308 results about "Powder suspension" patented technology

The invention discloses a preparation method and application of hierarchical porous bioactive ceramic. The preparation method comprises the following steps: mixing a binding agent, plasticizer and solvent to obtain an additive emulsion; adding a pore forming agent into the additive emulsion, and mixing to obtain a pore forming agent viscous liquid; adding bioactive powder into the pore forming agent viscous liquid, compounding, and aging to obtain high-plasticity mud pies; and performing extrusion molding on the mud pies, drying, sintering to obtain honeycombed hierarchical porous bioactive ceramic, grouting with a bioactive powder suspension to regulate the size and shape of pores, drying again, and firing to finally obtain the bioactive ceramic having a hierarchical pore size structure and a non-acute pore shape. According to the invention, the preparation method is simple; industrial production can be realized; and the hierarchical porous bioactive ceramic having the advantages of high porosity, favorable mechanical property, satisfactory connectivity and the like can be prepared and is an ideal bone defect repair material.

A metallic wire screen skeleton material-carried nm-clas cystol TiO2 photocatalyst is prepared through preparing transistion layer sol from n-butyl titanate as precursor, preparing active layer sol from n-butyl titanium or TiCl4 and pore-forming agent, coating the transition layer sol on the cleaned metallic wire screen skeleton-shaped carrier, directly coating the active layer sol, drying and calcining; or preparing nm TiO2 powder suspension, and attaching it the said carrier to form the photocatalyst. Its advantages include high adhesion, low gas resistance and high photocatalytic efficiency and activity.

The invention relates to a method for preparing compact silver-coated copper powder by using the one-pot method. The silver-coated copper powder is in a coated core-shell structure, a core layer is made of copper, and a shell layer is made of silver. The preparation method includes: adding ammoniacal copper solution prepared by copper sulfate into aqueous solution containing reducing agent and dispersing agent to obtain copper powder suspension; adding water-soluble organic chelating agent into the suspension containing copper powder; adding ammoniacal silver solution prepared by silver nitrate into the suspension containing the copper powder to enable silver ions and the copper powder to be in a displacement reaction; after the displacement reaction finishes, additionally adding a certain amount of weak reducing agent to restore residual silver ions into silver; and filtering, washing and drying to obtain silver-coated copper powder with different grain diameters of 0.8-5 micrometers. The obtained silver-coated copper powder is uniform in silver coating of the shell layer, compact, good in conductivity, high in high-temperature oxidation resistance, and capable of being used for preparation of various electrode slurry sintered in the air.

The invention relates to a method and a system for preparing activated coal gangue, and belongs to the field of the cement industry. A coal gangue material is calcined in a heat source, and then the activated coal gangue is obtained by cooling and discharging the calcined coal gangue material by a multistage cyclone, wherein the heat source is high-temperature flue gas continuously discharged during cement production, then the high-temperature airflow is introduced into a calcination furnace to make the preheated coal gangue material calcined in a powder suspension state. The method makes full use of the stable heat source to quickly preheat and calcine the coal gangue and fully decompose limestone at the same time to achieve the aim of increasing calcium activity, forms the high pozzolanicity coal gangue with stable heat source supply, low cost, high production efficiency of the activated coal gangue and high utilization rate of the heat source, can remarkably improves pozzolanicity of the coal gangue, and provide a novel solving means for comprehensive utilization of industrial waste residue.

The invention provides a cooling liquid for diamond-wire cutting equipment, and a preparation method thereof. The cooling liquid consists of: 2.5 wt%-90 wt% of deionized water, 2 wt%-86 wt% of diethylene glycol, 0.1 wt%-10 wt% of polyethylene glycol with an average molecular weight of 100-2000, 1 wt% -30 wt% of a dispersant, 0.01 wt% -10 wt% of a chelating agent, 0.1 wt% -10 wt% of a metal corrosion inhibitor and 0.01 wt% -5 wt% of an antifoaming agent. The preparation method comprises: successively adding the chelating agent, the metal corrosion inhibitor and the antifoaming agent into deionized water according to the ratio, uniformly stirring; and then adding diethylene glycol, the dispersant and polyethylene glycol, stirring for 6-8 hours to prepare the cooling liquid for the diamond-wire cutting equipment. The cooling liquid for the diamond-wire cutting equipment has the characteristics of good cooling effect, moderate silicon-powder suspension capability, low viscosity, few foams and low corrosivity, and is simple in manufacture and low in cost.

The invention provides a method for preparing straw cellulose nano crystal whisker. The method is characterized by comprising the steps: utilizing crop straws as raw materials, performing pretreatment and cellulose purifying treatment, mechanically grinding into straw cellulose powder; performing DMSO (Dimethylsulfoxide) treatment and TEMPO (Tetramethylpiperidine) oxidation treatment and stirring at high speed, thereby obtaining straw cellulose powder suspension liquid; performing centrifugal treatment, decentralized treatment and freezing and drying, thereby obtaining straw cellulose nano crystal whisker. The preparation process is simple and has high yield and low energy consumption; no toxic and harmful matters are discharged during production and the preparation process has a capability of large-scale promotion and application; utilized straws can be wastes of plant crops such as rice straws, wheat straws and oilseed rape straws; the raw material has wide source and cost is low; pollution to the environment is solved and additional value of straws is improved.

