（Na0.52K0.44Li0.04）Nb0.9-x Sbx Ta0.1O3 lead-free piezoelectric ceramics are prepared by a solid-state reaction method. With increasing Sb content, the transition temperature from orthorhombic to tetragonal polymorph...（Na0.52K0.44Li0.04）Nb0.9-x Sbx Ta0.1O3 lead-free piezoelectric ceramics are prepared by a solid-state reaction method. With increasing Sb content, the transition temperature from orthorhombic to tetragonal polymorphic phase decreased. A composition （Na0.52K0.44Li0.04）Nb0.863Sb0.037Ta0.1O3 is found to possess excellent piezo- electric and electromechanical performances （d33 = 306pC/N, kp =48%, and kt=50%）, and high Curie temperature （Tc = 320 ℃）. These results indicate that （Na0.52K0.44Li0.04）Nb0.863Sb0.037 Ta0.1O3 is a promising lead-free piezoceramics replacement for lead zirconate titanate.展开更多
In this work,crystal growth and characterization of PIN–PMN–PT(29–59%PIN and 28–35%PT)were conducted to understand how PIN ratio in the PIN–PMN–PT system impacts its phase stability during crystallization.High-q...In this work,crystal growth and characterization of PIN–PMN–PT(29–59%PIN and 28–35%PT)were conducted to understand how PIN ratio in the PIN–PMN–PT system impacts its phase stability during crystallization.High-quality PIN–PMN–PT crystals with 36%PIN were obtained using the self-seeded Bridgman process,even though the cubic phase In_(2)O_(3) formed at the very beginning of solidification.The melt became more unstable when the PIN ratio in the PIN–PMN–PT system increased to 49%and above,which affected the composition and quality of the as-grown crystals significantly.By increasing the PIN to 36%in PIN–PMN–PT crystal,the rhombohedral-to-tetragonal phase transition temperatures and the coercive field reached 115–135℃ and 4.55.6 kV/cm,respectively,that greatly expanded the operation domains compared to PMN–PT crystals.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 50572056, and Research Fund for the Doctoral Programme of Higher Education of China under Grant No 20070422059.
文摘（Na0.52K0.44Li0.04）Nb0.9-x Sbx Ta0.1O3 lead-free piezoelectric ceramics are prepared by a solid-state reaction method. With increasing Sb content, the transition temperature from orthorhombic to tetragonal polymorphic phase decreased. A composition （Na0.52K0.44Li0.04）Nb0.863Sb0.037Ta0.1O3 is found to possess excellent piezo- electric and electromechanical performances （d33 = 306pC/N, kp =48%, and kt=50%）, and high Curie temperature （Tc = 320 ℃）. These results indicate that （Na0.52K0.44Li0.04）Nb0.863Sb0.037 Ta0.1O3 is a promising lead-free piezoceramics replacement for lead zirconate titanate.
文摘In this work,crystal growth and characterization of PIN–PMN–PT(29–59%PIN and 28–35%PT)were conducted to understand how PIN ratio in the PIN–PMN–PT system impacts its phase stability during crystallization.High-quality PIN–PMN–PT crystals with 36%PIN were obtained using the self-seeded Bridgman process,even though the cubic phase In_(2)O_(3) formed at the very beginning of solidification.The melt became more unstable when the PIN ratio in the PIN–PMN–PT system increased to 49%and above,which affected the composition and quality of the as-grown crystals significantly.By increasing the PIN to 36%in PIN–PMN–PT crystal,the rhombohedral-to-tetragonal phase transition temperatures and the coercive field reached 115–135℃ and 4.55.6 kV/cm,respectively,that greatly expanded the operation domains compared to PMN–PT crystals.
