摘要
(1鈭?em>x)Bi0.51(Na0.82K0.18)0.50TiO3-xBa0.85Ca0.15Ti0.90Zr0.10O3 [(1鈭?em>x)BNKT-xBCTZ] ceramics were prepared by the conventional solid-state method, and the effect of BCTZ content on their microstructure and electrical properties was investigated. A stable solid solution with a pure perovskite phase is formed between BNKT and BCTZ, and these ceramics have a coexistence of rhombohedral and tetragonal phases in the range of 0 鈮?#xA0;x < 0.15. Their Tm and Td values are strongly independent on the BCTZ content. Moreover, the sintering temperature strongly affects the ferroelectric and piezoelectric properties of these ceramics with x = 0.02. These ceramics with x = 0.02 exhibit an optimum electrical behavior of d33 鈭?#xA0;205, kp 鈭?#xA0;0.25, Pr 鈭?#xA0;31.8 渭C/cm2, and Ec 鈭?#xA0;19.1 kV/cm together with a high Td value of 鈭?1 掳C when sintered at 1180 掳C and poled at an optimum condition. As a result, the (1鈭?em>x)BNKT-xBCTZ ceramic is a promising candidate material for lead-free piezoelectric ceramics.