Complex Impedance Spectra Analysis of SnO_2-glaze Composites  

作　　者：颜东亮 吴建青 

机构地区：[1]College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2006年第4期121-125,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by Guangdong Provincal Natural Science Foundation(No.05006564) and Science &Technology Programof GuangdongProvince(No.2004B10301007)

摘　　要：SnO2-glaze composites were prepared by Sb-doped SnO2 and SiO2-CaO-Al2O3-B2O3 glaze. The composites changed from an electrical insulator to a conductor as the SnO2 content increased from Owt% to 90 wt% . The complex impedance spectra of the fabricated composites were investigated in the frequency range of 100Hz-40 MHz and three kinds of typical shape of complex impedance spectra were recorded and analyzed. The ,spectrum is quite close to the model of conduction via nonohmic contactiug when the SnO2 content is relatively low, In high loading region, the spectrum shows the conduction pattern through ohmic contact chains . In the moderate loading region, the model is a mixture of the above two models. Equivalent circuit of the composite changes from resistor-capacitor circuit to resistor-inductor circuit as the content of SnO2 increases.SnO2-glaze composites were prepared by Sb-doped SnO2 and SiO2-CaO-Al2O3-B2O3 glaze. The composites changed from an electrical insulator to a conductor as the SnO2 content increased from Owt% to 90 wt% . The complex impedance spectra of the fabricated composites were investigated in the frequency range of 100Hz-40 MHz and three kinds of typical shape of complex impedance spectra were recorded and analyzed. The ,spectrum is quite close to the model of conduction via nonohmic contactiug when the SnO2 content is relatively low, In high loading region, the spectrum shows the conduction pattern through ohmic contact chains . In the moderate loading region, the model is a mixture of the above two models. Equivalent circuit of the composite changes from resistor-capacitor circuit to resistor-inductor circuit as the content of SnO2 increases.

关 键 词：SnO2-glaze composites impedance spectra conduction model 

分 类 号：TB332[一般工业技术—材料科学与工程]