Title of article :
Effect of reoxidation on the PTCR characteristics of porous (Ba,Sr)TiO3
Author/Authors :
Kim، نويسنده , , Jun-Gyu and Cho، نويسنده , , Won-Seung and Park، نويسنده , , Kyeongsoon، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2002
Abstract :
Semiconducting porous (Ba,Sr)TiO3 ceramics were prepared by sintering at 1350 °C in vacuum followed by reoxidation at 400–800 °C in air. The effect of reoxidation on the PTCR characteristics of the porous (Ba,Sr)TiO3 ceramics was investigated. It was found that the PTCR effect of the (Ba,Sr)TiO3 ceramics was developed at high reoxidation temperatures (≥550 °C), and also the magnitude of the PTCR effect increased with increasing reoxidation temperature. The role of oxygen on the grain boundaries in the PTCR characteristics was also discussed.
Keywords :
Sr)TiO3 ceramics , Reoxidation , PTCR , Electrical properties , Porous semiconducting (Ba
Journal title :
MATERIALS SCIENCE & ENGINEERING: B
Journal title :
MATERIALS SCIENCE & ENGINEERING: B
