Preparation and Thermal Conductivity of Dy2Ce2O7 Ceramic Material

被引：17
|
作者：
Zhang Hongsong [1 ,2 ]
Liao Suran [3 ]
Guan Shaokang [2 ]
机构：
[1] Henan Inst Engn, Dept Mech Engn, Zhengzhou 451191, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450007, Peoples R China
[3] Henan Inst Engn, Dept Mat & Chem, Zhengzhou 451191, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2012年 / 21卷 / 06期
关键词：
Ceramic material; Thermal barrier coatings; Thermal conductivity; Phonon scattering; THERMOPHYSICAL PROPERTIES; OXIDES; EXPANSION;
D O I：
10.1007/s11665-011-9950-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dy2Ce2O7 ceramic material was prepared by solid reaction method at 1600 A degrees C for 10 h. The phase composition, microstructure, and thermal conductivity of this material were investigated. XRD results reveal that single-phase Dy2Ce2O7 with fluorite structure was synthesized successfully. Microstructure of Dy2Ce2O7 was dense and no other unreacted oxides or interphase existed in the interfaces between grains. Because of phonon scattering by oxygen vacancies and difference in atomic mass between substitutional atoms and host atoms, thermal conductivity of Dy2Ce2O7 is lower than that of 8YSZ, which implies that this ceramic can be used as novel candidate materials for thermal barrier coatings in the future.
引用
收藏
页码：1046 / 1050
页数：5
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