Silicon carbide powder and preparation method therefor

• Main Authors: KIM YOUNG-HUN, LEE KYOUNG-JIN, LEE JE-KYUN, HWANG HAE-JIN
• Format: Patent
• Language: Chinese; English
• Published: 21.05.2019
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The present invention relates to a preparation method for ultra-pure silicon carbide using a superporous spherical silica aerogel as a silica raw material, wherein the method having effects of enabling the low-temperature synthesis of silicon carbide by increasing a reaction area with a carbon raw material, producing ultra-pure silicon carbide by uniformly adjusting the size and shape of a siliconcarbide powder, and improving the economic efficiency and productivity in the synthesis of silicon carbide by using low-priced water glass to prepare the silica aerogel particles, and therefore, it is expected that the silicon carbide powder prepared by the preparation method of the present invention can be provided as a raw material optimized for the preparation of silicon carbide sintered bodies and single crystal ingots. 本发明涉及一种使用超多孔球形二氧化硅气凝胶作为二氧化硅原料的超纯碳化硅的制备方法，其中，相对于碳原料的反应区域增加，使得能够低温合成碳化硅，可以均匀地控制碳化硅粉末的尺寸和形状以制备超纯碳化硅，通过使用低成本的水玻璃制备二氧化硅气凝胶粒子，可以提高碳化硅合成的经济效率和生产率，因此，预期可以提供通过本发明的制备方法制备的碳化硅粉末作为制备碳化硅烧结体和单晶(晶锭)的最佳原料。