%0 Journal Article
%T Preparation and Properties of La_2O_3 Doped BST/Mg_2TiO_4 Microwave Composite Ceramics<br>La_2O_3掺杂BST/Mg_2TiO_4微波复合陶瓷的制备和性能
%A WANG Cheng HU Zuoqi WU Shuangjie WANG Qing ZHAO Xu
%A <br>王成
%A 胡作启
%A 伍双杰
%A 王庆
%A 赵旭
%J 材料研究学报
%D 2011
%I 
%X La2O3 doped Ba0.55Sr0.45TiO3/Mg2TiO4 microwave composite ceramics were prepared by traditional solid-state reaction, and the influence of La2O3 doping on microstructure, dielectric properties and tuning was investigated. The results show that La3+ enters BST lattices when the mass fraction of La2O3 reach 1.2%, and La3+ doped sample can prevent the change of the chemical valence of Ti in BST/Mg2TiO4 composite system from +4 to +3. Mg2TiO4 and La2O3 doping can reduce the dielectric constant and microwave loss separately. The 1.2% La2O3 doped sample has the best properties: dielectric constant 52; tanδ 0.0011 (10 GHz), and the tunability 13.4% (3 kV/mm).
%K inorganic non-metallic materials
%K La2O3 doped
%K solid-state reaction
%K BST compositeinorganic non-metallic materials
%K La2O3 doped
%K solid-state reaction
%K BST composite ceramics
%K microwave loss
%K tunabilityceramics
%K microwave loss
%K tunability<br>无机非金属材料
%K La2O3掺杂
%K 固相烧结法
%K BST复合陶瓷
%K 微波损耗
%K 调谐率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=3924FE186C90DEE492BFCCAB112B39FE&yid=9377ED8094509821&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=91C9056D8E8856E0&eid=4BB057F167CF3A60&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=0