Electrical properties of copper and titanium-codoped zinc ferrites

Hsing I. Hsiang, Yi Lang Liu

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

In this study, the effects of Cu and Ti substitution on the sintering behavior, substitution mechanism, resistivity and dielectric properties of (Zn)(Cux Tix Fe1.98-2x)O3.97 were investigated using X-ray diffractometer, scanning electron microscopy, and dilatometer. The results indicate that codoped Cu2+ and Ti4+ can effectively promote zinc ferrite densification. For the samples with x = 0-0.05, Cu2+ and Ti4+ ions dissolved into the spinel structure and mainly occupied the octahedral sites, which resulted in an increase in resistivity. For the specimen with x = 0.1 and 0.2, the Cu-rich and Zn-rich precipitates occurred at the grain boundary, leading to a decrease in resistivity. The variations in dielectric constant for samples with various x values as a function of frequency can be explained using the space charge polarization arising from the differences between the conductivity of the various phases present.

原文English
頁(從 - 到)516-520
頁數5
期刊Journal of Alloys and Compounds
472
發行號1-2
DOIs
出版狀態Published - 2009 3月 20

All Science Journal Classification (ASJC) codes

  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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