PURPOSE: To obtain with a high efficiency the spherical molded body consisting of ceramics powder and polymer which is excellent in sphericity and comparatively small by giving a specified sphericity to a sphere diameter.
CONSTITUTION: A ceramics spherical molded body consists of ceramics powder and polymer and has a sphericity of 1% or below to the diameter. For the ceramics powder, silicon nitride, silicon carbide, boron nitride, titanium boride, and boron carbide are used. As a mixing rate, 1-10 pts.wt. of polymer based on 100 pts.wt. of ceramic powder is desirable. The ceramics spherical molded body is obtained in such a manner that a slurry consisting of the ceramics powder, polymerizable monomer and dispersion solvent is dispersed in a liquid which does not mix with the slurry and the monomer is polymerized in a state that the slurry become spherical by the surface tension so as to make a gel of the slurry. Thus, a spherical molded body having a diameter of 10mm or less can be obtained.
MURASHIGE SUSUMU
INOUE YOSHIYUKI
NIKI TOYOAKI
