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The invention relates to doped barium titanate lead-free piezoelectric ceramic with high electrostrictive strain and low hysteresis and a preparation method of the doped barium titanate lead-free piezoelectric ceramic, and belongs to the technical field of inorganic non-metallic materials. The barium titanate-doped lead-free piezoelectric ceramic with high electrostrictive strain and low hysteresis is prepared by adopting a traditional solid-phase reaction method, the chemical formula is BaTi < 1-x > SnxO3, abbreviated as BTSx, x is the mole number of Sn < 4 + >, the range of x is 0.02 < = x < = 0.04, the material is simple in synthesis process, low in cost and low in sintering temperature (Ts = 1250-1290 DEG C), the bilateral electrostrictive strain bipolar Smax is up to 0.50% at the room temperature of 1 Hz, and the piezoelectric ceramic has a good application prospect. The unipolar Smax reaches up to 0.55%, the strain lag hys (hys% = S/Smax, and S is the variation of the unipolar electrostrictive strain at the position of half Emax/2 of the maximum electric field in the alternating electric field intensity increasing or decreasing process) is as low as 2%, compared with BaTiO3 ceramic, the BaTi1-xSnxO3 ceramic prepared through the method has the advantages that the unipolar electrostrictive strain is improved by 58%, the strain lag is reduced by 89%, the Curie temperature TC is larger than or equal to 101 DEG C and smaller than or equal to 125 DEG C, and the Curie temperature TC is larger than or equal to 100 DEG C. The method has great application potential in preparation of piezoelectric actuators and actuators.
本发明涉及一种高电致应变和低滞后的掺杂钛酸钡无铅压电陶瓷及其制备方法，属于无机非金属材料技术领域。本发明采用传统的固相反应法制备得到具有高电致应变和低滞后的掺杂钛酸钡无铅压电陶瓷，化学式为BaTi1‑xSnxO3，简写为BTSx，其中x为Sn4+的摩尔数，x的范围为0.02≤x≤0.04，该材料的合成工艺简单、成本低廉、烧结温度低(Ts＝1250～1290℃)、室温1Hz下双边电致应变bipolar Smax高达0.50％，单边电致应变unipolar Smax高达0.55％，应变滞后hys％(hys％＝△S/Smax，其中△S为交流电场强度增大或减小过程中达到最大电场一半Emax/2处的单边电致应变的变化量)低至2％，相对于BaTiO3陶瓷，该方法制备的BaTi1‑xSnxO3陶瓷的单边电致应变提高了58％，应变滞后降低了89％，居里温度TC(101℃≤TC≤125℃)，其在压电驱动器和致动器的制备中具有很大的应用潜力。
The invention relates to doped barium titanate lead-free piezoelectric ceramic with high electrostrictive strain and low hysteresis and a preparation method of the doped barium titanate lead-free piezoelectric ceramic, and belongs to the technical field of inorganic non-metallic materials. The barium titanate-doped lead-free piezoelectric ceramic with high electrostrictive strain and low hysteresis is prepared by adopting a traditional solid-phase reaction method, the chemical formula is BaTi < 1-x > SnxO3, abbreviated as BTSx, x is the mole number of Sn < 4 + >, the range of x is 0.02 < = x < = 0.04, the material is simple in synthesis process, low in cost and low in sintering temperature (Ts = 1250-1290 DEG C), the bilateral electrostrictive strain bipolar Smax is up to 0.50% at the room temperature of 1 Hz, and the piezoelectric ceramic has a good application prospect. The unipolar Smax reaches up to 0.55%, the strain lag hys (hys% = S/Smax, and S is the variation of the unipolar electrostrictive strain at the position of half Emax/2 of the maximum electric field in the alternating electric field intensity increasing or decreasing process) is as low as 2%, compared with BaTiO3 ceramic, the BaTi1-xSnxO3 ceramic prepared through the method has the advantages that the unipolar electrostrictive strain is improved by 58%, the strain lag is reduced by 89%, the Curie temperature TC is larger than or equal to 101 DEG C and smaller than or equal to 125 DEG C, and the Curie temperature TC is larger than or equal to 100 DEG C. The method has great application potential in preparation of piezoelectric actuators and actuators.
本发明涉及一种高电致应变和低滞后的掺杂钛酸钡无铅压电陶瓷及其制备方法，属于无机非金属材料技术领域。本发明采用传统的固相反应法制备得到具有高电致应变和低滞后的掺杂钛酸钡无铅压电陶瓷，化学式为BaTi1‑xSnxO3，简写为BTSx，其中x为Sn4+的摩尔数，x的范围为0.02≤x≤0.04，该材料的合成工艺简单、成本低廉、烧结温度低(Ts＝1250～1290℃)、室温1Hz下双边电致应变bipolar Smax高达0.50％，单边电致应变unipolar Smax高达0.55％，应变滞后hys％(hys％＝△S/Smax，其中△S为交流电场强度增大或减小过程中达到最大电场一半Emax/2处的单边电致应变的变化量)低至2％，相对于BaTiO3陶瓷，该方法制备的BaTi1‑xSnxO3陶瓷的单边电致应变提高了58％，应变滞后降低了89％，居里温度TC(101℃≤TC≤125℃)，其在压电驱动器和致动器的制备中具有很大的应用潜力。
Doped barium titanate lead-free ceramic with high electrostrictive strain and low hysteresis and preparation method of doped barium titanate lead-free ceramic
一种具有高电致应变和低滞后的掺杂钛酸钡无铅陶瓷及其制备方法
LI CAIXIA (author)
2022-09-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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