| Thermal Conductivity of Monazite-Type REPO4 (RE=La, Ce, Nd, Sm, Eu, Gd) | |
| Du, Aibing ; Wan, Chunlei ; Qu, Zhixue ; Pan, Wei | |
| 2010-10-12 ; 2010-10-12 | |
| 关键词 | BARRIER COATINGS HEAT-CAPACITY LANTHANUM CERAMICS CEPO4 XENOTIME SYSTEM OXIDE Materials Science, Ceramics |
| 中文摘要 | Low-thermal conductivity ceramics in monazite-type REPO4 (RE=La, Ce, Nd, Sm, Eu, Gd) ceramics are expected to have potential in structural (refractories, thermal insulator) and nuclear applications. To this end, the present study determines their thermal conductivities and examines how differences of the rare earth ions change their thermal conductivity at different temperatures. The results show that their conductivities are remarkably low from 25 degrees to 1000 degrees C. In addition, different conductivity variation mechanisms exist that change gradually upon altering from LaPO4 to GdPO4 at low and high temperatures. At relatively lower temperatures (< 400 degrees C), the thermal conductivities of all the REPO4 ceramics decrease nearly at first, reach a minimum value, and then rise with gradual altering from LaPO4 to GdPO4. It may be due to the combined effects of the increase of both the anharmonicities in lattice vibrations and the bond strength. As the temperature increases, the conductivity trends become obscure, and the conductivities of the monazite-type REPO4 approach their minimum thermal conductivities when the temperature is above 800 degrees C. |
| 语种 | 英语 ; 英语 |
| 出版者 | WILEY-BLACKWELL PUBLISHING, INC ; MALDEN ; COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/78207]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Du, Aibing,Wan, Chunlei,Qu, Zhixue,et al. Thermal Conductivity of Monazite-Type REPO4 (RE=La, Ce, Nd, Sm, Eu, Gd)[J],2010, 2010. |
| APA | Du, Aibing,Wan, Chunlei,Qu, Zhixue,&Pan, Wei.(2010).Thermal Conductivity of Monazite-Type REPO4 (RE=La, Ce, Nd, Sm, Eu, Gd).. |
| MLA | Du, Aibing,et al."Thermal Conductivity of Monazite-Type REPO4 (RE=La, Ce, Nd, Sm, Eu, Gd)".(2010). |
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