a method of producing metal nanoparticles is provided, comprising dissociating a metal compound with an amine-based compound, and adding a hydrocarbon-based compound and either one of an alkanoic acid or a thiol-based compound to the dissociated metal ion solution.

The invention relates to a preparation method for preparing nano-scale oxidized zinc powder with high conductivity. The method simultaneously drip mixed salt solution of zincic soluble salt and doping elements such as aluminum, gallium, indium, Yt, scandium, tin, germanium, silicon, as well as precipitating agent into water, to generate coprecipitation to generate doped zinc bloom precursor basic zinc carbonate in condition of controlling temperature and PH value of entire reaction system, and at last, calcining the product in mixed gas atmospheres of hydrogen gas and argon gas, doped superfine zinc bloom conductive powder material can be obtained. The powder material prepared by the invention has small particle-size, uniform grain fineness distribution, and which mean particle diameter is about 10 to 80 nanometer. The electric volume resistivity of the powder can reach 2.5*10^-3 omega.cm, thus its electro conductivity is better than the sample prepared by plasma method and gas-phase method in current market. The preparation method further enhances whiteness degree and conductivity of the oxidized zinc powder, and further reduces the cost.

The invention provides a process of directly preparing a rare-earth compound from an extraction separation load organic phase. The process comprises following steps: carrying out a mixed precipitation reaction between a precipitator solution and the load organic phase which is obtained from extraction separation and contains rare-earth; post-treating the filter cake obtained by filtering slurry liquid so as to obtain the rare-earth compound with good dispersity and uniform particle size distribution; and returning the organic phase to the extraction separation working procedure for recycling use. The process of extracting and separating rare-earth omits the rare-earth stripping step, saves a great amount of acid needed by the rare-earth in a stripping load organic phase and solves the problems of stripping difficulty of medium-heavy rare-earth, high spent acid of a stripping solution, and the like. The invention uses the precipitator to precipitate the rare-earth from the organic phase, and the whole precipitation reaction is carried out on an oil-water interface to effectively control the grain size. Meanwhile, a trace organic phase is attached to grain surfaces and is used as a surface active agent to reduce the mutual adsorption action of grains for deflocculation. The invention can obtain products with good dispersity and uniform grain size distribution, thereby being a new method for preparing a high-quality rare-earth compound material. The invention has simple process, is easy to realize the industrialized production and has low production cost.

The invention relates to a core-shell structure cobalt-base catalyst of a middle distillate for synthesis gas preparation, which comprises the following components in percentage by weight: 5 to 30 percent of cobalt and 70 to 95 percent of silica. The catalyst has the following physical properties: the specific surface area is 200 to 1400m<2>/g, the pore volume is 0.5 to 1.3cm<3>/g, the average pore size is 2.0 to 18nm, the cobalt crystallite dimension is 12 to 25nm, and the particle size of the core-shell structure cobalt-base catalyst is less than 100nm, and cobaltosic oxide nano particles are coated in a mesoporous silicon shell to form a core-shell structure. The invention has the advantages of simple operation, high yield, high activity and high selectivity of the middle distillate.

The invention discloses a method for preparing a porous spherical Li(1-x)MxFe(1-y)Ny(PO4)([3+(alpha-1)x+(beta-2) y]/3)/C material, comprising the specific steps of: dissolving a lithium-containing compound, an iron-containing compound, a phosphor-containing compound and a element-doped compound additive in a dispersing agent to form a sizing agent; dispersing a mixture of a pore-forming agent, a cladding agent and a stabilizer in a dispersing agent through ultrasound, then adding into the sizing agent and mixing to form a new sizing agent; carrying out a physical method or a chemical method on the new sizing agent to obtain a sizing agent with the primary particles in nano grade; carrying out spraying drying and granulating on the obtained sizing agent with the primary particles in nano scale to obtain a dry mixed material with secondary particles with spherical appearances; then carrying out a sintering process on the dry mixed material to obtain the product of the invention. The method has the advantages that besides that the primary particles reach the nano scale, the particle diameters are more uniform in distribution and more regular in appearance, an iron phosphate product synthesized from the material has the particle diameters with uniform distribution, and the material has favorable processability, good electric conductivity, excellent power multiplication performance and higher actual capacity.

