本文就绝热机陶瓷活塞材料选择及空气隔热层设计布置特点,从隔热效果与应力强度相协调和统一的观点作出分析,并进行有益的讨论. In this paper, the selection of ceramic piston materials and the design features of air insulation layer are analyzed. The analysis is made from the point of view of harmonization and unification of thermal insulation effect and stress intensity, and a useful discussion is made.