Thermal equations of state and phase relation of PbTiO3: A high P-T synchrotron x-ray diffraction study
文献类型：期刊论文
| 作者 | Zhu, JL ; Xu, HW ; Zhang, JZ ; Jin, CQ ; Wang, LP ; Zhao, YS |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 110期号:8 |
| 关键词 | OF-STATE FERROELECTRIC PEROVSKITES TEMPERATURE-DEPENDENCE DIELECTRIC-PROPERTIES HIGH-PRESSURE TRANSITION EXPANSION TITANATE BATIO3 |
| ISSN号 | 0021-8979 |
| 通讯作者 | Zhu, JL (reprint author), Los Alamos Natl Lab, LANSCE, POB 1663, Los Alamos, NM 87545 USA. |
| 中文摘要 | The phase relation of tetragonal and cubic PbTiO3 and their unit-cell parameters have been determined by synchrotron x-ray diffraction at pressures up to 7.8 GPa and temperatures up to 1074 K with a cubic anvil apparatus. From these measurements, a pressure-temperature phase boundary between the tetragonal and cubic phases has been established. With increasing temperature or pressure, the c/a ratio of the ferroelectric, tetragonal PbTiO3 becomes closer to unity, suggesting that both heating and compression favor the paraelectric, cubic structure. Using a modified high-T Birch-Murnaghan equation of state and a thermal-pressure approach, we have derived the thermoelastic parameters of tetragonal and cubic PbTiO3, including the ambient bulk modulus K-0, temperature derivative of bulk modulus at constant pressure, volumetric thermal expansivity, pressure derivative of thermal expansion, and temperature derivative of bulk modulus at constant volume. Our obtained K-0 value for tetragonal PbTiO3 is consistent with previously reported results, while that for cubic PbTiO3 is smaller than earlier results probably due to differences in the experimental techniques used (cubic anvil apparatus versus diamond anvil cell) and related stress conditions of the samples. All other thermoelastic parameters for both tetragonal and cubic PbTiO3 have been determined for the first time. Compared with previous high-temperature data at atmospheric pressure, our P-V-T dataset for tetragonal PbTiO3 infers a pressure-induced crossover in volumetric thermal expansion from negative to positive between 0 and 1 GPa, an phenomenon that is of fundamentally interest and practically important. (C) 2011 American Institute of Physics. [doi:10.1063/1.3651377] |
| 收录类别 | SCI |
| 资助信息 | Los Alamos National Laboratory [DE-AC52-06NA25396]; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]; COMPRES; Consortium for Materials Properties Research in Earth Sciences under NSF [EAR 01-35554]; Mineral Physics Institute, Stony Brook University; nsf; MOST of China [2009CB623301, 10820101049] |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/45717]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhu, JL,Xu, HW,Zhang, JZ,et al. Thermal equations of state and phase relation of PbTiO3: A high P-T synchrotron x-ray diffraction study[J]. JOURNAL OF APPLIED PHYSICS,2011,110(8). |
| APA | Zhu, JL,Xu, HW,Zhang, JZ,Jin, CQ,Wang, LP,&Zhao, YS.(2011).Thermal equations of state and phase relation of PbTiO3: A high P-T synchrotron x-ray diffraction study.JOURNAL OF APPLIED PHYSICS,110(8). |
| MLA | Zhu, JL,et al."Thermal equations of state and phase relation of PbTiO3: A high P-T synchrotron x-ray diffraction study".JOURNAL OF APPLIED PHYSICS 110.8(2011). |
入库方式： OAI收割
来源：物理研究所
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