| 降温过程对BaTiO_3陶瓷本征PTC效应的影响 |
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| 引用本文： | 周勇辉,徐国跃,周斌,凌栋.降温过程对BaTiO_3陶瓷本征PTC效应的影响[J].电子元件与材料,2006,25(3):40-42. |
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| 作者姓名： | 周勇辉 徐国跃 周斌 凌栋 |
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| 作者单位： | 南京航空航天大学材料科学与技术学院,江苏,南京,210016 |
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| 摘 要： | 在空气气氛中,于1350℃保温1 h的相同条件下,采用不同的降温制度,制备了一系列BaTiO3陶瓷样品。测试了R-θ(阻–温)曲线,采用XRD以及SEM等手段,分析了样品的物相及微观形貌。实验结果表明:BaTiO3陶瓷在1 200℃保温2~4h,能够获得晶粒尺寸10μm、较均匀、PTC效应相对较高(3.52×104)的样品。还分析了PTC效应与降温温度的关系。
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| 关 键 词： | 电子技术 PTC效应 钛酸钡 晶界 |
| 文章编号： | 1001-2028（2006）03-0040-03 |
| 收稿时间： | 2005-09-09 |
| 修稿时间： | 2005-09-09 |
Effect of Cooling Process on BaTiO3-based PTC Ceramics |
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| ZHOU Yong-hui,XU Guo-yue,ZHOU Bin,LING Dong.Effect of Cooling Process on BaTiO3-based PTC Ceramics[J].Electronic Components & Materials,2006,25(3):40-42. |
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| Authors: | ZHOU Yong-hui XU Guo-yue ZHOU Bin LING Dong |
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| Abstract: | A series of BaTiO3 ceramics were fabricated by soaking one hour at 1 350℃ and using different cooling schedules in air condition.The resistance versus temperature curves were measured,XRD and SEM were used to study the phases and micrographs.The results indicate that uniform grains and samples with grain size of 10 μm can be obtained,and the PTC effect can be enhanced to 3.52×104 after maintaining the samples at 1 200℃ during cooling for 2~4 hours.The relation between PTC effect and cooling temperature is also analyzed. |
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| Keywords: | electronic technology PTC effect barium titanate grain boundary |
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