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    Effects of Al2O3 addition on the sintering behavior and microwave dielectric properties of CaSiO3 ceramics

    Access Status
    Fulltext not available
    Authors
    Wang, H.
    Chen, J.
    Yang, W.
    Feng, S.
    Ma, H.
    Jia, Guohua
    Xu, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, H. and Chen, J. and Yang, W. and Feng, S. and Ma, H. and Jia, G. and Xu, S. 2012. Effects of Al2O3 addition on the sintering behavior and microwave dielectric properties of CaSiO3 ceramics. Journal of European Ceramic Society. 32 (3): pp. 541-545.
    Source Title
    Journal of European Ceramic Society
    DOI
    10.1016/j.jeurceramsoc.2011.09.014
    ISSN
    0955-2219
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/46018
    Collection
    • Curtin Research Publications
    Abstract

    The effects of Al2O3 addition on the densification, structure and microwave dielectric properties of CaSiO3 ceramics have been investigated. The Al2O3 addition results in the presence of two distinct phases, e.g. Ca2Al2SiO7 and CaAl2Si2O8, which can restrict the growth of CaSiO3 grains by surrounding their boundaries and also improve the bulk density of CaSiO3-Al2O3 ceramics. However, excessive addition (=2wt%) of Al2O3 undermines the microwave dielectric properties of the title ceramics since the derived phases of Ca2Al2SiO7 and CaAl2Si2O8 have poor quality factor. The optimum amount of Al2O3 addition is found to be 1wt%, and the derived CaSiO3-Al2O3 ceramic sintered at 1250°C presents improved microwave dielectric properties of e{open}r=6.66 and Q×f=24,626GHz, which is much better than those of pure CaSiO3 ceramic sintered at 1340°C (Q×f=13,109GHz). © 2011.

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