4results about How to "Strong purity" patented technology

The invention discloses a phosphate functionalized silicon-based solid adsorbent and application thereof, and belongs to the technical field of yttrium separation and purification, a preparation method comprises the following steps: step 1, synthesizing silicon-based resin particles SiO2-P by using spherical porous silicon dioxide as a solid-phase carrier and styrene as a raw material through an in-situ polymerization technology, and 2, synthesizing the phosphate-functionalized silicon-based solid adsorbent HDEHP / SiO2-P by using di (2-ethylhexyl) phosphate HDEHP as a raw material and utilizing a vacuum impregnation technology. Therefore, the phosphate functionalized silicon-based solid adsorbent and the application thereof are adopted in the invention. The phosphate can specifically and selectively extract trivalent yttrium ions, so that efficient separation of yttrium and strontium is realized, high-purity yttrium can be obtained through separation and purification after elution, and a solid adsorbent can be recycled.

This invention discloses a method for preparing high-density, high-purity polycrystalline barite polymers under hot isostatic pressing conditions, wherein barite sample powder is compacted and sealed to a vacuum degree of 10. –3 The sample was placed in a steel cladding with dimensions of 55.89 mm outer diameter × 88.76 mm height × 3 mm wall thickness. The cladding was then placed inside the graphite furnace cylinder of a hot isostatic pressure vessel and sealed with a graphite cap. Using argon as the pressure transfer medium, a multi-gradient cylinder heating and pressurization method was employed to raise the temperature inside the sample chamber to 950 °C and the pressure to 112.5 MPa. This pressure and temperature were maintained for 6.0 hours. A multi-gradient cylinder cooling and depressurization method was then used to lower the temperature inside the sample chamber to 178 °C and the pressure to 71.1 MPa. The pressure was then released and the sample was cooled to room temperature to obtain a polycrystalline barite polymer. This method filled the technical gap in the preparation of bulk sulfate experimental samples of high-density polycrystalline barite polymers under high temperature and high pressure conditions.

The invention discloses a medical metal surface piezoelectric coating and a preparation method thereof, and belongs to the technical field of medical biomaterial implants, the preparation method of the piezoelectric coating comprises the following steps: carrying out surface laser ablation on metal to obtain an oxidized nano coating; carrying out hydrothermal reaction on an alkaline solution and the oxidized nano coating under high-temperature and high-pressure conditions to obtain a piezoelectric coating; wherein the metal is tantalum, titanium or niobium; the conditions of high temperature and high pressure are 100-300 DEG C and 1-30 MPa. The problems that an existing implant bone and a piezoelectric coating are poor in binding force, low in mechanical strength, poor in biocompatibility and the like are solved.

The application discloses a preparation method of high-density high-densification polycrystalline trachyandesite under high-temperature high-pressure conditions. –3 The application discloses a preparation method of high-density high-densification polycrystalline trachyandesite under high-temperature high-pressure conditions, which comprises the following steps: completely sealing trachyandesite sample powder in a ladle cover with a vacuum degree of 10 –3 Pa; placing the ladle cover in a graphite furnace cylinder body of a high-pressure container of a hot isostatic pressing device, covering a graphite sealing cover; taking argon as a pressure transmission medium; adopting a multi-gradient hot isostatic pressing forming process of first increasing pressure and then increasing temperature to increase the temperature in the cylinder body sample bin to 950°C and the pressure to 91.5 MPa, and keeping constant temperature and constant pressure for 6.8 hours; adopting a multi-gradient cylinder body temperature and pressure decreasing mode to decrease the temperature in the cylinder body sample bin to 176°C and the pressure to 58.7 MPa; and finally, decreasing the pressure and temperature to room temperature to obtain a polycrystalline trachyandesite aggregate sample; and the technical blank of preparing a large bulk experimental sample of high-densification polycrystalline trachyandesite aggregate under high-temperature high-pressure conditions is solved.