Heat-resistant materials and method of producing them.

摘要

A novel solid solution has a composition of RyZr4SixP6-xO24 (R is at least one element capable of forming bivalent or trivalent cation, 0</=x</=2, 2/3</=y</=2). Furthermore, heat-resistant sintered body and heat-resistant phosphate based compound sintered body comprises the above solid solution and has excellent heat resistance and high temperature stability. And also, a method of producing such sintered bodies is disclosed.