| (1-x)PMN-xPT铁电致冷陶瓷的研究 |
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| 引用本文： | 肖定全,王永川,张荣龙,彭商强,杨 斌,朱建国,张 文,王洪涛.(1-x)PMN-xPT铁电致冷陶瓷的研究[J].物理学报,1998,47(10):1754-1760. |
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| 作者姓名： | 肖定全 王永川 张荣龙 彭商强 杨 斌 朱建国 张 文 王洪涛 |
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| 作者单位： | 四川大学材料科学系，成都 610064 |
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| 基金项目： | 国家自然科学基金资助的课题(批准号：59582012). |
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| 摘 要： | 概括介绍了铁电致冷基本原理，给出了三种电生热效应，即线性电生热效应、二次电生热效应和电场诱导一级相变型电生热效应的表达式，测量了(1-x)Pb(Mg1/3 Nb2/3 )O3-xPbTiO3［简记为(1-x)PMN-xPT］，当x=0.08, 0.10和0.25时在室温附近的电生热性能，分析了其电生热效应的起源.研究结果表明，(1-x)PMN-xPT铁电固溶体陶瓷在室温附近具有较大的电生热效应；该效应起源于电场诱导一级相变型电生热效应和线性电生热效应；该系列陶瓷可望用于室温附近多级铁电致冷.
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| 关 键 词： | 电释热 铁电陶瓷 基本原理 铁电材料 铁电致冷 |
| 收稿时间： | 1997-12-15 |
INVESTIGATION OF (1-x)PMN-xPT FERROELECTRIC REFRIGERATION CERAMICS |
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| XIAO DING-QUAN,WANG YONG-CHUAN,ZHANG RONG-LONG,PENG SHANG-QIANG,YANG BIN,ZHU JIAN-GUO,ZHANG WEN and WANG HONG-TAO.INVESTIGATION OF (1-x)PMN-xPT FERROELECTRIC REFRIGERATION CERAMICS[J].Acta Physica Sinica,1998,47(10):1754-1760. |
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| Authors: | XIAO DING-QUAN WANG YONG-CHUAN ZHANG RONG-LONG PENG SHANG-QIANG YANG BIN ZHU JIAN-GUO ZHANG WEN and WANG HONG-TAO |
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| Abstract: | In recent years, the electrocaloric effect (abbr. ECE) of dielectrics has attracted attention for ferroelectric refrigerating application. The fundamentals of ferroelectric refrigeration and the expressions of three types of ECEs, i.e., linear, quadratic and field-induced first-order phase transition electrocaloric effects, are presented in this paper. The ECE properties of (1-x)PbMg1/3Nb2/3O3-xPbTiO3［abbr. (1-x)PMN-xPT］ ferroelectric ceramics(x=0.08, 0.10, and 0.25 respectively) at room temperature were measured and analyzed. It is found that the large electrocaloric effect of (1-x)PMN-xPT ferroelectric ceramics about room temperature is due to the electric-induced first-order phase transition and linear electrocaloric effects, and these ceramics could be used in ferroelectric multi-stage refrigeration. |
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