Analysis of structural and heat-physical properties of Sm2(Hf1-xCex)2O7 Ceramics. Issue 18 (15th December 2018)

• Record Type: Journal Article
• Authors: Wang, Shi-Min; Chen, Jin; Zhao, Yong-De; Zhang, Hong-Song; Wang, Fei; Mai, Wen-Peng; Duan, Qun-Peng
• Is Part Of: Ceramics international. Volume 44:Issue 18(2018)
• Page Start: 23284
• Page End: 23287
• Publication Date: 2018-12-15
• Subjects: Rare-earth hafnium oxides -- Ion-introduction -- Heat physical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.09.002
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In the present study, a series of Sm2 (Hf1-x Cex )2 O7 ceramics were fabricated by solid-state reaction method, and their structural and thermophysical properties were studied. The results indicated that all the Sm2 (Hf1-x Cex )2 O7 oxides exhibited a single fluorite-type structure, except for Sm2 Hf2 O7 which showed a pyrochlore structure. Because of the phonon scattering caused by CeO2 doping, the heat conductivity of Sm2 (Hf1-x Cex )2 O7 was reduced. The thermal expansion coefficient was also reduced owing to the relatively low electronegativity of Ce 4+ ions. The heat-physical properties of the obtained ceramics met the basic requirements of thermal barrier coatings.