%0 Journal Article
%T Piezoelectric Properties of (Na0.5K0.5-xLix)NbO3 Ceramics<br>Piezoelectric Properties of （Na0.5K0.5-xLix）NbO3 Ceramics
%A Peng QI
%A Jinfeng WANG
%A Baoquan MING
%A Juan DU
%A Xinghua LIANG
%A Limei ZHENG
%A <br>Peng
%A QI
%A Jinfeng
%A WANG
%A Baoquan
%A MING
%A Juan
%A DU
%A Xinghua
%A LIANG
%A Limei
%A ZHENG
%J 材料科学技术学报
%D 2007
%I 
%X Lead-free piezoelectric ceramics (Na0.5K0.5-xLix)NbO3 (x=0.057-0.066) were synthesized by an ordinary sintering technique. Substituting Li for K can lead to structural distortion, which improves the Curie temperature(TC) greatly. By adding appropriate LiNbO3 content, piezoelectric constant d33 values reach 202-212 pC/N.Electromechanical coefficients of the planar mode reach 44.4%-46.8%. The dielectric loss is below 2.6%,which is much lower than reported (about 50%). The TC of (Na0.5K0.5-xLix)NbO3 (x=0.057-0.066) is in the range of 490-510℃, at least 70℃ higher than that of pure (Na0.5K0.5)NbO3 ceramics. The results show that (Na0.5K0.5-xLix)NbO3 ceramic is a kind of good lead-free high-temperature piezoelectric material.
%K Lead-free
%K Piezoelectric
%K Dielectric
%K Morphotropic phase boundary<br>压电材料
%K 电介质
%K Na0.5K0.5-xLix
%K NbO3陶瓷材料
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=F1839B40C8AE1F67140C424CAB3EE272&yid=A732AF04DDA03BB3&vid=EA389574707BDED3&iid=B31275AF3241DB2D&sid=07034C6B9EA4A53C&eid=BC60A9A1D91963F5&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=21