Abstract
La, Mn-codoped BaTiO3 ceramics were prepared by using high purity starting materials to clarify the influence of Mn addition on the positive temperature coefficient of resistivity (PTCR) effect. No sintering aids such as SiO2 and excess TiO2 were used. Resistivity at room temperature, grain growth and Curie temperature (TC) were studied as functions of Mn content. The Curie temperature of La-doped BaTiO3 increased initially and then decreased with increasing Mn addition, and the Mn concentration of giving the maximun TC depended on the doping concentration of La. This newly observed phenomenon is interpreted in terms of the state of Mn in the compound in connection with the variation of its bulk and grain boundary resistivity. The largest PTCR effect was observed around the concentration of Mn giving the maximum TC.
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.
