Analysis of structural and heat-physical properties of Sm-2(Hf1-xCex)(2)O-7 Ceramics

作者：Wang Shi-Min; Chen Jin; Zhao Yong-De; Zhang Hong-Song^*; Wang Fei^*; Mai Wen-Peng; Duan Qun-Peng

来源：Ceramics International, 2018, 44(18): 23284-23287.

DOI：10.1016/j.ceramint.2018.09.002

• Rare-earth hafnium oxides
• Ion-introduction
• Heat physical properties

In the present study, a series of Sm-2(Hf1-xCex)(2)O-7 ceramics were fabricated by solid-state reaction method, and their structural and thermophysical properties were studied. The results indicated that all the Sm-2(Hf1-xCex)(2)O-7 oxides exhibited a single fluorite-type structure, except for Sm2Hf2O7 which showed a pyrochlore structure. Because of the phonon scattering caused by CeO2 doping, the heat conductivity of Sm-2(Hf1-xCex)(2)O-7 was reduced. The thermal expansion coefficient was also reduced owing to the relatively low electronegativity of Ce4+ ions. The heat-physical properties of the obtained ceramics met the basic requirements of thermal barrier coatings.

• 出版日期2018-12-15
• 单位河南大学