Effects of substitution of Sr and Ca for Ba sites on the room temperature resistivity and positive temperature coefficient of resistance (PTCR) characteristics of Er-doped BaTiO3 have been studied. In (Ba0.996−xSrxEr0.004)0.997TiO3 system, the room temperature resistivity (ρ25) and temperature coefficient of resistance (TCR, α) decreased with increasing Sr contents. As SrO content was increased, Curie temperature shifted to lower temperatures by 2.6°C/mol%. The room temperature resistivity also decreased with increasing CaO contents in (Ba0.996−yCayEr0.004)0.997TiO3 system. However, the shift in Curie point was negligibly small with increasing CaO contents. The system co-doped with 10 mol% SrO and 10 mol% CaO, (Ba0.796Sr0.10Ca0.10Er0.004)0.997TiO3 showed the lowest room temperature resistivity (3.5Ωcm).
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机译：研究了Sr和Ca对BA位点对室温电阻率和正温度系数的影响，耐掺杂BATIO 3 的抗性抗性抗性效应（PTCR）特性。 （BA 0.996-X / INF> SR X / INF>） 0.004 ） 0.997 TIO 3 系统，使用含量增加，室温电阻率（ρ 25 ）和温度抗性系数（TCR，α）降低。随着SRO含量增加，居里温度将较低的温度升至2.6°C / mol％。随着CAO含量增加（BA 0.996-Y CA Y ER 0.004 ） 0.99 ，室温电阻率也降低了降低7tio 3 系统。然而，随着CAO内容的增加，居里点的转变忽略了很小。该系统共掺杂10mol％SrO和10mol％CaO，（Ba 0.796 SR 0.10 CA 0.10 E R0。 004 ） 0.997 TIO 3 显示最低的室温电阻率（3.5Ωcm）。
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