%0 Journal Article
%T Improvement in Dielectric Tunability of Ba0.6Sr0.4TiO4-Mg2TiO4 Composite Ceramics via Heterogeneous Nucleation Processing<br>
%A WANG Zhuo
%A LI Yong-Xiang
%A <br>
%J 中国物理快报
%D 2009
%I 
%X Dielectric tunable composite ceramics Ba0.6Sr0.4TiO3-Mg2TiO4 (BST-MT) are prepared with a heterogeneous nucleation sol-gel approach. The Mg2TiO4 powders are synthesized by the conventional solid-state reaction method. The micro-sized MT powders with dispersant Ciba-4010 are introduced into Ba-Sr-Ti sol to obtain uniform and homogeneous mixture compounds with nano-sized BST particles synthesized via heterogeneous nucleation (HN) in the sol-gel process. Thus, the microstructural and dielectric properties can be tailored. The dielectric constants of BST-MT composite ceramics can be adjusted in a large range from 294 to 1790, and the dielectric tunability can be adjusted from 29.4% to 37.0% with different MT contents from 60wt% to 20wt%. Compared to the samples prepared by the conventional solid-state (SS) process, the BST-MT composite ceramics by the heterogeneous nucleation sol-gel process exhibit a more uniform microstructure, and improve dielectric properties.
%K 77
%K 22
%K -d
%K 77
%K 22
%K Ch
%K 77
%K 84
%K Dy<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=D179C8FE91F16EF08D8DBA7620F33CE8&yid=DE12191FBD62783C&vid=96C778EE049EE47D&iid=708DD6B15D2464E8&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0