The invention relates to a hollow material with a composite structure of SiO2/TiO2 and a preparation method and application thereof. By applying hydrothermal reaction, glucose solution is carbonized at 160 to 200 DEG C to obtain carbon nanometer spheres with a particle size of 200nm to 1um; the carbon nanometer spheres are used as hard templates; hydrolysis of ethyl orthosilicate and tetrabutyl titanate are used for wrapping the SiO2 and TiO2 on the surfaces of the carbon spheres; the obtained product is annealed for an hour at the temperature of 450 to 500 DEG C; the carbon spheres are removed, and the hollow structure of silicon dioxide/titanium dioxide is obtained; then the obtained product is prepared into membranes with different layers by applying a czochralski method and a spin coating method respectively. The method is reasonable in design and simple in technology; besides, the hollow structure has even size-distribution and controllable particle size; the hollow silicon dioxide can remarkably improve the transmission rate of the membranes; the composite membranes are widely applied to fields such as windshields, various lenses and agricultural greenhouses.

The invention relates to an organosilicon-modified polyurethane-acrylic ester photocurable coating and a preparation method thereof. The photocurable coating comprises the following components in percentage by weight: 25 to 60 percent of polyurethane-acrylic ester, 20 to 55 percent of organic polysilane, 5 to 15 percent of solvent, 1 to 5 percent of photoinitiator and 0.05 to 4.5 percent of aid. The preparation method comprises the following steps of: weighing the organic polysilane according to the amount of a formula, putting into a container, sequentially adding a polyurethane-acrylic ester photocurable resin, the solvent and the aid, mixing uniformly, adding the photoinitiator, stirring uniformly to obtain an ultraviolet-photocurable coating, and preserving in a dark place. The ultraviolet-photocurable coating composition can be coated on base materials such as plastics, metals, glass and the like; a coating subjected to ultraviolet photocuring has excellent wear resistance and mechanical properties; and meanwhile, the coating has excellent adhesion, water resistance, salt fog resistance and alkali resistance.

The invention discloses a Co3O4 nanometer material for a supercapacitor and a preparation method thereof. The method comprises the following steps: on the basis of using cobalt nitrate as a raw material and a mixture of ethylene glycol and water as a solvent, adding a defined amount of glucose, placing the mixture in an autoclave to react at 120-200 DEG C for 10-25 hours, performing suction filtering, drying at 80 DEG C, calcining in a muffle furnace at 300 DEG C to obtain Co3O4 sea urchin-shaped conjoined spheres which have the diameter of 7-15mu m and are of a three-dimensional hierarchical structure. The Co3O4 nanometer material and the preparation method have the characteristics that the operation method is simple, the yield is high, and the product has the three-dimensional hierarchical structure and superior electrochemical performance. The prepared Co3O4 spheres with the three-dimensional hierarchical structure have the characteristics that the stability is higher, the particle size distribution is uniform, the dispersibility is good, the spheres are difficult in agglomeration and pores with the three-dimensional structure are beneficial to the diffusion of the electrolyte, thus the material can be widely applied in the fields of catalysis, lithium batteries and supercapacitors.

The invention relates to a preparation method of doped carbon nitride fluorescent quantum dots.According to the preparation method, melamine and compounds corresponding to doped atoms serve as raw materials, while melamine molecules are roasted to form a carbon nitride structure, the doped atoms enter the carbon nitride structure through a chemical reaction, a doped carbon nitride block material is formed, and the block material is subjected to ultrasound crushing in an alcohol solvent to prepare the doped carbon nitride fluorescent quantum dots which are uniform in quantum size and grain size.The dried quantum dots are good in water solubility and dispersibility and have high fluorescent quantum dot yield.The method can be used for preparing the doped carbon nitride quantum dots in batches, the synthesis method is simple, and repeatability is good.The synthesized quantum dots have wide application prospects in the fields of fluorescence detection, light-emitting devices, biological marking and the like.

