| 包覆MgO对BaTiO3基陶瓷性能的影响 |
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| 引用本文： | 曾卓玮, 丁士华, 宋天秀, 张倩, 钟祥清. Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCoxO3陶瓷的介电性能及弛豫特性研究[J]. 西华大学学报(自然科学版), 2014, 33(2): 7-10. DOI: 10.3969/j.issn.1673-159X.2014.02.002 |
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| 作者姓名： | 曾卓玮 丁士华 宋天秀 张倩 钟祥清 |
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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： | 国家自然科学基金(11074203);西华大学研究生创新基金(YCJJ201303, YCJJ201306) |
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| 摘 要： | 采用固相反应法通过施受主共掺的方式制备Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCoxO3(x=0.005，0.01，0.015，0.02)陶瓷，通过XRD和LCR表征样品的相结构和介电性能。结果表明：在所掺杂溶度范围内，陶瓷样品未出现第二相；x=0.02时样品仅表现出弥散相变铁电体的特征，晶体中缺陷偶极子以[BiBa·-Co′Ti/Zr]为主，晶体中缺陷偶极子的存在形式与介电弛豫程度相关；样品结晶化学特性说明B位离子键价与其介电常数存在反比例关系。
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| 关 键 词： | Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCoxO3陶瓷 介电弛豫 缺陷偶极子 |
| 收稿时间： | 2013-10-24 |
Size Effect on Dielectric Properties of Fine-grained BaTiO3 Ceramics |
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| ZENG Zhuo-wei, DING Shi-hua, SONG Tian-xiu, ZHANG Qian, ZHONG Xiang-qing. The Dielectric Properties and Relaxor Behaviour of Ba0.98 Bi0.02(Ti0.9Zr0.1)1-xCoxO3 Ceramics[J]. Journal of Xihua University(Natural Science Edition), 2014, 33(2): 7-10. DOI: 10.3969/j.issn.1673-159X.2014.02.002 |
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| Authors: | ZENG Zhuo-wei DING Shi-hua SONG Tian-xiu ZHANG Qian ZHONG Xiang-qing |
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| Affiliation: | School of Materials Science & Engineering, Xihua University, Chengdu 610039 China |
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| Abstract: | Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCoxO3(x=0.00, 0.005, 0.015, 0.02)ceramics were prepared by a solid phase reaction. The microstructure and dielectric properties of the ceramics were investigated by XRD and LCR. The results showed that the second phase didn't occur in doping range; when x=0.02, the ceramic was diffuse ferroelectrics. The dominant defect dipoles was [2BiBa·-Vo″], [BiBa·-Co′Ti/Zr] in crystal. The varieties of defect dipoles made a significant influence on dielectric relaxion. According to crystal chemistry results, it was concluded that the bond valance sum was inversely proportional to the dielectric constants. |
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| Keywords: | Ba0.98Bi0.02(Ti0.9Zr0.1)1-xCoxO3 ceramics dielectric relaxation defect dipoles |
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