Fabrication and characterization of zinc phosphate passivation layers for ZnO-based varistor

W. S. Lee, W. T. Chen, Tony Yang, Y. C. Lee, C. Y. Su, S. P. Lin, C. L. Hu

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

The chemical and morphological modification of zinc phosphates as a protection layer for ZnO-based varistor has been made through the addition of Mg or Ca species to the conversion solution combined with the calcinations of zinc phosphates. The results showed that the aspect ratio of as-coated zinc phosphates grains can be greatly reduced through the addition of Mg or Ca species. Moreover, the introduction of calcination to zinc phosphate not only makes the coating layer more dense, smooth, and resistive, but also results in the increase in capacitance, non-linear coefficient (α). On the other hand, loss tangent and breakdown voltage are both slightly decreased with increasing calcination temperatures. The increase in capacitance after calcinations may result from both the re-crystallization of Bi2O3-containing grain boundary phase and the reduction of oxygen vacancies.

原文English
頁(從 - 到)3279-3285
頁數7
期刊Journal of the European Ceramic Society
26
發行號15
DOIs
出版狀態Published - 2006

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 材料化學

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