47results about How to "Small median diameter" patented technology

The invention discloses a preparation method of jade polishing powder. The method is characterized by comprising the steps of feeding 12-26% of cerium chloride and 20-32% of zirconium oxychloride into a reactor according to the mass percent concentration, and dissolving the mixture in water; then, feeding 15-30% of aluminium oxide, 8-15% of silicon nitride, 2-6% of chromic oxide and 0.5-3% of dispersing agent into the water solution, and stirring to obtain slurry; dissolving 15-30% of ammonium oxalate into water, and then feeding the product into the slurry, wherein the sum of the content of all the components except water of the slurry is 100%; stirring under the normal pressure, heating up to 85 DEG C, and carrying out a reaction for 30-36h; then, heating up to 120 DEG C, and carrying out the reaction for 2-4h; carrying out calcination for 2-4h at the temperature of 950-1000 DEG C, cooling and crushing by airflow to obtain the jade polishing powder. The preparation technology is simple, easy in control of conditions, low in production cost and easy in industrial production. When being used for the polishing process, the polishing powder is good in powder polishing effect, high in glossiness, free from scratch, high in flatness and less in power dosage.

The invention discloses a preparation method of 3D printing rapid prototyping inorganic powder material, which is characterized in that the method comprises: adding vinyltriethoxysilane: 8% to 22% in a grinding machine according to the mass percentage concentration, Add inorganic powder materials: 78%~92%, turn on the grinder at 200 rpm, grind at room temperature for 4~6? h, to obtain the pretreated inorganic powder material; then in the grinder, add the pretreated inorganic powder material according to the mass percentage concentration: 85%~96%, add EVA hot melt adhesive powder: 4%~15%, and turn on the grinder speed At 200 rpm, grind 4~6 at room temperature? h, The obtained 3D printing rapid prototyping inorganic powder material. The preparation process is simple, the conditions are easy to control, the production cost is low, and the industrial production is easy. The material does not need to be sprayed with adhesive, and can be directly formed by heating at 140-180°C and pressure within the range of 2MPa-6MPa, and the forming operation is simple.

The invention discloses a preparation method for regenerating rear-earth polishing powder. The preparation method comprises the following processes: (1) mixing the waste rear-earth polishing powder and adopting a shaker reselecting device for reselecting and separating to obtain heavy constituents; (2) treating the reselected rear-earth polishing powder by 2%-25% (in percentage by weight) of ammonium fluozirconate aqueous solution; heating up to 50 DEG C to 75 DEG C; stirring and reacting for 6-12 hours; and settling, cleaning and filtering to recycle solid; and (3) preparing regenerated rear-earth polishing powder, wherein the primarily generated rear-earth polishing powder is primarily dried, roasted for 3-10 hours at 1000 DEG C to 1100 DEG C, cooled, crushed by gas flow to obtain the regenerated rear-earth polishing powder which can reach a grain size range for being reused as the polishing powder. The preparation method for regenerating rear-earth polishing powder has the advantages of being less in using amount of chemical substances, simple in process, easy to control conditions, low in production cost, easy to realize industrial production, high in recovery rate, good in powder polishing effect and the like.

The invention discloses a method for preparing polishing powder for onyx polishing, which is characterized in that the method has the following process steps: in the reactor, add according to the following composition mass percentage concentration, lead powder: 5-8% , compound: 80~88%, tin oxide: 5~13%, the sum of each component is 100%, turn on the grinder, grind at a speed of 500 rpm for 30~60min, and obtain agate polishing powder, in which the compound Contains nano aluminum nitride, aluminum oxide, zirconium oxide, iron oxide, cobalt oxide. The preparation process is simple, the conditions are easy to control, the production cost is low, and the industrial production is easy. In the polishing process, it has good powder polishing effect, high gloss, no scratches, high flatness, and less powder consumption.

The invention discloses a preparation method of laser sintering 3D printing rapid prototyping alumina powder, which is characterized in that distearoyloxyisopropyl aluminate is used to pretreat the alumina powder in ethyl acetate solvent, Obtain pretreated alumina powder; then, in the grinder, add according to mass percentage, treated alumina powder: 84%~90%, thermoplastic phenolic resin: 2%~5%, perchlorethylene resin: 2%~5% , carbon powder: 1.0%~6%, turn on the grinder at 320 rpm, grind for 5 minutes, then add acetone: 2%~8%, the sum of each component is 100%, and the grinder rotates at 320 rpm, Grinding for another 60-80 minutes and drying to obtain laser sintering 3D printing rapid prototyping alumina powder. The material can be directly formed under laser sintering, has high forming precision, high temperature resistance, simple preparation process, easy control of conditions, low production cost and easy industrial production.

The invention discloses a preparation method of an aluminum oxide powder 3D printing material. The preparation method is characterized by comprising the following steps: adopting a sodium hexametaphosphate aqueous solution to pretreat the aluminum oxide powder, and obtaining the pretreated aluminum oxide powder; adding the following constituents into a grinding miller according to mass percent: 80-87% of aluminum oxide powder, 2-6% of photosensitive epoxy resin, 1-3% of petroleum resin and 0.5-3% of hydroxylamine hydrochloride; starting the grinding miller, keeping the revolving speed to be 400 rpm, grinding for 5 minutes, and then adding 8-15% of acetone, wherein the sum of the constituents in mass percent is 100%; keeping the revolving speed of the grinding miller to be 400 rpm, then grinding for 20-30 minutes, drying, and at last obtaining the aluminum oxide powder 3D printing material. The material can be directly molded instead of being sprayed with an adhesive substance under a laser sintering condition, is high in molding precision, simple in preparation process, easy to control conditions, low in production cost, and easy for industrial production.

The invention discloses a preparation method of a 3D printing zirconium dioxide powder moulding material. The preparation method of the 3D printing zirconium dioxide powder moulding material is characterized by comprising the following steps: carrying out pre-treatment on zirconium dioxide powder in an ethanol solvent by adopting allyl trimethoxy silicane, so that pretreated zirconium dioxide powder is obtained; then adding 60-72% by mass of petroleum ether and 3-8% by mass of polyethylene into a reactor, heating, stirring, dissolving, and then adding 20-30% by mass of pretreated zirconium dioxide powder and 1-4% by mass of azodiisobutyronitrile, wherein the sum of the percents by mass of all the components is one hundred percent; heating while stirring until the temperature is increased to 80+ / -5 DEG C, carrying out constant temperature refluxing reaction for 6-8 hours, cooling to room temperature, and then carrying out spray drying, so that the 3D printing zirconium dioxide powder moulding material is obtained. The 3D printing zirconium dioxide powder moulding material can be directly moulded without spraying a binding agent in a range that the temperature is increased to 125-137 DEG C by heating and has the advantages that a preparation technology is simple, conditions are easy to control, production cost is low, and industrial production can be easily realized.