Alumina sintered body with excellent high temperature properties and corrosion resistance

摘要

PROBLEM TO BE SOLVED: To provide an alumina sintered body excellent in high temperature property and corrosion resistance.SOLUTION: There is provided an alumina sintered body satisfying requirements 1 to 7. 1 alumina content is 98.3 wt.% or more. 2 magnesia content is 0.1 to 1.0 wt.%. 3 silica content is 0.10 wt.% or less. 4 weight ratio of magnesia and silica (magnesia/silica) is 2.0 or more. 5 bulk density is 3.85 g/cmor more. 6 average crystal particle diameter is 3 to 20 μm. 7 a ratio of MgAlOspinel and alumina (MgAlOspinel/alumina) is 0.01 to 0.07.SELECTED DRAWING: None