Lead-bismuth-free piezoceramics (Na_(0.5)K_(0.44)Li_(0.06))Nb_(0.95)Sb_(0.05)O_3-Na_(5.6)Cu_(1.2)Sb_(10)O_(29)

查看全文 作　　者：ZHENG LiMei WANG JinFeng ZANG GuoZhong ZHAO MingLei QI Peng DU Juan SU WenBin MING [1]BaoQuan 机构地区：[1]School of Physics and Microelectronics, State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100, China 出　　处：《Chinese Science Bulletin》索引2007年第52卷第4期,共4页 基　　金：Supported by the National Natural Science Foundation of China (Grant No. 50572056);the Natural Science Foundation of Shandong Province, China (No. Z2003F04);the Basic Science Talent Training Foundation of China 摘　　要：Newly developed sintering aid Na5.6Cu1.2Sb10O29 (NCS) and lead-bismuth-free piezoceramics (Na0.5K0.44Li0.06) Nb0.95Sb0.05O3 (NKLNS) were prepared by the conventional solid state reaction. The effects of sintering aid NCS on the electrical properties of NKLNS were investigated. It was found that the addition of a proper amount of sintering aid NCS to NKLNS is effective not only on improving the density and the piezoelectric activity, but also on reducing the dielectric loss of NKLNS. The NKLNS doped with 0.4 mol% NCS has a piezoelectric constant d33 as high as 261pC/N and an electromechanical coupling factor k33 above 60%. These results show that NCS-doped NKLNS is a promising and practicable candidate for lead-bismuth-free piezoceramics. 关 键 词：无铅无铋压电陶瓷 相变 铌酸盐 钽酸盐