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.

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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://www.scientiaplena.org.br/sp/article/view/958

Issue

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

Section

Articles

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