Preparation, thermophysical performances of Ca3Ln3Ti7Ta2O26.5 (Ln = Yb and Y) oxides for thermal barrier coating applications

被引：3
作者：
Zhang Hongsong [1 ]
Yang Shusen [2 ]
Tong Yuping [3 ]
Yang Xianfeng [1 ,4 ]
Sang Weiwei [1 ]
Zhao Yongtao [1 ]
机构：
[1] Henan Univ Engn, Dept Mech Engn, Zhengzhou 451191, Peoples R China
[2] Railway Police Coll, Rail Transit Secur Dept, Zhengzhou, Henan, Peoples R China
[3] North China Univ Water Sources & Elect Powder, Sch Mat Sci & Engn, Zhengzhou 450011, Peoples R China
[4] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410014, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2020年 / 46卷 / 05期
关键词：
Rare earth titanate; Thermal-physical performances; Pyrochlore complex oxides; PYROCHLORE-TYPE OXIDES; DIELECTRIC-PROPERTIES; PHYSICAL-PROPERTIES; CARBON NANOTUBES; SM; CONDUCTIVITY; GD; ND; LA; DIFFRACTION;
D O I：
10.1016/j.ceramint.2019.11.136
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this manuscript, the Ca(3)Ln(3)Ti(7)Ta(2)O(26)(.5) (Ln = Y and Yb) oxides were prepared by employing a high-temperature solid-phase reaction method at 1773 K for 10 h. The phase compositions and thermal-physical performances were studied. The results show that the synthesized oxides are of a single pyrochlore-type lattice, the thermal conductivity of Ca3Y3Ti7Ta2O26.5 is larger than that of Ca3Yb3Ti7Ta2O26.5, and the coefficient of thermal expansion of Ca3Yb3Ti7Ta2O26.5 is higher than that of Ca3Y3Ti7Ta2O26.5. The thermal-physical properties match well with the requirements for thermal barrier coatings.
引用
收藏
页码：6531 / 6536
页数：6
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