{"title":"Complex impedance analyses of PTCR ceramics based on barium-lithium-bismuth titanate","authors":"T. Plutenko, O. V’yunov, A. G. Belous","doi":"10.1109/OMEE.2014.6912364","DOIUrl":null,"url":null,"abstract":"The formation of (1-x)BaTiO<sub>3</sub>-xLi<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> (0 ≤ x ≤ 0.6) solid solutions with positive temperature coefficient of resistance (PTCR) effect was studied. Powders were prepared by solid-phase reaction technique. Ceramics were sintered under reducing atmosphere N<sub>2</sub>/H<sub>2</sub> in the temperature range 1200-1450°C with subsequent oxidation in air. It was shown that minimum value of resistivity rises with increase in x value. Complex impedance analysis shown that ceramic grains of (1-x)BaTiO<sub>3</sub>-xLi<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> materials consist of three areas with different electrical properties. Boundaries and outer layers of grains make the main contribution to the PTCR effect in lithium-containing solid solutions. The potential barrier decreases with increasing x.","PeriodicalId":142377,"journal":{"name":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Conference on Oxide Materials for Electronic Engineering - fabrication, properties and applications (OMEE-2014)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/OMEE.2014.6912364","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The formation of (1-x)BaTiO3-xLi0.5Bi0.5TiO3 (0 ≤ x ≤ 0.6) solid solutions with positive temperature coefficient of resistance (PTCR) effect was studied. Powders were prepared by solid-phase reaction technique. Ceramics were sintered under reducing atmosphere N2/H2 in the temperature range 1200-1450°C with subsequent oxidation in air. It was shown that minimum value of resistivity rises with increase in x value. Complex impedance analysis shown that ceramic grains of (1-x)BaTiO3-xLi0.5Bi0.5TiO3 materials consist of three areas with different electrical properties. Boundaries and outer layers of grains make the main contribution to the PTCR effect in lithium-containing solid solutions. The potential barrier decreases with increasing x.
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