| Na和Ti掺杂对Bi_2(Zn_(1/3)Nb_(2/3))_2O_7陶瓷性能的影响 |
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| 引用本文： | 李在映,丁士华,宋天秀.Na和Ti掺杂对Bi_2(Zn_(1/3)Nb_(2/3))_2O_7陶瓷性能的影响[J].电子元件与材料,2010,29(4). |
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| 作者姓名： | 李在映 丁士华 宋天秀 |
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| 作者单位： | 西华大学,材料科学与工程学院,四川,成都,610039 |
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| 基金项目： | 西华大学人才基金资助项目(No.R0620109) |
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| 摘 要： | 采用传统固相反应法制备了Na-Ti掺杂Bi2(Zn1/3Nb2/3)2O7陶瓷。研究了Na+替代Bi3+,Ti4+替代Nb5+对Bi2(Zn1/3Nb2/3)2O7陶瓷烧结特性、显微结构和介电性能的影响。结果表明,掺入Na+和Ti4+后,Bi2(Zn1/3Nb2/3)2O7陶瓷的烧结温度从1000℃降到了860℃左右;在–30℃～+130℃的温度范围内,Na-Ti掺杂Bi2(Zn1/3Nb2/3)2O7陶瓷表现出明显的、激活能约为0.3eV的介电弛豫现象。这主要是由缺陷偶极子和晶格畸变在陶瓷中的出现引起的。
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| 关 键 词： | 锌铌酸铋基陶瓷 介电弛豫 离子替代 缺陷偶极子 晶格畸变 |
Effects of Na-Ti doping on the properties of Bi2(Zn1/3Nb2/3)2O7 ceramics |
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| LI Zaiying,DING Shihua,SONG Tianxiu.Effects of Na-Ti doping on the properties of Bi2(Zn1/3Nb2/3)2O7 ceramics[J].Electronic Components & Materials,2010,29(4). |
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| Authors: | LI Zaiying DING Shihua SONG Tianxiu |
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| Affiliation: | College of Materials Science and Engineering;Xihua University;Chengdu 610039;China |
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| Abstract: | Na-Ti doped Bi2(Zn1/3Nb2/3)O7 ceramics were prepared by the traditional solid phase reaction method. The effects of substituting Na+ for Bi3+ and Ti4+ for Nb5+ on the sintering properties, microstructure and dielectric properties of the Bi2(Zn1/3Nb2/3)2O7 ceramics were investigated. The sintering temperature of the Bi2(Zn1/3Nb2/3)2O7 ceramics is reduced from 1 000 ℃ to about 860 ℃ with the doping of Na+ and Ti4+. In the range of –30℃ to +130℃, Na-Ti doped Bi2(Zn1/3Nb2/3)O7 ceramics exhibit strong dielectric relaxation with an activation energy of about 0.3 eV. This can be attributed to the formation of defect dipole and lattice distortion in the ceramics. |
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| Keywords: | Bi2(Zn1/3Nb2/3)2O7 based ceramic dielectric relaxation ion substitution defect dipole lattice distortion |
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