The invention belongs to the field of solid oxide fuel cells and particularly relates to a solid oxide fuel cell composite cathode and a preparation method thereof, wherein the solid oxide fuel cell composite cathode has a high electrochemistry performance and is stable in long-time operation. The preparation method includes the following steps of step one, preparing a three-dimensional porous skeleton made of electrolytic materials at a high temperature; step two, preparing a powder suspension or a nitrate solution of a cathode material; step three, impregnating the powder suspension or the nitrate solution into the porous skeleton and then calcinating the porous skeleton; step four, repeating the operation of the step 3 for a plurality of times until the impregnating quantity reaches the requirement; step five, performing high temperature sintering under an air atmosphere to obtain the three-dimensional composite cathode with a core-shell structure. According to the solid oxide fuel cell composite cathode and the preparation method thereof, the process is simple, expensive experiment apparatuses are not required, the obtained composite cathode is of the core-shell structure, a core is the electrolytic skeleton, a shell is a phase reaction layer with a stable nano thin film structure, and the problem that the performance is attenuated due to the fact that nano particles of the solid oxide fuel cell composite cathode prepared by an impregnating method are low in stability and easy to sinter is solved.

A process for carrying TiO2 photocatalyst on metal surface includes such steps as cleaning metal surface, anodizing in acidic medium, hydrolyzing, leaching and coating tetrabutyl titanate and TiO2 film under the weak alkaline condition by the sol-gel-powder suspension method, and igniting at proper temp. Its advantages are strong photocatalysis action for degradating organic pollutants, and good electric conductivity and machinability.

The invention discloses a barium sulfate-based superfine functional powder material subjected to surface modification. The material is prepared by surface modification of barium sulfate powder suspension through a finishing agent, wherein the finishing agent is stearate, silicate, an organic complexing agent or a coupling agent provided with functional groups, and the particle diameter of barium sulfate powder is between 100 namometers and 2 mu m. The preparation method for the material comprises the following steps: barium sulfate, a sulfuric acid solution and a dusting agent perform synthesis reaction, and the barium sulfate powder suspension obtained after reaction is subjected to slaking, separation, washing, slurrying, surface modification and drying to obtain a finished product, wherein the dusting agent is sulfate, phosphate, silica sol, organic complexing agent or sodium polyethylene. The powder material has the advantages of small particle diameter, strong functionality, low cost and so on, and the preparation method has the advantages of small investment, low energy consumption, simple technology, no pollution, superior product performance and so on.

This invention is alumina diolame phosphor powder; it is coated of Al2O3 on phosphor powder surface. Its coating method is that buffer solution is made-up by conjugate acid-base system eith Ph value is between 4.5~6.0, and its concentration is between 0.1M and 2M. Concentration is 0.01~1.0M water soluble aluminium salt solution is made-up by Al2O3 and phosphor powder and equal quality water soluble aluminium salt, the weight ratio of Al2O3 and phosphor powder is (0.25~20):100. Phosphor powder is added into buffer solution to make-up water soluble aluminium salt of 0.0.1~1.0M concentration. It is agitated and ultra sonic dispersed to make phosphor powder disperse in buffer solution. The phosphor powder suspension is heated to 20~600C, and agitated at speed of 100r/m~300r/m, then water soluble aluminium salt is added into suspension, dropwise velocity is 5~500ml/min. The temperature is holding and agitated for 30~120min. Finally, mother liquor is adjusted by alkali solution to pH value is 6~7, then alumina hydrate is got. alumina diolame phosphor powder is got after separation, water washing, dehydration, and is dried at 60~1200C to make water content of phosphor powder is low of 0.25%, and ignited 1~3hours at 200~4000C and air cooling in stove.

The invention relates to a toning lotion containing a pearl water extract and a preparation method. The preparation method comprises the following steps of: preparing a pearl powder extract through carrying out high-pressure homogenization, membrane filtration and separation on a pearl powder suspension by combining modern scientific technologies and traditional processes and adopting a purified water boiling method; and mixing and homogenizing the pearl water extract with butanediol, propylene glycol, glycerin, hyaluronic acid, sodium, flavor, and the like to prepare a pearl toning lotion containing the pearl water extract. The invention overcomes the defects brought by acid hydrolysis and enzymatic hydrolysis in the prior art, pearl liquid extracted by using the method provided by the invention contains 18 kinds of amino acids in total, and the active ingredients can be stored in hydrolysates in a stable and homogeneous state. A chemical reagent is scarcely added in the process for preparing the pearl water extract by using the method provided by the invention, trace elements, i.e. natural pearl active ingredients, can be fully extracted without harming skin, and filter residuesobtained after extracting the pearl water extract can be used as natural raw materials for a calcium-supplementing preparation so as to gain multiple advantages by a single substance.

