Abstract
Nanoporous (Ba,Sr)(Ti,Sb)O 3 ceramics were fabricated by the addition of partially oxidized Ti powder of 4 wt.%, corn- and potato-starch of 20 wt.% into the (Ba,Sr)(Ti,Sb)O 3 powder, respectively. The effect of measuring atmosphere on the electrical properties of the porous (Ba,Sr)(Ti,Sb)O 3 ceramics and the role of oxygen on the grain boundaries in the PTCR characteristics of the (Ba,Sr)(Ti,Sb)O 3 ceramics were investigated. The electrical resistivity of the porous (Ba,Sr)(Ti,Sb)O 3 ceramics was measured in the air, O 2, N 2 and H 2 atmospheres during heating and cooling cycles. It was found that the PTCR characteristics and room-temperature resistivity of the porous (Ba,Sr)(Ti,Sb)O 3 ceramics decreased in reducing atmosphere mainly because of the decrease in potential barrier height, whereas it increased in oxidizing atmosphere mainly because of the increase in potential barrier height.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
