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.
Newly developed sintering aid Na5.6Cu1.2Sb10O29 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 den- sity and the piezoelectric activity, but also on reducing the dielectric loss of NKLNS. The NKLNS doped with 0.4 tool% NCS has a piezoelectric constant d33 as high as 261pC/N and an electromechanical coupiing factor k33 above 60%. These results show that NCS-doped NKLNS is a promising and practicable candidate for lead-bismuth-free piezoceremics.
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
关键词
无铅无铋压电陶瓷
相变
铌酸盐
钽酸盐
lead-bismuth-free piezoceramics, niobate, tantalate, electromechanical coupling factor, phase transition
