Cooling rate effects on the electrical properties of TiO2-based varistor

Hsing I. Hsiang, Shi Shu Wang

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)

摘要

The cooling rate effects on the microstructure development and electrical properties of TiO2 ceramics are studied using transmission electron microscopy (TEM), energy dispersion spectrometer (EDS) and X-ray diffractometer (XRD). Barium and bismuth were exsolved during cooling and reacted with rutile to form secondary phases, Ba2Ti9O20 and Bi 2Ti4O11. Therefore, the acceptor concentration of Bi+3 (BiTi′) in the rutile grain near the grain boundary areas in furnace-cooled samples were lower than that in quenched samples. As the acceptor concentration decreased, the depletion width and barrier height decreased. Consequently, the quenched samples possessed higher nonlinear exponent (α) values than furnace-cooled samples.

原文English
頁(從 - 到)25-29
頁數5
期刊Materials Science and Engineering B: Solid-State Materials for Advanced Technology
128
發行號1-3
DOIs
出版狀態Published - 2006 三月 15

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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