| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat treatment vessel excellent in thermal shock resistance.SOLUTION: A heat treatment vessel is a tank type heat treatment vessel includes a planar bottom part, and an upright planar wall part formed all along the circumference of peripheral edge portion of the bottom part. The heat treatment vessel is formed by heat-treating a compact of ceramic powder. When the thickness of a thinnest portion of the wall part is described as 100%, the heat treatment vessel is formed with ceramic powder having a maximum grain size of 5-16%. |
