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ZrO2掺杂ZnO压敏瓷的性能及晶粒生长研究

DOI: 10.16188/j.isa.1003-8337.2015.04.015, PP. 73-77

Keywords: 压敏电阻,氧化锌,电性能,晶粒生长,显微组织

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Abstract:

以球磨法制备ZrO2掺杂ZnO压敏瓷,通过扫描电镜对其显微组织进行了分析,探讨了ZrO2掺杂对ZnO压敏瓷电性能的影响并且研究了晶粒的生长。研究结果表明,随着保温时间的延长,致密度和非线性系数均呈现先增加后减小的趋势;而对ZnO压敏瓷的漏电流和电位梯度的影响则呈现先减小后增加的波浪型变化。ZrO2掺杂ZnO压敏瓷的晶粒尺寸要比基础配方ZnO压敏瓷的晶粒尺寸要小,可能是因为Zr原子半径与Zn原子半径接近,ZrO2固溶在氧化锌晶粒中,抑制了氧化锌晶粒尺寸的增长。由计算可得ZrO2掺杂氧化锌压敏瓷的晶粒生长动力指数(n=5.0)比基础配方氧化锌压敏瓷的晶粒生长动力指数(n=3.9)大。球磨基础配方的ZnO-Bi2O3系压敏瓷的晶粒生长激活能(Q)较大,Q=(231±27)kJ/mol。这可能是ZrO2协同尖晶石钉扎在ZnO压敏瓷的晶粒边界,通过颗粒阻滞机理使ZnO压敏瓷的晶粒生长速度降低,从而使ZnO压敏瓷的晶粒生长激活能增大。

References

[1]  XU D,CHENG X N,ZHAO G P,et al. Microstructure and electrical properties of Sc2O3-doped ZnO-Bi2O3-based varistor ceramics[J]. Ceramics International,2011,37(3):701-706.
[2]  XU D,SHI X F,CHENG X N,et al. Microstructure and electrical properties of Lu2O3-doped ZnO-Bi2O3-based varistor ceramics[J]. Transactions of Nonferrous Metals Society of China,2010,20(12):2303-2308.
[3]  徐东,程晓农,徐红星,等. 烧结温度对氧化锌压敏瓷显微组织和电性能的影响[J]. 河南科技大学学报:自然科学版,2009,30(6):8-11. XU Dong,CHENG Xiaonong,XU Hongxing,et al. Effect of sintering temperature on microstructure and electrical properties of ZnO-Bi2O3-based varistor ceramics[J]. Journal of Henan University of Science and Technology: Natural Science,2009,30(6):8-11.
[4]  SANTOS P A,MARUCHIN S,MENEGOTO G F,et al. The sintering time influence on the electrical and microstructural characteristics of SnO2 varistor[J]. Materials Letters,2006,60(12):1554-1557.
[5]  HOUABES M,BERNIK S,TALHI C,et al. The effect of aluminium oxide on the residual voltage of ZnO varistors[J]. Ceramics International,2005,31(6):783-789.
[6]  NAHM C W. Influence of sintering time on electrical and dielectric behavior, and DC accelerated aging characteristics of Dy3+-doped ZnO-Pr6O11-based varistors[J]. Materials Chemistry and Physics,2005,94(2-3):275-282.
[7]  HNG H H,CHAN P L. Microstructure and current-voltage characteristics of ZnO-V2O5-MnO2 varistor system[J]. Ceramics International,2004,30(7):1647-1653.
[8]  章天金,周东祥,姜胜林. Al2O3掺杂ZnO压敏陶瓷的晶粒生长研究[J]. 功能材料,2000,31(5):519-521. ZHANG Tianjin,ZHOU Dongxiang,JIANG Shenglin. Grain growth of sintered ZnO with Al2O3 addition[J]. Journal of Functional Materials,2000,31(5):0519-0521
[9]  SENDA T,BRADT R C. Grain growth in sintered ZnO and ZnO-Bi2O3 ceramics[J]. Journal of the American Ceramic Society,1990,73(1):106-114.
[10]  BUENO P R,VARELA J A,LONGO E. SnO2, ZnO and related polycrystalline compound semiconductors: an overview and review on the voltage-dependent resistance (non-ohmic) feature[J]. Journal of the European Ceramic Society,2008,28(3):505-529.
[11]  GHENO S M,KIMINAMI R H G A,MORELLI M R,et al. Electric force microscopy investigations of barrier formations in ZnO-based varistors[J]. Journal of the European Ceramic Society, Electroceramics XI Special Issue,2010,30(2):549-554.
[12]  HUAN C,GANG F. Influence of ionic bismuth on intrinsic defects in ZnO varistors[J]. Solid-State Electronics, 2012,67(1):27-29.
[13]  CHENG L H,LI G R,YUAN K Y,et al. Improvement in nonlinear properties and electrical stability of ZnO varistors with B2O3 additives by nano-coating method[J]. Journal of the American Ceramic Society,2012,95(3):1004-1010.
[14]  王矜奉,陈洪存,王文新,等. Zr掺杂的SnO2瓷的压敏和介电性质[J]. 电子元件与材料,2003,22(4):8-10. WANG Jinfeng,CHEN Hongcun,WANG Wenxin,et al. Voltage-sensitive and dielectric properties of Zr-doped SnO2 ceramics[J]. Electronic Components & Materials, 2003,22(4):8-10.
[15]  XU D,CHENG X N,YUAN H M,et al. Microstructure and electrical properties of Y(NO3)3?6H2O-doped ZnO-Bi2O3-based varistor ceramics[J]. Journal of Alloys and Compounds,2011,509(38):9312-9317.
[16]  XU D,WANG B,LIN Y H,et al. Influence of Lu2O3 on electrical and microstructural properties of CaCu3Ti4O12 ceramics[J]. Physica B: Condensed Matter,2012,407(13):2385-2389.
[17]  XU D,ZHANG C,CHENG X N,et al. Dielectric properties of Zn-doped CCTO ceramics by sol-gel method[J]. Advanced Materials Research,2011,197-198:302-305.
[18]  XU D,ZHANG C,LIN Y H,et al. Influence of zinc on electrical and microstructural properties of CaCu3Ti4O12 ceramics prepared by Sol-Gel process[J]. Journal of Alloys and Compounds,2012,522(0):157-161.

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