| 铈镧复合氧化物对ZnVCrO陶瓷显微结构及压敏性能的影响 |
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| 引用本文： | 赵鸣,李天宇,石钰.铈镧复合氧化物对ZnVCrO陶瓷显微结构及压敏性能的影响[J].材料导报,2017,31(6):120-124. |
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| 作者姓名： | 赵鸣 李天宇 石钰 |
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| 作者单位： | 内蒙古科技大学,内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,包头014010 |
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| 基金项目： | 内蒙古自治区草原英才“白云鄂博矿多金属资源综合利用”创新团队基金;“冶金、能源与资源高效利用科技创新团队”创新团队专项基金(20090401) |
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| 摘 要： | 采用混合氧化物工艺经850℃、4h烧结制备了铈镧复合氧化物掺杂的ZnVCrO基压敏陶瓷,综合应用XRD、SEM、EDS和伏安电学特性测试等方法研究了铈镧复合氧化物掺杂在0%~0.6%(质量分数)范围内对显微结构和压敏性能的影响。结果显示,所有样品以ZnO为主晶相,以Zn_3(VO_4)_2、ZnCr_2O_4为第二相,含掺杂样品中还形成Ce(La)VO_4固溶体,其含量随掺杂量增加而升高。铈镧复合氧化物对烧结影响不大,但其含量大于等于0.4%(质量分数)时可大幅提高ZnVO基压敏陶瓷显微组织的均匀性。0.4%(质量分数)铈镧复合氧化物掺杂样品压敏性能最优:非线性系数为24.7,压敏电压为1 029V/mm,漏电流为92μA/cm~2。
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| 关 键 词： | 铈镧复合氧化物 ZnVCrO 压敏陶瓷 显微结构 |
Effect of Ce-La Oxide Composite on the Microstructure and Varistor Properties of ZnVCrO Based Ceramics |
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| ZHAO Ming,LI Tianyu and SHI Yu.Effect of Ce-La Oxide Composite on the Microstructure and Varistor Properties of ZnVCrO Based Ceramics[J].Materials Review,2017,31(6):120-124. |
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| Authors: | ZHAO Ming LI Tianyu and SHI Yu |
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| Affiliation: | Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metallic Resources, Inner Mongolia University of Science and Technology, Baotou 014010,Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metallic Resources, Inner Mongolia University of Science and Technology, Baotou 014010 and Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metallic Resources, Inner Mongolia University of Science and Technology, Baotou 014010 |
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| Abstract: | ZnVCrO based ceramics with 0％-0.6％ Ce-La oxide composite were synthesized by traditional mixing oxide procedure,sintering at 850 ℃ for 4 hours.XRD,SEM,EDS and V-Ⅰ test were used to investigate the dopant effect on the microstructure and varistor properties of the obtained ceramics.The results showed Zn3 (VO4)2,ZnCr2O4 were the secondary crystalline phases within the ceramics in addition to ZnO primary phase.Ce(La)VO4 solid solution was an additional secondary crystalline phase in the ceramics with Ce-La oxide composite and the amount of additional secondary phase increased with the further addition of the dopant.Composite dopant of more than 0.4wt％ could greatly improve the microstructural homogeneity of ZnVCrO based ceramics,and the variation of its content showed no major influenceon sintering.The ceramic with 0.4wt％ Ce-La composite has the optimum varistor properties:nonlinear coefficient was 24.7,breakdown field was 1 029 V/mm,leak current density was 92 μA/cm2. |
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| Keywords: | Ce-La oxide composite ZnVCrO varistor ceramic microstructure |
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