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High-transparency bismuth layered ferroelectric ceramic and preparation method thereof
The invention discloses high-transparency bismuth layered ferroelectric ceramic and a preparation method thereof. The chemical composition of the bismuth layered ferroelectric ceramic is CaBi2 (1 + x) Nb2O9 + 3x, and x is more than or equal to-0.05 and less than or equal to 0.1. According to the bismuth layered ferroelectric ceramic, a bismuth element is adopted to carry out self-doping modification on traditional bismuth layered ceramic with high Curie temperature, so that the visible light transmittance of the bismuth layered ceramic is remarkably improved. Besides, the preparation method adopts a strategy of combining solid-phase powder pre-sintering and spark plasma sintering, so that flaky grains which are not easy to densify can be accumulated more tightly, the porosity of the ceramic is reduced, and the transmittance is remarkably improved; the density, ferroelectricity and field-induced strain performance of the obtained bismuth layered ferroelectric ceramic are superior to those of a sample prepared by sintering through a traditional solid-phase method.
本发明公开一种高透明度的铋层状铁电陶瓷及其制备方法。所述铋层状铁电陶瓷的化学组成为CaBi2(1+x)Nb2O9+3x，其中，‑0.05≤x≤0.1。所述铋层状铁电陶瓷采用铋元素对传统高居里温度的铋层状陶瓷进行自掺杂改性，使铋层状陶瓷的可见光透过率得到显著提升。另外，所述制备方法采用固相法预烧粉体与放电等离子烧结相结合的策略，能够使不易致密化的片状晶粒堆积更加紧密，陶瓷气孔率降低，透过率显著提高，所得铋层状铁电陶瓷的致密度、铁电性、场致应变性能均优于传统固相法烧结制备的样品。
High-transparency bismuth layered ferroelectric ceramic and preparation method thereof
The invention discloses high-transparency bismuth layered ferroelectric ceramic and a preparation method thereof. The chemical composition of the bismuth layered ferroelectric ceramic is CaBi2 (1 + x) Nb2O9 + 3x, and x is more than or equal to-0.05 and less than or equal to 0.1. According to the bismuth layered ferroelectric ceramic, a bismuth element is adopted to carry out self-doping modification on traditional bismuth layered ceramic with high Curie temperature, so that the visible light transmittance of the bismuth layered ceramic is remarkably improved. Besides, the preparation method adopts a strategy of combining solid-phase powder pre-sintering and spark plasma sintering, so that flaky grains which are not easy to densify can be accumulated more tightly, the porosity of the ceramic is reduced, and the transmittance is remarkably improved; the density, ferroelectricity and field-induced strain performance of the obtained bismuth layered ferroelectric ceramic are superior to those of a sample prepared by sintering through a traditional solid-phase method.
本发明公开一种高透明度的铋层状铁电陶瓷及其制备方法。所述铋层状铁电陶瓷的化学组成为CaBi2(1+x)Nb2O9+3x，其中，‑0.05≤x≤0.1。所述铋层状铁电陶瓷采用铋元素对传统高居里温度的铋层状陶瓷进行自掺杂改性，使铋层状陶瓷的可见光透过率得到显著提升。另外，所述制备方法采用固相法预烧粉体与放电等离子烧结相结合的策略，能够使不易致密化的片状晶粒堆积更加紧密，陶瓷气孔率降低，透过率显著提高，所得铋层状铁电陶瓷的致密度、铁电性、场致应变性能均优于传统固相法烧结制备的样品。
High-transparency bismuth layered ferroelectric ceramic and preparation method thereof
一种高透明度的铋层状铁电陶瓷及其制备方法
CAO WENFANG (Autor:in) / HE XIANG (Autor:in) / YI ZHIGUO (Autor:in)
03.02.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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