摘要 |
PURPOSE:To manufacture tetragonal zirconia fine powder which is suitable as raw material for manufacturing a partially stabilized zirconia sintered body and has uniform grain size by reacting steam with gasified zirconium compound. CONSTITUTION:A gas obtained by heating zirconium compound (for example, zirconium chloride, tetraethoxyzirconium) in the atmosphere of inert gas is brought into contact with >=10 times equivalent steam oxygen or air may be used as a carrier) per said gas to react at about 600-1,100 deg.C to form tetragonal zirconia fine powder (about 150-300Angstrom grain size). Said zirconia fine powder is dispersed and mixed in the soln. of a stabilizer (for example, yttrium acetate) and thereafter is dried. Next, the zirconia fine powder coated with the stabilizer is molded and sintered at about 1,200-1,500 deg.C to obtain a partially stabilized zirconia sintered body easily.
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