Abstract
In this study, We have been investigated the effect of calcination temperature and high-energy ball-milling of powder influences the <TEX>$BaTiO_3$</TEX>-based PTCR(Positive Temperature coefficient Resistance) characteristics and microstructure. The mixed powder was obtained from <TEX>$BaCO_3$</TEX>, <TEX>$TiO_2$</TEX>, <TEX>$CeO_2$</TEX> ball-milled in attrition mill. The mixed powder was calcine from 1000 <TEX>$^{\circ}C$</TEX> to 1200 <TEX>$^{\circ}C$</TEX> in air and then it was sintered in reduction- re-oxidation atmosphere. As a result, The room-temperature electrical resistivity decreased and increased with increasing calcination temperature. specially, Attrition milled powder could have low room-temperature resistivity and high PTC jump order at 1100 <TEX>$^{\circ}C$</TEX>. attrition milling had lower room-temperature resistivity than ball milling. Particle size decreased by Attrition milling of powder influences in calcination temperature and room-temperature resistivity.
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