ALUMINA SINTERED BODY, HEAT TREATING ARTICLE USING THE SAME AND MANUFACTURING METHOD OF ALUMINA SINTERED BODY

摘要

PROBLEM TO BE SOLVED: To provide an alumina sintered body capable of suppressing the deposition of PbO on the surface part while suppressing the absorption of PbO. SOLUTION: The alumina sintered body prepared by firing alumina powder is composed of at least a double layer structure of a grain growth layer forming a surface layer and a fine grain layer forming an inside layer.