• Electrical properties of Ba0.7Bi0.3Fe0.9Sn0.1O3–BaCo$_{0.02}^{II}$ Co$_{0.04}^{III}$Bi0.94O3 thick film thermistors with wide-range adjustable parameters

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      https://www.ias.ac.in/article/fulltext/boms/037/02/0263-0271

    • Keywords

       

      Thick film thermistors; microstructures; electrical properties; impedance spectroscopy.

    • Abstract

       

      A novel (1−𝑥)Ba0.7Bi0.3Fe0.9Sn0.1O3-𝑥BaCo$_{0.02}^{II}$ Co$_{0.04}^{III}$Bi0.94O3 (0.2 ≤ 𝑥 ≤ 0.9) negative temperature coefficient (NTC) thick film thermistors with high thermistor constant was prepared by screen printing. The values of room-temperature resistivity, thermistor constant and activation energy of the thick film thermistors, increasing with the addition of Ba0.7Bi0.3Fe0.9Sn0.1O3, are in the range of 35.5 𝛺cm-1.34 M𝛺 cm, 2067–6139 K and 0.177-0.527 eV, respectively. This means that the electrical properties of the thick films are adjustable at a wide range, depending on the compositions. Impedance analysis shows that the magnitude of thick film bulk resistance is mainly attributed to the contribution of grain boundary.

    • Author Affiliations

       

      Changlai Yuan1 Yun Yang1 Ying Luo2 Ling Yang1 Guohua Chen1 Xinyu Liu1

      1. School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541 004, People's Republic of China
      2. Guilin Academy of Air Force, Guilin 541 004, People's Republic of China
    • Dates

       
  • Bulletin of Materials Science | News

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