Visible light shielding white-based ceramics, the manufacturing method and white ceramics visible light shield

摘要

PROBLEM TO BE SOLVED: To provide an integrated white ceramic which has visible light shielding properties suitable for semiconductors and electronic parts and delicate and excellent mechanical characteristics.SOLUTION: A visible light shielding ceramic uses three raw material powders consisting of 20-70 mass% of alumina, 15-70 mass% of zirconia stabilized or partially stabilized with yttria and 5 mass% or more of titanium oxide as a basic composition and is a ceramic formed by mixing the raw material powders uniformly, molding and sintering to form oxygen-defective titanium oxide in the structure. A method of producing a visible light shielding white ceramic comprises mixing the raw material powders uniformly, molding, blackening by reductive sintering and decoloring by annealing in an oxidative atmosphere.