Effect of the Sintering Temperature and Atmosphere on the Grain Growth and Grain Boundary Phase Formation of Pr-Doped ZnO Varistor

DOI Web Site Web Site 3 Citations 22 References
  • SIDA Masato
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology
  • CHUN Seong-Yong
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology
  • WAKIYA Naoki
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology
  • SHINOZAKI Kazuo
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology
  • MIZUTANI Nobuyasu
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology

Bibliographic Information

Other Title
  • Pr系ZnOバリスターの粒成長と粒界相の生成に及ぼす焼成温度と雰囲気の影響
  • Prケイ ZnO バリスター ノ リュウ セイチョウ ト リュウカイソウ ノ

Search this article

Abstract

Effect of sintering temperature, atmosphere and concentration of Pr oxide on the grain growth and grain boundary formation of Pr-doped ZnO was investigated. Grain size of ZnO was maximized at composition of Pr 0.5mol% and grain growth rate and weight loss rate of 0.5mol% Pr-doped ZnO increased drastically above 1350°C, regardless of the sintering atmosphere. The morphology of grain boundary in samples fired above 1350°C was strongly affected by the sintering atmosphere. The grain growth rate was proportional to 1/n-th power of time, with n=4.5 between 1300°C and 1400°C and n=2.2 at 1500°C. An exothermic peak in DTA was observed at 1380°C, which indicated the formation of a liquid phase.

Journal

Citations (3)*help

See more

References(22)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top