| ZnO压敏陶瓷的晶界结构 |
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| 引用本文： | 康雪雅,陶明德,涂铭旌.ZnO压敏陶瓷的晶界结构[J].材料研究学报,1996,10(3):301-303. |
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| 作者姓名： | 康雪雅 陶明德 涂铭旌 |
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| 作者单位： | [1]中国科学院新疆物理研究所 [2]四川联合大学 |
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| 摘 要： | 用ＸＲＤ、ＳＥＭ、ＴＥＭ研究了低压ＺｎＯ压敏陶瓷的相结构与晶界结构，证实了晶界相的不连续性，发现低压ＺｎＯ－Ｂｉ２Ｏ３－ＴｉＯ２系中ＺｎＯ－ＺｎＯ晶粒直接接触区晶界宽度约为４５ｎｍ，以及烧结过程中晶界上ＺｎＯ纳米级单晶的迁移行为并计算出ＺｎＯ晶界移动激活能Ｑｍ。
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| 关 键 词： | 压敏陶瓷 晶界结构 氧化锌 |
| 收稿时间： | 1996-06-25 |
| 修稿时间： | 1996-06-25 |
GRAIN-BOUNDARY STRUCTURE OF ZnO VARISTOR CERAMIC |
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| KANG Xueya,TAO Mingde TU Mingjing.GRAIN-BOUNDARY STRUCTURE OF ZnO VARISTOR CERAMIC[J].Chinese Journal of Materials Research,1996,10(3):301-303. |
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| Authors: | KANG Xueya TAO Mingde TU Mingjing |
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| Affiliation: | KANG Xueya,TAO Mingde (Xingjiang,Institute of physics,Chinese Academy of Sciences)TU Mingjing (Sichuan Unite University)(Correspondent:KANG Xueya,Xingjiang institute of Physics,Chinese Academy of Sciences,Wulumqi(Urumqi) ) |
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| Abstract: | A microstructural evaluation of a low-voltage ZnO varistor ceramic was made by scanning and transmission electron microscopy.It is suggested that the ZnO grains are mostly in direct contact with each other and that the intergranular phase is located primarily in the multiple grain junctions.In those regions where ZnO grains are in contact with each other,the measured grain-boundary width is about 45nm. It is found that nano-meter ZnO grains on the Bi-rich intergranular film. Shifting activation energy Qm of ZnO grain-boundary was calculated. |
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| Keywords: | ZnO varistor ceramic grain-boundary structure |
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