Phase transition and electrical properties of high performance, high temperature Bi(mg,Ti)O3-PbTiO3-PbZrO3 relaxor ferroelectric ceramics

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Electroceramics Pub Date : 2023-01-17 DOI:10.1007/s10832-023-00302-4

Jiao Jin, Jiansheng Zhang, Min Shi, Chongyou Feng, Yichen Huang

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引用次数: 1

Abstract

Traditional Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ based relaxor ferroelectrics have attracted much attention. However, the relatively low T_m restricts their application in the high temperature range. In the present study, a novel (0.8-x)Bi(Mg_1/2Ti_1/2)O₃-xPbTiO₃-0.2PbZrO₃ ((0.8-x)BMT-xPT-PZ) relaxor ferroelectric based on the high temperature BMT-PT piezoelectrics was designed. All samples exhibit pure perovskite structures and the phase structures show a gradual transition from relaxor rhombohedral (R) to normal tetragonal (T) phases via the morphotropic phase boundary (MPB) in the composition range x = 0.36–0.39. The dielectric relaxation behavior can be observed in all samples although a spontaneous normal-relaxor ferroelectric transformation is observed in the T phase region. The x = 0.38 sample exhibits the optimal overall electrical properties with the d₃₃ value of 325 pC/N, the k_p value of 0.38, the T_m value of 290 ^oC. The results indicate that the present studied ternary system has a good potential as high temperature relaxor ferroelectrics.

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高性能、高温Bi(mg,Ti)O3-PbTiO3-PbZrO3弛豫铁电陶瓷的相变和电学性能

传统的Pb(Mg1/3Nb2/3)O3-PbTiO3基弛豫铁电体备受关注。然而，相对较低的Tm限制了它们在高温范围内的应用。本研究设计了一种基于高温BMT-PT压电材料的新型(0.8-x)Bi(Mg1/2Ti1/2)O3-xPbTiO3-0.2PbZrO3 ((0.8-x)BMT-xPT-PZ)弛豫铁电材料。在组成范围x = 0.36 ~ 0.39范围内，所有样品均表现为纯钙钛矿结构，相结构通过趋形相边界(MPB)由松弛菱形(R)逐渐转变为正四方(T)相。在所有样品中都可以观察到介电弛豫行为，尽管在T相区观察到自发的正弛豫铁电转变。当x = 0.38时，样品的d33值为325 pC/N, kp值为0.38,Tm值为290 oC，整体电学性能最佳。结果表明，所研究的三元体系具有作为高温弛豫铁电体的良好潜力。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.