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Sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material and preparation method thereof
The invention provides a sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material and a preparation method, and belongs to the field of dielectric energy-storage ceramic materials, the sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material is characterized in that the chemical composition is (1-x) Bi < 0.5 > Na < 0.5 > TiO < 3-x > AgNbO3, and x is greater than 0.15 and less than or equal to 0.3. The advantages of a ferroelectric Bi0. 5Na0. 5TiO3 and an antiferroelectric AgNbO3 are utilized, Bi0. 5Na0. 5TiO3 with large spontaneous polarization is used as a matrix, other perovskite is added into the matrix, ions with different valence states and radiuses are introduced to A and B sites, a stable and reversible relaxation antiferroelectric phase structure is obtained, and the relaxation antiferroelectric phase structure is prepared. And finally, the sodium bismuth titanate-based lead-free antiferroelectric energy storage ceramic material with high energy storage density and high energy storage efficiency is obtained, so that the sodium bismuth titanate-based lead-free antiferroelectric energy storage ceramic material can meet the actual application requirements in lead-free energy storage capacitors.
本发明提供一种钛酸铋钠基无铅反铁电高储能陶瓷材料及制备方法，属于电介质储能陶瓷材料领域，其特征在于，化学组成为(1‑x)Bi0.5Na0.5TiO3‑xAgNbO3，其中0.15＜x≤0.3。利用铁电体Bi0.5Na0.5TiO3和反铁电体AgNbO3的优势，以有大自发极化的Bi0.5Na0.5TiO3为基体，向其中加入其它钙钛矿组成，在A和B位引入了不同价态和半径的离子，获得稳定且可逆的弛豫反铁电相结构，最终得到同时具有高储能密度和高储能效率的钛酸铋钠基无铅反铁电储能陶瓷材料，使其能够满足无铅储能电容器中的实际应用需求。
Sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material and preparation method thereof
The invention provides a sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material and a preparation method, and belongs to the field of dielectric energy-storage ceramic materials, the sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material is characterized in that the chemical composition is (1-x) Bi < 0.5 > Na < 0.5 > TiO < 3-x > AgNbO3, and x is greater than 0.15 and less than or equal to 0.3. The advantages of a ferroelectric Bi0. 5Na0. 5TiO3 and an antiferroelectric AgNbO3 are utilized, Bi0. 5Na0. 5TiO3 with large spontaneous polarization is used as a matrix, other perovskite is added into the matrix, ions with different valence states and radiuses are introduced to A and B sites, a stable and reversible relaxation antiferroelectric phase structure is obtained, and the relaxation antiferroelectric phase structure is prepared. And finally, the sodium bismuth titanate-based lead-free antiferroelectric energy storage ceramic material with high energy storage density and high energy storage efficiency is obtained, so that the sodium bismuth titanate-based lead-free antiferroelectric energy storage ceramic material can meet the actual application requirements in lead-free energy storage capacitors.
本发明提供一种钛酸铋钠基无铅反铁电高储能陶瓷材料及制备方法，属于电介质储能陶瓷材料领域，其特征在于，化学组成为(1‑x)Bi0.5Na0.5TiO3‑xAgNbO3，其中0.15＜x≤0.3。利用铁电体Bi0.5Na0.5TiO3和反铁电体AgNbO3的优势，以有大自发极化的Bi0.5Na0.5TiO3为基体，向其中加入其它钙钛矿组成，在A和B位引入了不同价态和半径的离子，获得稳定且可逆的弛豫反铁电相结构，最终得到同时具有高储能密度和高储能效率的钛酸铋钠基无铅反铁电储能陶瓷材料，使其能够满足无铅储能电容器中的实际应用需求。
Sodium bismuth titanate-based lead-free antiferroelectric high-energy-storage ceramic material and preparation method thereof
一种钛酸铋钠基无铅反铁电高储能陶瓷材料及制备方法
WU JIE (Autor:in) / QI HE (Autor:in) / CHEN JUN (Autor:in) / LI WENCHAO (Autor:in) / YU HUIFEN (Autor:in)
20.02.2024
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2023
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