| PMN-PZN-PT铁电陶瓷的准同型相界及电学性能 |
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| 引用本文： | 陈焱,张孝文. PMN-PZN-PT铁电陶瓷的准同型相界及电学性能[J]. 稀有金属材料与工程, 2009, 38(Z2) |
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| 作者姓名： | 陈焱 张孝文 |
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| 作者单位： | 清华大学,新型陶瓷与精细工艺国家重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金,清华大学新型陶瓷与精细工艺国家重点实验室课题基金 |
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| 摘 要： | 基于准同型相界(morphotropic phase boundary, MPB) 线性组合规律,研究Pb(Mg_(1/3)Nb_(2/3))O_3 -Pb(Zn_(1/3)Nb_(2/3))O_3-PbTiO_3 (PMN-PZN-PT)三元系的MPB区域,并探求电学性能优越的组分.实验选取(1-x) (0.67 PMN- 0.33 PT)-x(0.91 PZN-0.09 PT) 系列中x=0～0.85的8个实验点;为减少焦绿石相的生成,陶瓷试样用铌铁矿预产物法合成,最终在1120～1160 ℃烧成.X射线衍射分析表明该系列试样均为钙钛矿结构,且处于四方与菱方两相共存态,验证了两个子二元系MPB组分的连线均为该三元系的MPB区域.少量的PZN-PT取代PMN-PT可以提高该三元系的电学性能;在x=0.1的组分获得该系列的最优性能:极值介电常数ε_(m,1 kHz)=28 030,剩余极化强度Pr=32.5 μC/cm~2,压电系数d_(33)=545 pC/N.
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| 关 键 词： | 准同型相界 介电性能 铁电性能 压电性能 |
Morphotropic Phase Boundary and Electrical Properties of PMN-PZN-PT Ceramics |
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| Chen Yan,Zhang Xiaowen. Morphotropic Phase Boundary and Electrical Properties of PMN-PZN-PT Ceramics[J]. Rare Metal Materials and Engineering, 2009, 38(Z2) |
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| Authors: | Chen Yan Zhang Xiaowen |
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| Affiliation: | Chen Yan,Zhang Xiaowen (State Key Laboratory of New Ceramics , Fine Processing,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Based on the morphotropic phase boundary(MPB) compositions of the two subsystems,a series of (1 -x)(0.67 Pb(Mg1/3Nb2/3)O3-0.33 PbTiO3)-x(0.91 Pb(Zn1/3Nb2/3)O3-0.09 PbTiO3) in the ternary system with different x were studied. Ceramic samples were synthesized by the columbite precursor method. The microstructure,phase states and electrical properties of those samples were investigated as well. X-ray diffraction results demonstrated that all of the samples possess a pure perovskite structure,and lie within the... |
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| Keywords: | PMN-PZN-PT morphotropic phase boundary PMN-PZN-PT dielectric property ferroelectric property piezoelectric property |
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