| Ba(Zr_xTi_(1-x))O_3陶瓷的介电弛豫特性 |
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| 引用本文： | 单丹,曲远方.Ba(Zr_xTi_(1-x))O_3陶瓷的介电弛豫特性[J].电子元件与材料,2008,27(12). |
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| 作者姓名： | 单丹 曲远方 |
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| 作者单位： | 1. 中国舰船研究设计中心,湖北,武汉,430064;天津大学,先进陶瓷与加工技术教育部重点实验室,天津,300072
2. 天津大学,先进陶瓷与加工技术教育部重点实验室,天津,300072 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 采用固相反应法制备了Ba(ZrxTi1-x)O3(x=0～0.5)陶瓷,并以Fulcher的居里-外斯定律修正方程为依据,求出各样品的弛豫常数γ,以讨论组分对其介电弛豫特性的影响。结果表明:与纯相BaTiO3陶瓷相比,Ba(ZrxTi1-x)O3陶瓷的εr峰值εm由8000(x=0)上升至15000(x=0.25)以上。该陶瓷在x=0.25附近存在着立方–四方相共存的准同型相界,由于准同型相界的高晶格活性,在弛豫特性上有了较大的提高。
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| 关 键 词： | 无机非金属材料 Ba(ZrxTi1-x)O3 准同型相界 介电弛豫 介电常数 |
Dielectric relaxation characteristics of Ba(Zr_xTi_(1-x))O_3 ceramics |
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| SHAN Dan,QU Yuan-fang.Dielectric relaxation characteristics of Ba(Zr_xTi_(1-x))O_3 ceramics[J].Electronic Components & Materials,2008,27(12). |
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| Authors: | SHAN Dan QU Yuan-fang |
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| Affiliation: | SHAN Dan1,QU Yuan-fang2 (1. China Ship Development , Design Center,Wuhan 430064,China,2. Key Laboratory of Advanced Ceramics , Machining Technology of Ministry of Education,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Ba(ZrxTi1-x)O3 ceramics were prepared by a solid-state reaction method,and take the amendatory equation of Curie-Weiss law by Fulcher as a basis,the relaxation constants of γ were obtained and the effects of components on the dielectric relaxation characteristics were discussed for all samples. The results show that the maximum permittivity (εm) of Ba(ZrxTi1-x)O3 ceramics was greatly increased from 8 000 (x = 0) to more than 15 000 (x = 0.25) compared with pure phase BaTiO3 ceramics. There exists a morphotropic phase boundary having tetragonal and rhombohedral phases coexistence for the ceramics near x = 0.25. Because of the high crystal lattice activity of morphotropic phase boundary,the relaxation characteristics of the ceramics have a greater improvement. |
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| Keywords: | Ba(ZrxTi1-x)O3 |
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