The invention relates to a method for synthesizing ultrafine calcium carbonate by utilizing carbide slag. The method comprises the following steps of: (1) dissolving carbide slag: uniformly mixing carbide slag with water in a ratio of (1:6)-(1:20) to ensure that the carbide slag is fully dissolved into a turbid liquid, wherein the water content of the carbide slag is 20-45%; (2) carrying out impregnation reaction: adding ammonium chloride into the turbid liquid of the carbide slag for uniformly mixing, wherein the mass ratio of carbide slag to ammonium chloride is (1:0.7)-(1:2.5), after the impregnation reaction is finished, filtering and removing the slag to obtain a clear calcium chloride solution; and (3) carrying out carbonization reaction: adding a crystal form control agent into a calcium chloride solution for fully dissolving, introducing CO2 into the solution to carry out carbonization reaction till the pH (potential of Hydrogen) value of the reaction solution is less than or equal to 7 to obtain ultrafine calcium carbonate slurry, wherein the crystal form control agent is one or more than two mixtures of sulfate, chloride, citrate, sodium dodecyl benzene sulfonate, pyrophosphate, oleic acid, ammonium citrate, N-methyl pyrrolidone and maleic acid.

The invention discloses a macromolecular microcarrier and a preparation method thereof, belonging to the technical field of biomedicine. The preparation method comprises the following steps of: splitting a silk solution and a drug solution into micrometer grade liquid drops with core-shell structures under the action of a high-voltage electric field by adopting a coaxial high-voltage electrostatic technology and a freeze drying method; concreting through liquid nitrogen, and then preparing the microcarrier which is difficult to dissolve in water through freeze drying. The microcarrier is in the shape of a microsphere with the core-shell structure, and the diameter of the microsphere is 100-500 micrometers; the shell of the microcarrier comprises the components of silk fibroin; the random-coil conformation of silk fibroin molecules is 80-90 percent; the shell is in a porous structure, and an aperture is 5-20 micrometers; and a core of the microcarrier comprises the components of water-soluble drugs. The silk microcarrier has extensive application prospect in the fields of cell culture, drug release, and the like.

The invention belongs to the technical field of functional material and particularly relates to a magnetic mesoporous titanium dioxide core-shell type compound microsphere as well as a preparation method and applications thereof. The core-shell type compound microsphere takes a ferroferric oxide nano particle cluster as the core and takes mesoporous titanium dioxide with high crystallinity as the shell. The preparation method comprises the following steps: firstly, preparing the ferroferric oxide nano particle cluster with stable citric acid, secondly, wrapping the surface of the cluster with an amorphous titanium dioxide shell through a sol-gel method, and finally, obtaining the magnetic mesoporous titanium dioxide core-shell type compound microsphere through hydro-thermal treatment. By being provided with the mesoporous titanium dioxide shell with high crystallinity, the compound microsphere has the characteristics of high selectivity, high enrichment capacity, high sensitivity and high recovery rate to phosphoeptide; and since a magnetic core exists, the microsphere enriched in phosphoeptide can be separated by magnetism quickly and very conveniently. The method provided by the invention has the advantages that the operation is simple, the process is controllable, and the prepared compound microsphere can be used for analyzing and identifying phosphoeptide with ultra low concentration in a biological sample.