The invention discloses a boron nitride nanosheet-reinforced ceramic-based composite material and a preparation method thereof. A boron nitride nanosheet is taken as a reinforced phase, and ceramic is taken as matrix. The method comprises the steps of firstly loading the boron nitride nanosheet and ceramic powder into a container separately, and obtaining evenly dispersed suspension liquids through high-speed mixing matched with ultrasonic treatment; adjusting the pH values of two suspension liquids to a certain range, dropwise adding the boron nitride nanosheet suspension liquid into the ceramic powder suspension liquid, and carrying out standing, precipitation, suction filtration and drying to obtain mixed powder; then, putting the mixed powder into a graphite jig, carrying out hot-pressed sintering in a multifunctional sintering furnace, carrying out heat preservation for a period of time and stopping heating; and naturally cooling to a room temperature in the furnace to obtain a finished product. The method has good effects that the preparation method is simple, the product performance is good, the cost is relatively low, massive production is easy to achieve, and the obtained boron nitride nanosheet-reinforced ceramic-based composite material has excellent mechanical properties and high-temperature stability.

The invention discloses a preparation method for peanut bioactive peptide. The method comprises the following steps: adding peanut protein powder to distilled water, carrying out stirring, followed by standing and microwave treatment to obtain peanut protein powder suspension liquid; adjusting a pH value of the peanut protein powder suspension liquid through a hydrochloric acid solution, then adding compound plant hydrolase Viscozyme L, followed by carrying out the microwave treatment to secondarily carry out enzymolysis to obtain a enzymatic hydrolysate, then killing the enzymes and carryingout cooling to a room temperature; adjusting a pH value of the enzymatic hydrolysate through a sodium hydroxide solution or the hydrochloric acid solution, then adding protease and carrying out the microwave treatment to secondarily carry out the enzymolysis, then killing the protease and carrying out cooling to the room temperature, followed by carrying out centrifugating and freeze drying to obtain the peanut bioactive peptide. The prepared peanut bioactive peptide product provided by the present invention has functional properties of high dissolubility, high emulsibility, strong foamability, good emulsion stability, good foam stability and the like. In addition, the method provided by the present invention is applicable for the industrial production.

The invention relates to a preparation method of waterproof fluorescent powder, which comprises the following steps: coating a SiO2 inorganic oxide film on the surface of aluminate long afterglow fluorescent powder the chemical reaction formula of which is that Na2SiO3+2HNO3=H2SiO3+2NaNO3, and carrying out the reaction in an anhydrous system. A coating process comprises the following steps: 1. uniformly dispersing the long afterglow fluorescent powder into glycol to prepare a fluorescent powder suspension with the concentration of 1-10g/100ml; 2. weighing a relevant amount of NaSiO3* 9H2O according to the proportion by weight of SiO2 to the fluorescent powder as (0.5-15):100, and adding the NaSiO3*9H2O into the fluorescent powder suspension; 3. heating the suspension to reach the temperature of 60-90 DEG C, controlling the temperature at the interval, and stirring; 4. preparing an absolute alcohol solution of HNO3, and dropwise adding the solution in the fluorescent powder suspension to obtain a coating film fluorescent powder suspension; and 5. centrifugalizing the coating film fluorescent powder suspension, then washing with ethanol for 1-3 times, fully drying, then burning at the temperature of 200-400 DEG C for 1-3 hours, and obtaining the coating film long afterglow fluorescent powder after cooling.

A process for manufacturing milk chocolate products containing a higher than normal water content by preparing a dark chocolate containing up to 30% by weight of water, adding a milk powder suspension optionally together with seed crystals of cocoa butter or cocoa butter equivalent, and mixing under low shear. The invention also relates to high water content milk chocolate products, methods of preparing a chocolate coated ice cream article with such products and to the resulting chocolate coated ice cream articles.

The invention discloses a preparation method and application of a chitosan-shell powder compound adsorbent. The preparation method mainly comprises the following steps: (1) calcining shells without meat at low temperature, and crushing to obtain shell powder; (2) mixing the shell powder with water to prepare suspension liquid; (3) mixing chitosan with dilute acid to prepare a chitosan solution; (4) dropwise adding the chitosan solution into the shell powder suspension liquid while stirring at high speed so as to enable the chitosan to be separated out at the surface of the shell powder; (5) filtering with bolting cloth, and then washing material, obtained by filtering, with water; (6) drying, and grinding to obtain the chitosan-shell powder compound adsorbent. The preparation method provided by the invention is wide in material source, simple in technology and mild in operation conditions; the prepared adsorbent has excellent adsorption performance for Congo red dye, and is low in cost and environment-friendly, thus having good economic and social benefits.