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

Hsing I. Hsiang; Shi Shu Wang

doi:10.1016/j.mseb.2005.11.001

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

Hsing I. Hsiang, Shi Shu Wang

Department of Resources Engineering

Research output: Contribution to journal › Article

9 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	25-29
Number of pages	5
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	128
Issue number	1-3
DOIs	https://doi.org/10.1016/j.mseb.2005.11.001
Publication status	Published - 2006 Mar 15

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.mseb.2005.11.001

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Hsiang, H. I., & Wang, S. S. (2006). Cooling rate effects on the electrical properties of TiO₂-based varistor. Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 128(1-3), 25-29. https://doi.org/10.1016/j.mseb.2005.11.001

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