The present invention provides a magnetic mono-component toner which can suppress a selection development on a latent image carrier and can maintain favorable image properties for a long period by using a toner having the coarse powder distribution (S) within a given range in a jumping developing method and an image forming method which uses the toner. In the toner used in the jumping developing method which develops an electrostatic latent image formed on a latent image carrier using a developer carrier, the toner includes toner particles which contain at least a binding resin and a magnetic powder, and the coarse powder distribution (S) of the toner particles satisfies a following formula (1).

Coarse powder distribution (S)=(50−A)/2≧17(volume %/μm)   (1)

(wherein, A is a volume % of the coarse powder having particle sizes larger than D₅₀ based on volume by 2 μm or more)

The invention provides a beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent. The beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent is prepared through a lay-by-lay assembling method. The beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent has good stability, good dissolvability and strong adsorption capability. The beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent has strong effects of adsorbing azo dyes such as methylene blue, methylene red and the like in waste water. The invention also provides a method for removing methylene blue in waste water. The method comprises the following steps of putting the beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent into an aqueous solution containing methylene blue, adjusting a pH value of the reaction system to a pH value of 7 to 8, carrying out ultrasonic dispersion for 0.5 to 1 hour, carrying out oscillation for 8 to 10 hours, and separating out precipitates by a permanent magnet. The method for removing methylene blue in waste water has the advantages of good adsorption effects, mild reaction, simple processes, simplification of solid-liquid separation, less secondary pollution and good feasibility for large-scale application.

The invention discloses a method of making high-quality rutile titanium white powder by a method of improving sulphuric acid by crystal phase control, and its characteristic: after bleaching, adding rutile to burn crystal seeds, using deionized water to make metatitantic acid qualified by potching into metatitantic acid pulp, then adding in salt processing agent composed of K, P and Al compound crystal phase control preparations, burning and transforming the metatitantic acid at 800-1050 deg.C, so as to make primary product of rutile titanium white powder; it remarkably improves the quality of rutile titanium white powder, largely enhances application property of finished pigment, unitedly harmonizes the contradictory relations between decoloring force, conversion and whiteness, and makes the conversion quality of burnt products more stable, the particle size distribution more uniform, especially applied to after-processing.

The invention discloses a method for preparing a hollow ball of sulfide and oxide of nickel. The method comprises the following steps: (1), adopting ultrasonic or mechanical stirring to disperse nickel nitrate, L-cysteine and urea uniformly in deionized water; (2), transferring the mixed liquid into a reaction kettle, and reacting for 8 to 48 hours at a temperature of 140 DEG C to obtain a nickel disulphide hollow ball; (3), calcinating nickel disulphide at different temperatures to obtain hollow balls of nickel monosulfide and nickel oxide respectively; and (4), under hydrothermal condition, reacting nickel disulphide with selenium source and tellurium source respectively for 4 to 48 hours at a temperature of 140 DEG C to obtain hollow balls of nickel diselenide and nickel telluride. According to the method, raw materials are cheap, easy to obtain, and convenient to compound; the required devices are simple; no pollution is caused in the production process; and the large scale production can be realized rapidly.

This invention involves a preparation method for chromium oxide with chromium salt as raw materials and reducing gas as a reductant. Said method comprises carrying out reaction of chromium salt with superfluous reducing gas at 300~850DEG C for 0.5-3 h and cooling to obtain a reaction mixture, washing the mixture and drying, and calcining at 400~1100DEG C for 1-3 h to obtain the ultrafine chromium oxide powders, wherein the chromium salt is chromate or dichromate, and the reducing gas is hydrogen, natural gas, gas or their mixtures. Compared with existing technologies, this invention has the advantages of simple production process and being easy for industrialization. The obtained chromium oxide has high purity, uniform particle size distribution and small particle size. The whole process does not produce containing chromium-containing waste, and is environmental friendly. The reaction by-product can be reused, which greatly reduces the cost of production. Low reaction temperature greatly reduces the reaction energy.

