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The Influence of La2O3 Additive on the Dielectric Properties of Ba0.6Sr0.4TiO3-MgO Bulk Ceramics

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Abstract:

The influence of La2O3-doping on the dielec- tric properties of Ba0.6Sr0.4TiO3-6wt%MgO was studied. With the increase of La2O3-doping content, the space between adjacent parallel crystal planes of BST-MgO composite first became larger, then smaller. Proper quantity of La2O3 could ensure moderate dielectric constant and reduce the dielectric loss of BST-MgO composite at high frequency, but excess quantity of La2O3 would lower dielectric constant. When the La2O3-doping content was 0.2wt%, the dielectric constant and loss of BST-MgO composite were equal to 93.2 and 0.005 (1MHz), respectively. And the dielectric constant tunability could be obtained to 12.1% (21kV/cm).

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Periodical:

Key Engineering Materials (Volumes 336-338)

Pages:

249-251

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.249

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Online since:

April 2007

Authors:

Chun Lai Xu, He Ping Zhou

Keywords:

Barium Strontium Titanate, Dielectric Property, Lanthanum Oxide

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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