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Large-electrostrictive-strain BNT-KNN-BT-based lead-free piezoelectric ceramic and preparation thereof
The invention provides a large electrostrictive strain BNT-KNN-BT based lead-free piezoelectric ceramic and a preparation method thereof. The chemical general formula of the large electrostrictive strain BNT-KNN-BT based lead-free piezoelectric ceramic is (0.95-x) Bi < 0.5 > (Na < 0.84 > K < 0.06 > Li < 0.1 >) < 0.5 > TiO < 3-x > K < 0.48 > Na < 0.52 > NbO < 3-0.05 > BaTiO < 3-y > MO (M = Cu/Mn/Zn). The preparation method comprises the following steps: drying K2CO3, Na2CO3, Nb2O5, Bi2O3, Li2CO3, TiO2, BaCO3 and ZnO or CuO or MnO2, mixing, adding into a fluidized bed type jet mill to obtain mixed powder, and presintering the powder; dispersing the sintered powder in absolute ethyl alcohol or deionized water, putting into a sand mill, and drying after grinding to obtain mixed powder; performing cold press molding on the mixed powder to obtain a ceramic rough blank, and sintering the ceramic rough blank to obtain a ceramic sample; and carrying out polarization treatment on the ceramic sample to obtain the BNT-KNN-BT based leadless piezoelectric ceramic. The BNT-KNN-BT based lead-free piezoelectric ceramic prepared by the preparation method disclosed by the invention has good electrostrictive strain coefficient and temperature stability.
本发明提出一种大电致应变BNT‑KNN‑BT基无铅压电陶瓷及其制备，其化学通式为(0.95‑x)Bi0.5(Na0.84K0.06Li0.1)0.5TiO3‑xK0.48Na0.52NbO3‑0.05BaTiO3‑yMO(M=Cu/Mn/Zn)。制备方法为，将K2CO3、Na2CO3、Nb2O5、Bi2O3、Li2CO3、TiO2、BaCO3，以及ZnO或CuO或MnO2烘干后混合加入流化床式气流磨机，得到混合粉料，并将该粉料进行预烧结；将烧结后的粉料分散在无水乙醇或去离子水中，在放入砂磨机中，磨好后烘干得到混合粉料；将混合粉料冷压成型得到陶瓷粗胚，将陶瓷粗胚烧结得到陶瓷样品；将陶瓷样品极化处理得到BNT‑KNN‑BT基无铅压电陶瓷。本发明制得的BNT‑KNN‑BT基无铅压电陶瓷具有良好的电致应变系数和温度稳定性。
Large-electrostrictive-strain BNT-KNN-BT-based lead-free piezoelectric ceramic and preparation thereof
The invention provides a large electrostrictive strain BNT-KNN-BT based lead-free piezoelectric ceramic and a preparation method thereof. The chemical general formula of the large electrostrictive strain BNT-KNN-BT based lead-free piezoelectric ceramic is (0.95-x) Bi < 0.5 > (Na < 0.84 > K < 0.06 > Li < 0.1 >) < 0.5 > TiO < 3-x > K < 0.48 > Na < 0.52 > NbO < 3-0.05 > BaTiO < 3-y > MO (M = Cu/Mn/Zn). The preparation method comprises the following steps: drying K2CO3, Na2CO3, Nb2O5, Bi2O3, Li2CO3, TiO2, BaCO3 and ZnO or CuO or MnO2, mixing, adding into a fluidized bed type jet mill to obtain mixed powder, and presintering the powder; dispersing the sintered powder in absolute ethyl alcohol or deionized water, putting into a sand mill, and drying after grinding to obtain mixed powder; performing cold press molding on the mixed powder to obtain a ceramic rough blank, and sintering the ceramic rough blank to obtain a ceramic sample; and carrying out polarization treatment on the ceramic sample to obtain the BNT-KNN-BT based leadless piezoelectric ceramic. The BNT-KNN-BT based lead-free piezoelectric ceramic prepared by the preparation method disclosed by the invention has good electrostrictive strain coefficient and temperature stability.
本发明提出一种大电致应变BNT‑KNN‑BT基无铅压电陶瓷及其制备，其化学通式为(0.95‑x)Bi0.5(Na0.84K0.06Li0.1)0.5TiO3‑xK0.48Na0.52NbO3‑0.05BaTiO3‑yMO(M=Cu/Mn/Zn)。制备方法为，将K2CO3、Na2CO3、Nb2O5、Bi2O3、Li2CO3、TiO2、BaCO3，以及ZnO或CuO或MnO2烘干后混合加入流化床式气流磨机，得到混合粉料，并将该粉料进行预烧结；将烧结后的粉料分散在无水乙醇或去离子水中，在放入砂磨机中，磨好后烘干得到混合粉料；将混合粉料冷压成型得到陶瓷粗胚，将陶瓷粗胚烧结得到陶瓷样品；将陶瓷样品极化处理得到BNT‑KNN‑BT基无铅压电陶瓷。本发明制得的BNT‑KNN‑BT基无铅压电陶瓷具有良好的电致应变系数和温度稳定性。
Large-electrostrictive-strain BNT-KNN-BT-based lead-free piezoelectric ceramic and preparation thereof
一种大电致应变BNT-KNN-BT基无铅压电陶瓷及其制备
GONG WEN (Autor:in) / WU CHAOFENG (Autor:in) / ZHU JIAJING (Autor:in)
02.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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