Method for preparing transparent ceramic through vacuum hot pressing and sintering by using commercially available calcium fluoride powder as raw material

• Main Authors: JIA MENGYING, JING QIANGSHAN, LIU PENG, LIU ZUODONG, GAO QI, CHANG FANGFEI
• Format: Patent
• Language: Chinese; English
• Published: 23.04.2019
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention discloses a method for preparing transparent ceramic through vacuum hot pressing and sintering by using commercially available calcium fluoride powder as a raw material. The method comprises the following steps: 1) using the commercially available calcium fluoride powder as the raw material, adding a setting amount of sodium fluoride powder, uniformly mixing; 2) selecting a graphitemould, loading mixed powder in the mould, and enabling the mould to be separated from the powder by using graphite paper; 3) placing the loaded graphite mould in a vacuum hot pressing furnace for sintering; 4) after sintering, polishing ceramic, to obtain the calcium fluoride transparent ceramic. Compared with a current calcium fluoride transparent ceramic preparation method, the advantage of themethod is that the commercially available calcium fluoride powder is directly used as the raw material without a process of chemically synthesizing the powder, emission of chemical waste is reduced, and a preparation period is