| Effects of Dysprosium Oxide Doping on Microstructure and Properties of Barium Titanate Ceramic |
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| 引用本文： | 蒲永平,任慧君,陈维,陈寿田. Effects of Dysprosium Oxide Doping on Microstructure and Properties of Barium Titanate Ceramic[J]. 中国稀土学报(英文版), 2005, 23(4): 442-445 |
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| 作者姓名： | 蒲永平 任慧君 陈维 陈寿田 |
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| 作者单位： | State Key LaboratoryofElectrical Insulationfor Power Equipment，Xi′an Jiaotong University，Xi′an 710049，China，Shaanxi University ofScience and Technology，Xianyang 712081，China，Shaanxi University ofScience and Technology，Xianyang 712081，China，State Key LaboratoryofElectrical Insulationfor Power Equipment，Xi′an Jiaotong University，Xi′an 710049，China，State Key LaboratoryofElectrical Insulationfor Power Equipment，Xi′an Jiaotong University，Xi′an 710049，China |
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| 摘 要： | With the development of mixed integrated cir-cuits , mini mization of high voltage ceramic capacitorcomponents usedin high voltage outletsis required .Inthe past ,the breakdown voltage was raised mainly byincreasingthethickness of capacitors .Butthe most …
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| 关 键 词： | 无机非金属材料 钛酸钡陶瓷 掺杂 氧化镝 显微结构 性能 |
| 文章编号： | 1002-0721（2005）04-0442-04 |
| 收稿时间： | 2004-07-17 |
| 修稿时间： | 2004-11-10 |
Effects of Dysprosium Oxide Doping on Microstructure and Properties of Barium Titanate Ceramic |
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| Pu Yongping,Ren Huijun,Chen Wei,Chen Shoutian. Effects of Dysprosium Oxide Doping on Microstructure and Properties of Barium Titanate Ceramic[J]. Journal of Rare Earths, 2005, 23(4): 442-445 |
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| Authors: | Pu Yongping Ren Huijun Chen Wei Chen Shoutian |
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| Abstract: | Different amounts of dysprosium oxide were incorporated into barium titanate powders synthesized by hydrothermal method. Relations of substitution behaviors and lattice parameters with solid-solubility were studied. Furthermore, the influences of dysprosium oxide doping fraction on grain size and dielectric properties of barium titanate ceramic, including dielectric constant and breakdown electric field strength, were investigated via scanning electron microscope, X-ray diffraction and electric property tester. The results show that dysprosium oxide can restrain abnormal grain growth during sintering and that fine-grained and high density of barium titanate ceramic can result in excellent dielectric properties. As mass fraction of dysprosium oxide is 0.6%, the lattice parameters of grain increase to the maximum because of the lowest vacancy concentration. The electric property parameters are cited as following: dielectric constant (25 ℃) reaches 4100, the change in relative dielectric constant with temperature is -10% to 10% within the range of -15～100 ℃, breakdown electric field strength (alternating current) achieves 3.2 kV·mm-1, which can be used in manufacturing high voltage ceramic capacitors. |
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| Keywords: | inorganic nonmetallic material dysprosium oxide doping microstructure and properties barium titanate ceramic rare earths |
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