Lithium oxide-trivalent oxide co-doped ABO3 structure-based high-temperature stability piezoelectric ceramic material and preparation method thereof
A piezoelectric ceramic and oxide technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of large experimental workload, low temperature stability, inconvenience, etc. The effect of low cost, simple preparation process and excellent performance
Inactive Publication Date: 2016-09-21
HARBIN INST OF TECH
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Problems solved by technology
[0005] The large piezoelectric effect obtained through PPT has the disadvantage of low temperature stability; although the piezoelectric coefficient near MPB is large, the process of searching for MPB is very long, because MPB only exists in a relatively narrow composition range, Therefore, the experimental workload in the early stage is very large; although the special sintering process can obtain a large piezoelectric coefficient, the complexity of the sintering process brings inconvenience to industrial mass production
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specific Embodiment approach 1
[0061] Specific implementation mode 1: A lithium oxide-trivalent oxide co-doped ABO in this implementation mode 3 type perovskite structure piezoelectric ceramic material, its chemical composition is A 1-2x Li x m x TiO 3 ; Wherein, A is a divalent metal cation; M is a trivalent metal cation; wherein, x=0.1~10mol%.
specific Embodiment approach 2
[0062] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the divalent metal cation is Ba 2+ , Pb 2+ 、Sr 2+ , Ca 2+ or Zn 2+ ; The trivalent metal cations are Al, Ga, In, TI or La series elements. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0063] Embodiment 3: This embodiment is different from Embodiment 1 in that: x=1-8mol%. Others are the same as in the first embodiment.
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Abstract
The invention provides a lithium oxide-trivalent oxide co-doped ABO3 structure-based high-temperature stability piezoelectric ceramic material and a preparation method thereof, and relates to a piezoelectric ceramic material and a preparation method thereof. The chemical formula of the piezoelectric ceramic material is A1 2xLixMxBO3, wherein x= 0.1 to 10 mol%; or the chemical formula of the piezoelectric ceramic material is A1 2xLixMxTiyZr1 yO3, wherein x= 0.1 to 10 mol% and y=0 to 100 mol%. In the prepared lithium oxide-aluminium oxide co-doped barium titanate ceramics (LixAlx Ba1 2xTiO3), d33=301 pC / N when x=1 mol%, and the depolarization temperature of the prepared lithium oxide-aluminium oxide co-doped barium titanate ceramics (LixAlx Ba1 2xTiO3) approaches the Curie temperature. Meanwhile, in the prepared lithium oxide-lead oxide co-doped lead zirconate-titanate ceramics (LixAlxPb1 2xZr0.52Ti0.48O3), d33=320 pC / N when x=1 mol%, and the depolarization temperature of the prepared lithium oxide-lead oxide co-doped lead zirconate-titanate ceramics approaches the Curie temperature.
Description
technical field [0001] The invention relates to a piezoelectric ceramic material and a preparation method thereof. Background technique [0002] Piezoelectric ceramic materials occupy a considerable proportion in the field of electronic functional materials and have received extensive attention. The earliest piezoelectric materials were mainly piezoelectric single crystal materials, but the preparation cost of single crystal materials was high, and then polycrystalline ceramic materials with simple preparation processes were discovered, and piezoelectric ceramic materials were discovered based on the discovery of BaTiO 3 (BT) ceramics started, and once BT ceramics were discovered, they were used in practice. Researchers continue to study ABOs similar to BT structures. 3 Modified perovskite structure ceramics to obtain some materials with more excellent properties, and are widely used in various piezoelectric devices such as filters and piezoelectric transducers. [0003] t...
Claims
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IPC IPC(8): C04B35/468C04B35/622C04B41/88C04B35/491H01L41/187H10N30/853
CPCC04B35/4682C04B35/491C04B35/622C04B41/5116C04B41/88C04B2235/9607C04B2235/3217C04B2235/3203H10N30/8542C04B41/4535
Inventor 费维栋冯宇李伟力徐丹
Owner HARBIN INST OF TECH