| 双施主掺杂对BaTiO_3基PTC陶瓷性能的影响 |
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| 引用本文： | 谢志勇,马卫兵,曲远方,卢艳.双施主掺杂对BaTiO_3基PTC陶瓷性能的影响[J].电子元件与材料,2003,22(1):11-12,16. |
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| 作者姓名： | 谢志勇 马卫兵 曲远方 卢艳 |
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| 作者单位： | 天津大学材料学院,天津,300072 |
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| 摘 要： | 研究了Nb2O5和Y2O3双施主一次掺杂对PTC BaTiO3陶瓷性能的影响。探讨了Nb2O5和Y2O3的作用机制,结果表明:Nb2O5主要是起施主作用;而Y2O3既可作为施主,又可起受主作用。添加适量的Y2O3,不仅可以降低电阻率,还可以提高升阻比。另外,还对改变施主掺杂顺序所产生的PTC效果进行了比较,发现施主二次掺杂的效果不如一次掺杂好。
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| 关 键 词： | PTC热敏电阻 钛酸钡 双施主掺杂 电阻率 升阻比 掺杂顺序 |
| 文章编号： | 1001-2028(2003)01-0011-02 |
Influence of Nb2O5 / Y2O3 Doping on the Behaviors of BaTiO3-based PTC Ceramics |
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| XIE Zhi-yong,MA Wei-bing,QU Yuan-fang,LU Yan.Influence of Nb2O5 / Y2O3 Doping on the Behaviors of BaTiO3-based PTC Ceramics[J].Electronic Components & Materials,2003,22(1):11-12,16. |
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| Authors: | XIE Zhi-yong MA Wei-bing QU Yuan-fang LU Yan |
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| Abstract: | The influence of Nb2O5/Y2O3 doping on the behaviors of BaTiO3-based PTC ceramics was investigated. The function of Nb2O5 and Y2O3 in BaTiO3-based PTC ceramics was studied and it was found that Nb2O5 acts mainly as a donor; Y2O3 acts not only as a donor, but also as an acceptor. By doping Y2O3, the specific resistance may reduce and the ratio of rmax / rmin increase. It is found that PTC behaviors are better when doping is done before the first ball milling than before the second ball mill. |
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| Keywords: | PTC thermistor BaTiO3 double-donor doping specific resistance ratio of rmax / rmin doping-sequence |
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