Al_2O_3含量对ZnO线性陶瓷电阻微观结构和电气性能的影响
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摘要
改变Al_2O_3浓度,研究其对ZnO线性陶瓷电阻微观结构和电气性能的影响。通过XRD,SEM和一些电测设备对所制得的ZnO线性电阻进行综合分析。结果表明,提高Al_2O_3含量能增大ZnO线性陶瓷的电阻率,同时对其高线性度几乎没有影响。当Al_2O_3含量为1.5wt.%时,制得ZnO线性陶瓷密度为4.28 g·cm~(-3),电阻率为821Ω·cm,非线性系数为1.00,温阻系数为1.21×10~(-3)/℃,能量密度为495 J·cm~(-3),综合电气性能表现良好。
The concentration of Al_2O_3 was changed to study its effect on the microstructure and electrical properties of ZnO linear ceramic resistors.The linear resistance of the prepared ZnO was comprehensively analyzed by XRD,SEM and some electrical measuring equipment.The results show that increasing the Al_2O_3 content can increase the resistivity of ZnO linear ceramics,but has little effect on its high linearity.When the Al_2O_3 content is 1.5wt.%,the linear ceramic density of ZnO is 4.28 g·cm~(-3),the resistivity is 821Ω·cm,the nonlinear coefficient is 1.00,the temperature coefficient is 1.21×10~(-3)/°C,and the energy density is 495 J·cm~(-3),the overall electrical performance is better.
The concentration of Al_2O_3 was changed to study its effect on the microstructure and electrical properties of ZnO linear ceramic resistors.The linear resistance of the prepared ZnO was comprehensively analyzed by XRD,SEM and some electrical measuring equipment.The results show that increasing the Al_2O_3 content can increase the resistivity of ZnO linear ceramics,but has little effect on its high linearity.When the Al_2O_3 content is 1.5wt.%,the linear ceramic density of ZnO is 4.28 g·cm~(-3),the resistivity is 821Ω·cm,the nonlinear coefficient is 1.00,the temperature coefficient is 1.21×10~(-3)/°C,and the energy density is 495 J·cm~(-3),the overall electrical performance is better.
引文
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[2]程杰,袁方利,季幼章.一种新型的电阻元器件高能ZnO线性电阻的应用[J].电瓷避雷器,1992,(5):58-59.CHENG J,YUAN F L,JI Y Z.Electric Ceramic Arrester,1992,(5):58-59.
[3]SHIRAKAWA S,OWADA S,IIMURA N,et al.Application and development of a ceramics resistor for use as a neutral grounding resistor(NGR)[J].IEEE Transactions on Power Delivery,1988,3(1):183-186.
[4]GUPTA T K.Application of zinc oxide varistors[J].Journal of the American Ceramic Society,2010,73(7):1817-1840.
[5]BERNIK S,DANEU N.Characteristics of ZnO-based varistor ceramics doped with Al2O3[J].Journal of the European Ceramic Society,2007,27(10):3361-3170.
[6]LEITE E R,NOBRE M A L,LONGO E.Microstructural development of ZnO varistor during reactive liquid phase sintering[J].Journal of Materials Science,1996,31(20):5391-5398.
[7]ZHU J F,ZHOU Y.Effect of calcination of the raw materials on the microstructure and electrical properties of ZnO-based linear resistance ceramics[J].Journal of Materials Science:Materials in Electronics,2012,23(2):445-450.
[8]赵静,刘丽杰,蔡宁,等.掺杂量对ZnO陶瓷靶材性能影响的研究[J].人工晶体学报,2009,38(3):772-776.ZHAO J,LIU L J,CAI N,et al.Journal of Synthetic Crystals,2009,38(3):772-776.
[9]BARJ M,BOCQUET J F,CHHOR K,et al.Submicronic MgAl2O4 powder synthesis in supercritical ethanol[J].Journal of Materials Science,1992,27(8):2187-2192.
[10]VISWABASKARAN V,GNANAMFD,BALASUBRAMANIAN M.Mullite from clay-reactive alumina for insulating substrate application[J].Applied Clay Science,2004,25(1):29-35.
[11]MIZUKOSHI A,OZAWA J,SHIRAKAWA S,et al.Influence of uniformity on energy absorption capabilities of zinc oxide elements as applied in arresters[J].IEEE Transactions on Power Apparatus&Systems,1983,102(5):1384-1390.