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151results about How to "Promote exfoliation" patented technology

Titanium dioxide-hydroxyapatite gradient coating of medical titanium or titanium alloy surface and preparation method

The invention discloses a titanium dioxide-hydroxyapatite gradient coating of a medical titanium or titanium alloy surface and a preparation method. The inner layer of the titanium dioxide-hydroxyapatite gradient coating is a composite layer of the titanium dioxide and the hydroxyapatite while the outer layer of the titanium dioxide-hydroxyapatite gradient coating is a hydroxyapatite coating. The preparation method comprises the following steps of: using titanium or titanium alloy as anode and metal stainless steel as cathode; carrying out microarc oxidation on the titanium or titanium alloy by using a direct current pulse power supply; after forming a porous structure containing titanium dioxide and amorphous calcium and phosphorus on the surface of the titanium or titanium alloy, coating the hydroxyapatite on the surface; and finally obtaining the titanium dioxide-hydroxyapatite gradient coating. The porous structure formed after the microarc oxidation is beneficial for improving the bonding strength of a titanium or titanium alloy substrate and the costing; the titanium dioxide layer formed by the microarc oxidation has a transitional effect on the performance so that the residual stress between the substrate and a hydroxyapatite bioactive coating can be reduced. The preparation method has the advantages of simplicity and convenience in operation.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Gynecological sugar-free gynaecopathia treating particle and preparation method thereof

The invention relates to a Chinese medicinal sugar-free gynaecopathia treating particle for treating gynaecopathia and a preparation method thereof. The particle is prepared from the following raw and auxiliary materials in parts by weight: 115 parts of prepared rehmannia root, 46 parts of szechuan lovage rhizome, 93 parts of white paeony root, 46 parts of Chinese mugwort leaf, 69 parts of Chinese angelica, 46 parts of liquoric root, 69 parts of donkey-hide gelatin, and non-cane-sugar auxiliary materials consisting of 100-800 parts of a diluent, 0-100 parts of a wetting agent, 0-50 parts of a bonding agent and 0-10 parts of a flavoring agent. The preparation method comprises the following steps of: extracting volatile oil from Chinese angelica, Chinese mugwort leaf and szechuan lovage rhizome, adding water into decoction dregs, white paeony root, prepared rehmannia root and liquoric root for decocting twice for 3 hours in a first time and 2 hours in a second time, combining decoctions, standing for 18-24 hours, and filtering to obtain an extract; and smashing the donkey-hide gelatin, adding donkey-hide gelatin powder and non-cane-sugar auxiliary material powder into the extract, preparing into particles, drying and spraying volatile oil. The particle is a sugar-free preparation, and is suitable for people suffering from diabetes and other people with no sugar requirements; and the using amount of the auxiliary materials is lowered remarkably.
Owner:武汉哈瑞医药有限公司

Special surface drip irrigation emitter capable of automatically cleaning blocking antibiotic membranes

The invention relates to a special surface drip irrigation emitter capable of automatically cleaning blocking antibiotic membranes. The special surface drip irrigation emitter is characterized by comprising a dripper body disposed in a drip irrigation tube, two end adhesion surfaces are disposed at the outermost ends of two axial sides of the dripper body, two water outlets are arranged on the dripper body and positioned on inner sides of the two end adhesion surfaces, two groups of flow channels are radially arranged on the dripper main body at intervals and positioned between the two water outlets, each group of flow channels consists of a plurality of flow channels axially disposed and communicated with each other, two water inlets are arranged at one end of the dripper body and positioned among the two groups of flow channels and the corresponding water outlet at intervals, a trash rack is arranged on each water inlet, each group of flow channels is connected with the corresponding water inlet, two flow buffering areas are axially arranged on the surface of the dripper body and between the two groups of flow channels, a plurality of water retaining components are arranged inside each flow buffering area in a staggered manner, a radial side of each flow buffering area is correspondingly communicated with one group of flow channels, and two axial ends of the two flow buffering areas are correspondingly communicated with the water outlets at the corresponding ends.
Owner:CHINA AGRI UNIV

Magnesia carbon brick for vicinity of furnace door of electric arc furnace and preparation method of magnesia carbon brick

The invention relates to a magnesia carbon brick for the vicinity of the furnace door of an electric arc furnace and a preparation method of the magnesia carbon brick. The prepared magnesia carbon brick is prepared from the following raw materials in parts by weight: 20-30 parts of fused magnesia of which the granularity is more than or equal to 3mm and less than 5mm, 20-40 parts of fused magnesiaof which the granularity is more than or equal to 1mm and less than 3mm, 10-20 parts of fused magnesia of which the granularity is more than or equal to 0.1 mm, 5-20 parts of fused magnesia powder ofwhich the granularity is smaller than 0.088 mm, and 12-16 parts of flake graphite, 1-3 parts of phenolic resin binder, and 1-6 parts of additive; the content of magnesium oxide in the fused magnesiteis greater than or equal to 97.5 wt%, and the volume density of the fused magnesite is greater than 3.45 g / cm <3>. According to the magnesia carbon brick for the vicinity of the furnace door of an electric arc furnace and a preparation method of the magnesia carbon brick of the invention, the phenolic resin binder is used; the phenolic resin binder is utilized to prepare the fused magnesite and flake graphite with different particle sizes under the action of the additive, so that the magnesia carbon brick has the advantages of good heat-conducting property, low thermal expansion coefficient,high tensile strength, good toughness, oxidation resistance and scour resistance.
Owner:北京利尔高温材料股份有限公司

Preparation method of high-purity quartz sand

The invention discloses a preparation method of high-purity quartz sand, and belongs to the technical field of mineral refining, and the preparation method comprises the following steps: crushing: crushing quartz sand crude ore into quartz sand particles; ultrasonic scrubbing: performing ultrasonic scrubbing on quartz sand particles; magnetic separation: selecting high gradient magnetic separatorfor three times magnetic separation of quartz sand fine sand; acid leaching: performing microwave heating quartz sand after flotation, then stirring and soaking with a 10% oxalic acid solution; flotation: mixing the quartz sand after acid leaching with water and putting into a flotation machine, adjusting the pH value in three steps, and using different collectors for flotation at the same time; drying and bagging: drying in a vacuum drying oven, and vacuum bagging after cooling. The preparation process is simple, reasonable and efficient in design; iron impurities in the quartz sand can be removed by ultrasonic scrubbing, multiple magnetic separation, microwave heating and acid leaching and flotation; the iron impurities in the prepared high-purity quartz sand are reduced to below 0.35 mg/kg; and the product has stable quality and high efficiency, and is suitable for large-scale popularization and application.
Owner:SICHUAN QINGCHUAN HONGYUAN STONE IND
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