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Sinterability and Microwave Dielectric Properties of Li2CO3-V2O5 Added Mg4Nb2O9-CaTiO3 Composite Ceramics

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Abstract:

The effects of Li2CO3-V2O5 (LV) co-doped on the sinterability, phase compositions and microwave dielectric properties of Mg4Nb2O9-CaTiO3 composite ceramics have been investigated. The phase compositions and microstructure were analyzed using X-ray diffraction, energy dispersive X-ray analysis and scanning electron microscopy techniques. The densification sintering temperature is lowed from 1275oC to 1200oC with an amount LV addition. For the specimen with 1.5 wt% LV addition sintered at 1200oC for 5 h exhibited dielectric properties: εr=23, Q·f=24 000 GHz (at 7.7GHz ), τf =1.0 ppm/oC. These properties were correlated with the formation of non-stoichiometric compound Mg4(Nb1-xTix)2O9-δ.

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Periodical:

Materials Science Forum (Volumes 663-665)

Pages:

1196-1199

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.663-665.1196

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Online since:

November 2010

Authors:

Cui Jin Pei, Guo Guang Yao, Hong Ma, Xiu Lao Tian

Keywords:

Composite Ceramics, Dielectric Property, Sintering Aid

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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