Effect of atmosphere on PTCR behavior of Y3+ doped Ba0,77Ca0,23TiO3 ceramics

Authors

  • J. C. A. Santos
  • R. S. Silva

Keywords:

Thermistor, Ceramics, Barium calcium titanate

Abstract

Ceramics materials presenting positive coefficient of resistance with temperature (PTCR) based on BaTiO3 are widely applied in electronic industry as thermistor devices. In this work, we have studied the synthesis, sintering and electrical characterization of the barium calcium titanate ceramics (Ba0. 77Ca0.23TiO3 - BCT) doped with 0.3 mol% of Y3+ in order to study of PTCR behavior. The powder synthesis was performed by the polymeric precursor method and sintered in electric oven at controlled atmosphere. The synthesis and characterization were performed using the X-ray diffraction and impedance spectroscopy techniques. The calcined powders at 1200 °C presented a majority BCT phase and after sintering at 1350 °C for 2h, 4h and 6h, the single crystalline phase was obtained. We have observed that the sintered ceramics in reducing atmosphere showed better PTCR behavior when compared to that sintered in open atmosphere.

Downloads

Published

2012-06-22

How to Cite

Santos, J. C. A., & Silva, R. S. (2012). Effect of atmosphere on PTCR behavior of Y3+ doped Ba0,77Ca0,23TiO3 ceramics. Scientia Plena, 8(3(b). Retrieved from https://scientiaplena.org.br/sp/article/view/958

Issue

Vol. 8 No. 3(b) (2012): March/Março 2012

Section

Articles

License

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work