%0 Journal Article
%T Effect of A-site Substitution by Nd~3+ on the Microwave Dielectric Properties of (Pb0.5Ca0.5)(Fe0.5Nb0.5)O3 Ceramics<br>Nd3+A位置换对(Pb0.5Ca0.5)(Fe0.5Nb0.5)O3陶瓷微波介电性能的影响
%A YANG Qiu-Hong
%A KIM Eung-Soo
%A XU Jun
%A <br>杨秋红
%A 金应秀
%A 徐军
%J 无机材料学报
%D 2003
%I Science Press
%X Microwave dielectric properties of A-site substitution by Nd3+ in(Pb0.5Ca0.5)(Fe0.5 Nb0.5)O3 system were investigated. Microwave dielectric properties of (Pb0.5Ca0.5)1-xNdx](Fe0.5 Nb0.5)O3 (PCNFN) were improved because the solid solution of small amount of surplus Nd3+ with (Pb,Ca)2+ could eliminate oxygen vacancies. A single perovskite phase was formed when x=0.02. Surplus Nd3+ resulted in the formation of secondary phase (pyrochlore), which can deteriorate to the microwave dielectric properties of PCNFN ceramics. The decreasing of dielectric properties with x content was mainly caused by the formation of pyrochlore. Dielectric constant was above 100 and quality factor Qf values were 5385-5797GHz as x = 0.02 -0.05. Temperature coefficient of resonant frequency (TCF) was changed from positive to negative with the increase of x content.
%K (Pb
%K Ca
%K Nd)(Fe
%K Nb)03
%K microwave dielectric ceramics
%K perovskite
%K pyrochlore
%K charge unbalance substitution<br>（Pb，Ca，Nd）（Fe，Nb）O3
%K 微波介质陶瓷
%K 钙钛矿
%K 焦绿石
%K 电荷非平衡置换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=EEF836648298D85E&yid=D43C4A19B2EE3C0A&vid=13553B2D12F347E8&iid=94C357A881DFC066&sid=14B92F3C984CB5EA&eid=0C7160AA184DEC96&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=0&reference_num=10