The invention relates to a manufacturing method for tempering cellulose fiber with intelligent tempering performance, characterized in that microcapsule grout of phase change energy storage materials with the weight of 10-230% of the fiber is put into the fiber stock solution of cellulose so as to form spinning dope by even mixture, which enters into the dilute caustic soda solution and dilute sulfate in turn to form the fiber; tempering cellulose fiber is formed by dilute acid decoppering, washing and drying. It is provided with simple process, low manufacturing cost and wide applicable range. The tempering cellulose fiber has the base material of cellulose fiber and the functional additive material of microcapsule of phase changer energy storage materials. The phase change energy storage materials are not easy to leak and is provided with good heat stability and tempering effect. When it is applied in down-proof fabric and duvay the phase change energy storage materials can strengthen the tempering performance.

A preparation method of nanospheres with core-shell structure having a shell of silicon dioxide belongs to the nanometer material technology field and comprises the steps of: (1)dispersing magnetic particle or aggregate of magnetic particle and quantum dot particle into alkaline water solution; (2) solving the surface active agent into non-polar solvent; (3)mixing the solution obtained from step (1) with the solution obtained from step (2) with a volume ratio of 1:1000-1:1, and obtaining emulsion or microemulsion by ultrasound or vortex mixing method; (4)adding tetraethoxysilane into emulsion or microemulsion and agitating, wherein, the volume of tetraethoxysilane occupies 0.1~10% of the emulsion volume; (5)centrifuge washing and drying. The nanosphere of the present invention has magnetic response property, or has magnetic response property and photoluminescent property synchronously, and has uniform grain size, besides the preparation method is simple.

The invention relates to a method for preparing a porous carbon ball composite absorbing material loaded with a magnetic metal element. The method includes the steps of 1] preparing a precursor solution containing magnetic metal ion salt; 2] placing porous carbon balls into the precursor solution for stirring and dipping; 3] filtering, then washing and drying the porous carbon balls; 4] calcining the dried porous carbon balls in an inert atmosphere; and 5] cooling to room temperature in the inert atmosphere and then obtaining a porous carbon ball composite absorbing material loaded with a magnetic metal element. The invention makes use of the high specific surface area and the strong adsorption of the porous carbon balls, introduces the precursor solution containing magnetic metal ion salt including cobalt salt, nickel salt and the like into channels of the carbon balls by capillary action, combines with hydrophilic oxygen-containing functional groups, and obtains the porous carbon ball composite absorbing material loaded with the magnetic metal element like cobalt or nickel through drying and sintering in the inert atmosphere. The whole preparation process is simple in technique, convenient to operate, and less demanding on production equipment.

The invention relates to a method for preparing a load type high-dispersion multi-component precious metal nanoparticle catalyst. The method comprises the steps of 1) under inert atmosphere, uniformly stirring a solvent and a surface active agent, then adding a precious metal precursor solution, rising the temperature, reacting for a certain period of time, cooling to the room temperature, adding normal hexane, and performing extraction layering; 2) uniformly mixing the obtained upper layer nanoparticle solution with a carrier, and stirring or performing ultrasonic treatment; and 3) centrifugating, washing and drying or baking the mixed solution to obtain the catalyst. For the precious metal catalyst, even under a relatively high carrying amount, relatively good precious metal nanoparticle dispersion degree can be still guaranteed; the particle sizes of the particles are uniformly distributed; the precious metal carrying amount is controlled easily and accurately; the particle sizes and the components of multi-component particles can be controlled; and the catalysis application range is wide. The process is simple; the preparation cost is low; the applicability is high; and load-type high-dispersion precious metal and the multi-component precious metal nanoparticle catalyst can be prepared in a large scale.

