Effect of Y2O3 on Phase Transformation and Dielectric Properties of Alumina Ceramics

Fen Ling Qian; Zhi Peng Xie; Zhi Yong He; Qi Fu Zhang

doi:10.4028/www.scientific.net/KEM.602-603.771

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Effect of Y2O3 on Phase Transformation and...

Effect of Y₂O₃ on Phase Transformation and Dielectric Properties of Alumina Ceramics

Abstract:

Alumina ceramics can be widely used in electro vacuum area and microwave communication industry due to its excellent dielectric properties. However, the effects of the Y₂O₃ addition on dielectric properties of alumina ceramics were rarely investigated. In this paper, alumina ceramics was prepared using Y₂O₃ as additive, via both heterogeneous precipitation method (HP) and mechanical milling method (MM). The effect of Y₂O₃ on phase transformation during sintering and dielectric properties of alumina ceramics were investigated, and the influencing mechanism was discussed. The results showed that different adding way influenced phase transformation during sintering, and polarization relaxation existed in alumina ceramics during 10³~10⁷Hz. Besides, the universal polarization relaxation relation could be applied to alumina ceramics.

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Key Engineering Materials (Volumes 602-603)

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771-776

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https://doi.org/10.4028/www.scientific.net/KEM.602-603.771

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Online since:

March 2014

Authors:

Fen Ling Qian, Zhi Peng Xie*, Zhi Yong He, Qi Fu Zhang

Keywords:

Dielectric Property, Heterogeneous Precipitation Method, Phase Transformation, Polarization Relaxation

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