| Ho3+离子在BaTiO3陶瓷中自补偿模式探索及反常介电性质 |
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| 引用本文： | 高祥禄,路大勇. Ho3+离子在BaTiO3陶瓷中自补偿模式探索及反常介电性质[J]. 吉林化工学院学报, 2019, 36(3): 74-77. DOI: 10.16039/j.cnki.cn22-1249.2019.03.015 |
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| 作者姓名： | 高祥禄 路大勇 |
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| 作者单位： | 吉林化工学院 材料科学与工程研究中心 |
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| 基金项目： | 吉林省科技发展计划项目 |
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| 摘 要： | 采用冷压陶瓷技术制备(Ba1-xHox)(Ti1-xHox)O3（简称BHTH）陶瓷. 通过X射线衍射（XRD）、电子顺磁共振（EPR）和介电温谱技术研究了BHTH陶瓷的结构、位占据和介电性质. 结果表明：Ho3+离子在BaTiO3陶瓷中能够形成自补偿模式，且具有轻微的Ba位占据倾向. 在BHTH陶瓷中，固溶度为x = 0.03. BHTH陶瓷的介电行为表现出一个反常现象：随着x从0.01增至0.03，居里温度TC向高温移动，即TC从128℃升到131℃. BHTH晶体结构的四方度（c/a）随着x增加是TC向高温移动的主要原因.
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| 关 键 词： | 钬掺杂钛酸钡 X射线衍射 自补偿模式 电子顺磁共振 介电性质 |
Abnormal Dielectric Properties and Exploration of Self-compensation Mode of Ho~(3+) in BaTiO_3 Ceramics |
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| GAO Xianglu,LU Dayong. Abnormal Dielectric Properties and Exploration of Self-compensation Mode of Ho~(3+) in BaTiO_3 Ceramics[J]. Journal of Jilin Institute of Chemical Technology, 2019, 36(3): 74-77. DOI: 10.16039/j.cnki.cn22-1249.2019.03.015 |
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| Authors: | GAO Xianglu LU Dayong |
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| Abstract: | (Ba1-xHox)(Ti1-xHox)O3ceramics (BHTH) were prepared using the cold-pressing ceramic technique. The structure, site occupations, and dielectric properties of BHTH were investigated using X-ray diffraction (XRD), electron paramagnetic resonance (EPR) and dielectric-temperature measuring techniques. The results indicated that Ho3+ ions in the BaTiO3 lattice could form a self-compensation mode with a slight Ba-site-occupation preference. The solubility limit was determined to be x = 0.03 in BHTH. The dielectric behavior of BHTH showed an abnormal phenomenon, i.e. that the Curie temperature (TC) shifted towards high temperatures from 128 °C at x = 0.01 to 131 °C at x = 0.03. The increase in tetragonality (c/a) of the crystal structure of BHTH is the main reason of the increase in TC. |
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| Keywords: | Ho-doped BaTiO3 X-ray diffraction self-compensation electron paramagnetic resonance dielectric properties |
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