The invention provides a preparation method of lithium-nickel-cobalt-aluminum oxide for anode materials of lithium ion batteries. The method comprises: step 1, using a nickel-cobalt-aluminum precursor prepared through a coprecipitation method and doped with mixed ions as raw materials, putting the raw materials into a sealed hearth of a pressure furnace, continuously introducing oxygen until a fixed pressure value is formed, then heating to a pre-burning temperature and keeping warm for a period of time, and cooling to obtain an oxidized precursor; and step 2, adding measured lithium salt or lithium hydroxide into the oxidized precursor, ball milling and uniformly mixing; heating the uniformly mixed raw materials to a certain temperature and keeping warm for a period of time, and meanwhile continuously introducing oxygen to complete a sintering process, thereby obtaining the finish product. According to the invention, through a hyperbaric oxygen atmosphere, the oxygen are enabled to fully infiltrate into particles of the raw materials which has a certain accumulation thickness, thereby preventing situations that only surface materials are oxidized under a normal pressure, and ensuring a full conversion of Ni<2+> to Ni<3+> by a full pre-oxidation.

The invention discloses a method for preparing nanoscale zero-valent iron and nanoscale Cu/Fe particles. The method comprises the steps of dropwise adding KBH4 or NaBH4 aqueous solution into soluble ferrite aqueous solution under the condition of adopting ultrasonication and continuously stirring with nitrogen introduction, wherein the amount of substance ratio between KBH4 or NaBH4 and soluble ferrite substances is 2-4:1; continuously stirring after dripping, completely reacting to acquire nanoscale zero-valent iron particles; separating, washing and storing; adding CuSO4 or CuCl2 aqueous solution into the nanoscale zero-valent iron particles, wherein the amount of substance ratio between CuSO4 or CuCl2 and the soluble ferrite substances is 1:11-19; stirring and reacting to prepare nanoscale Cu/Fe particles. The high-dispersing type nanoscale zero-valent iron and nanoscale duplex metal Cu/Fe prepared by the method can be used for simultaneously repairing chlorinated organic compounds, nitrate and heavy metal polluted water. The preparation method is simple, and rapid in speed; through the cavatition effect of ultrasonic wave, the dispersion is completely accelerated, and the agglomeration is reduced; the high-dispersing type nanoscale zero-valent iron and nanoscale duplex metal Cu/Fe with smaller grain size, larger specific surface area and higher reactivity can be prepared.

The invention discloses a method for synthesizing quantum dots with uniform size distribution in an aqueous phase, which comprises the following steps: firstly, dissolving amphiphilic high polymers of different varieties into water so as to form regular micelles when the concentration of the high polymers in the aqueous phase is higher than the critical concentration of the high polymers; and reacting a cadmium sulfydryl composite precursor with NaHSe, NaHTe and Na2S or a thiourea precursor in pore paths of the formed micelles to synthetize quantum dots such as CdS, CdSe, CdTe and the like, and forming the quantum dots with the uniform size distribution by utilizing condensation reflux or the growth of the quantum dots in a hydrothermal reaction kettle. The quantum dots synthesized in the aqueous phase completely are good in water-solubility, and thus the quantum dots can be widely applied in biological aspects and can be widely applied to biomarkers, biological labels and probes; and in addition, the quantum dots with the uniform size distribution have excellent monochromaticity of transmitted fluorescence, wide absorption and narrow and adjustable transmitting positions.

A process for preparing the superfine alloy powder by codeposition-coreduction method includes such steps as liquid-phase codeposition to prepare the precursor powder of each component in alloy, calcining to obtain nano-class composite metallic oxide powder, and reducing by H2 or decomposed ammonia in tubular reducing furnace while alloying to obtain superfine alloy powder.

The invention relates to the field of fluorescence carbon nanomaterials, in particular to a high-quantum-yield eigenstate-fluorescence-adjustable carbon dot and a preparing method and application thereof. Diaminonaphthalene or a hydroxyl, carboxyl, methyl, ethyl, N,N-dimethyl and N,N-diethyl substituted ramification of the diaminonaphthalene and citric acid serve as carbon source precursors, an eigenstate fluorescence carbon dot solution can be obtained through a solvothermal method. The prepared eigenstate fluorescence carbon dot has the beneficial effects of being high in crystallization, high in surface passivation degree, even in nitrogen doping, even in size distribution and the like, and has the wide application prospect.

