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High-performance lead-free texture KNN-based piezoelectric ceramic and preparation method thereof
The invention provides a high-performance lead-free texture KNN-based piezoelectric ceramic and a preparation method thereof, and belongs to the technical field of electronic functional ceramics. The chemical formula of the lead-free texture KNN-based piezoelectric ceramic is (1-x-w) K < 0.5 > Na < 0.5 > Nb < 1-y > SbyO < 3-x > Bi < 0.5 > Na < 0.5 > Zr < 3-w > Bi < FeO < 3-z > NaNbO < 3 >, NaNbO < 3 > is a seed crystal template, x is equal to 0.01 to 0.10, y is equal to 0.01 to 0.10, w is equal to 0 to 0.05 mol, and z is equal to 0.01 to 0.10 wt. Wherein the NaNbO3 seed crystal provides a ceramic grain orientation growth template, so that ceramic grains are oriented along the lt on the flaky template seed crystal; 001gt, 001gt; crystal face orientation growth is carried out, and then the KNN-based textured piezoelectric ceramic is obtained. Bi0. 5Na0. 5ZrO3, BiFeO3, Sb < 5 + > ions and the like are mainly used for adjusting phase transition temperatures of orthorhombic crystals and tetragonal crystals, and phase transition temperatures of (O-T), rhombohedral crystals and orthorhombic crystals (R-O), so that the phase transition temperatures appear near the room temperature. After the ceramic is textured, the piezoelectric property of the KNN-based piezoelectric material can be greatly improved.
本发明提供一种高性能无铅织构KNN基压电陶瓷及其制备方法，属于电子功能陶瓷技术领域。所述无铅织构KNN基压电陶瓷的化学式为(1‑x‑w)K0.5Na0.5Nb1‑ySbyO3‑xBi0.5Na0.5ZrO3‑wBiFeO3‑zNaNbO3，其中NaNbO3为晶种模板，x＝0.01～0.10，y＝0.01～0.10和w＝0～0.05mol，及z＝0.01～0.10wt。其中NaNbO3晶种提供陶瓷晶粒取向生长模板，使得陶瓷晶粒沿片状模板晶种上的<001>晶面取向生长，进而获得KNN基织构压电陶瓷。Bi0.5Na0.5ZrO3、BiFeO3和Sb5+离子等主要用来调节正交晶与四方晶，以及(O‑T)及菱方晶与正交晶(R‑O)的相转变温度，使其出现在室温附近。通过对该陶瓷进行织构化后，有利于大幅度提升KNN基压电材料的压电性能。
High-performance lead-free texture KNN-based piezoelectric ceramic and preparation method thereof
The invention provides a high-performance lead-free texture KNN-based piezoelectric ceramic and a preparation method thereof, and belongs to the technical field of electronic functional ceramics. The chemical formula of the lead-free texture KNN-based piezoelectric ceramic is (1-x-w) K < 0.5 > Na < 0.5 > Nb < 1-y > SbyO < 3-x > Bi < 0.5 > Na < 0.5 > Zr < 3-w > Bi < FeO < 3-z > NaNbO < 3 >, NaNbO < 3 > is a seed crystal template, x is equal to 0.01 to 0.10, y is equal to 0.01 to 0.10, w is equal to 0 to 0.05 mol, and z is equal to 0.01 to 0.10 wt. Wherein the NaNbO3 seed crystal provides a ceramic grain orientation growth template, so that ceramic grains are oriented along the lt on the flaky template seed crystal; 001gt, 001gt; crystal face orientation growth is carried out, and then the KNN-based textured piezoelectric ceramic is obtained. Bi0. 5Na0. 5ZrO3, BiFeO3, Sb < 5 + > ions and the like are mainly used for adjusting phase transition temperatures of orthorhombic crystals and tetragonal crystals, and phase transition temperatures of (O-T), rhombohedral crystals and orthorhombic crystals (R-O), so that the phase transition temperatures appear near the room temperature. After the ceramic is textured, the piezoelectric property of the KNN-based piezoelectric material can be greatly improved.
本发明提供一种高性能无铅织构KNN基压电陶瓷及其制备方法，属于电子功能陶瓷技术领域。所述无铅织构KNN基压电陶瓷的化学式为(1‑x‑w)K0.5Na0.5Nb1‑ySbyO3‑xBi0.5Na0.5ZrO3‑wBiFeO3‑zNaNbO3，其中NaNbO3为晶种模板，x＝0.01～0.10，y＝0.01～0.10和w＝0～0.05mol，及z＝0.01～0.10wt。其中NaNbO3晶种提供陶瓷晶粒取向生长模板，使得陶瓷晶粒沿片状模板晶种上的<001>晶面取向生长，进而获得KNN基织构压电陶瓷。Bi0.5Na0.5ZrO3、BiFeO3和Sb5+离子等主要用来调节正交晶与四方晶，以及(O‑T)及菱方晶与正交晶(R‑O)的相转变温度，使其出现在室温附近。通过对该陶瓷进行织构化后，有利于大幅度提升KNN基压电材料的压电性能。
High-performance lead-free texture KNN-based piezoelectric ceramic and preparation method thereof
一种高性能无铅织构KNN基压电陶瓷及其制备方法
ZHU LIFENG (Autor:in) / LIU DONG (Autor:in) / WANG QI (Autor:in)
11.06.2024
Patent
Elektronische Ressource
Chinesisch
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