| 新铁电陶瓷材料PZT热物理性能和相变的研究 |
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| 引用本文： | 吴清仁,奚同庚,文梓芸. 新铁电陶瓷材料PZT热物理性能和相变的研究[J]. 华南理工大学学报(自然科学版), 2000, 28(12): 54-58 |
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| 作者姓名： | 吴清仁 奚同庚 文梓芸 |
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| 作者单位： | 1. 华南理工大学材料科学与工程学院,广东,广州,510640
2. 中国科学院,上海硅酸盐研究所,上海,200050 |
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| 基金项目： | 中国科学院资助项目，国家自然科学基金，59172081，95ZE1404，， |
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| 摘 要： | 采用日本制造的闪光法TLP－18型仪器和线差法的TMA－30型仪器分别测试了PZT（51／49）铁电陶瓷的导温系数和热膨胀系数，并研究了温度，相变，极化处理和晶轴对其物理性能的影响，结果表明，在相变发生时，热物理性能产生了突变；导温系数随着温度而增大，而热膨胀系数却随着温度升高而减小，这为铁电陶瓷材料的相变研究提供了重要的理论依据。
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| 关 键 词： | 热物理性能 相变 极化处理 铁电陶瓷材料 热物理性能 |
| 修稿时间： | 2000-03-31 |
An Investigation Into the Thermophysical Properties and Phase Transitions of New Ferroelectric Ceramic Material PZT |
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| WU Qing-ren,XI Tong-gen,WEN Zi-yun. An Investigation Into the Thermophysical Properties and Phase Transitions of New Ferroelectric Ceramic Material PZT[J]. Journal of South China University of Technology(Natural Science Edition), 2000, 28(12): 54-58 |
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| Authors: | WU Qing-ren XI Tong-gen WEN Zi-yun |
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| Abstract: | Thermal diffusivity and thermal expansion of PZT(51/49: in mole) ferroelectric ceramic materials were measured in wide temperature ranges by using the laser-flash method and the linear-differential method respectively. The effect of temperature, polarization treatment and crystal orientation on the thermophysical properties for this ceramic are studied. It is shown from the measured data that there are sudden changes in the thermophysical properties during its phase transitions, and its thermal diffusivity increases with the temperature rise and its thermal expansion decreases with the temperature rise. The results provide an important theoretical criterion for the study of ferroelectric phase transition. |
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| Keywords: | thermophysical properties phase transitions polarization ferroelectric ceramics |
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