The invention, which belongs to the technical field of lithium ion battery cathode materials, discloses a porous carbon in situ composite lithium iron phosphate cathode material and a preparation method thereof. A synthetic process mainly comprises the following steps: dispersing porous carbon; compositing a precursor FePO4.2H2O/porous carbon, and synthesizing the product of the porous carbon in situ coating lithium iron phosphate cathode material. The porous carbon in situ composite lithium iron phosphate cathode material comprises 0.5 to 15 wt% of the porous carbon, 85 to 99.5 wt% of lithium iron phosphate, and 0 to 10 wt% of residual carbon obtained after organic carbon source pyrolysis. Most lithium iron phosphate particles are restricted in the inner of pores of carbon through in situ coating, so obtained composite cathode material particles have small diameters and a good uniformity. Carbon walls of porous carbon allow uniform coating of the lithium iron phosphate particles to be realized and simultaneously particle agglomeration to be largely reduced. The porous carbon in situ composite lithium iron phosphate cathode material has the advantages of good charge-discharge performance, stable circular property, rate capability, novelty, simple synthetic technology and easy large-scale production.

The invention discloses a method for preparing monodisperse carbon microspheres by using cane sugar as a carbon source. According to the method, cane sugar is used as the silicon source, sodium polyacrylate is used as a dispersing agent, and after the hydrothermal reaction at the certain temperature, the monodisperse micron-sized carbon sphere is obtained. A one-step hydrothermal method is adopted in the method for preparing the monodisperse carbon microspheres, and sodium polyacrylate is used as a dispersing agent, and has an important effect on the particle diameter, the dispersity and the surface appearance of the carbon microspheres; the carbon microspheres are solid and have relatively rough surfaces, and can obtain lots of aperture passages through simple high temperature processing; the obtained carbon sphere particle diameter range is 1-6 microns, and the carbon sphere particle diameter can be adjusted controllably through experimental parameters such as cane sugar concentration, the reaction temperature and the reaction time; the obtained carbon sphere can be applied to the fields of liquid chromatograph stationary phases, super capacitors, protein separation, enrichment and removal of organic matter in water, and the like.

The invention belongs to the field of a lithium ion battery material, in particular relates to a preparation method of a spherical layer-structured anode material externally coated with a nanocrystalline metal oxide for a lithium ion battery. The layer-structured anode material has the following chemical formula: LiNixMnYCo<1-x-y)O2, wherein x is more than or equal to zero and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 0.5. The preparation method has the key points of: preparing the spherical layer-structured anode material by a coprecipitation method of carbonate; mixing a small amount of nanocrystalline metal oxide powder at a wet state, and stirring until a solvent is completely volatilized; and calcining a mixed material again, and obtaining the spherical layered material coated with the nanocrystalline metal oxide. The coating process is simple, the distribution of a coating layer is more uniform, product consistence is good, the prepared material is spherical particles with uniform grain sizes and has high tap density and volume energy density, and the cycle performance at high voltage, the high-temperature cycle performance and rate capability are enhanced and improved to some extent.

The present invention discloses a matte glaze ink for ceramic jet printing and preparation method thereof, wherein the ink comprises, based on the mass percentage, 30-50% of matte glaze, 3-8% of resin, 2-10% of dispersant, 0.1-0.2% of leveling agent, 0.3-0.6% of defoaming agent, 0.08-0.12% of anti-settling agent and the balance for the solvent, wherein the matte glaze includes raw materials of the following components of SiO2, Al2O3, K2O, Na2O, CaO, MgO, ZnO and BaO. Matte glaze ink prepared by the invention has low viscosity, uniform distribution of particle diameter with maximum particle diameter of less than 1Mum and good printing performance. Fired glaze owns gentle matte finish.