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Silver niobate energy storage ceramic with efficient grain size effect and preparation method of silver niobate energy storage ceramic
The invention discloses silver niobate energy storage ceramic with an efficient grain size effect and a preparation method of the silver niobate energy storage ceramic. The preparation method comprises the following steps: uniformly mixing Ag2O and Nb2O5, and carrying out aerobic presintering to obtain presintered powder; and placing the pre-sintered powder in a mold for SPS sintering to obtain compact ceramic, and carrying out decarburization treatment and electrode treatment to obtain the ceramic. The molar ratio of the Ag2O to the Nb2O5 is 1: (0.8-1.2); the temperature of the SPS sintering process is 700 to 1050 DEG C, the pressure of the SPS sintering process is 40 to 120 MPa, and the time of the SPS sintering process is 3 to 7 minutes. According to the method, pressure can be applied in real time while sintering is conducted through the SPS technology, the density higher than that of a traditional solid phase method is obtained, the sintering temperature is greatly reduced, accordingly, a ceramic body compact in structure and fine in grain size is obtained, optimization and improvement of the energy storage density of the AgNbO3 ceramic are successfully achieved, and it is tested that the energy storage density of the AgNbO3 ceramic is higher than that of a traditional solid phase method. Compared with silver niobate energy storage ceramic without a grain size effect, the energy storage performance of the silver niobate energy storage ceramic can be improved by 92% at most.
本发明公开了一种高效晶粒尺寸效应的铌酸银储能陶瓷及其制备方法。该制备方法为：将Ag2O和Nb2O5混合均匀后进行有氧预烧，得预烧粉；将预烧粉置于模具中进行SPS烧结，得致密陶瓷，再经过脱碳处理和被电极，即得；所述Ag2O和Nb2O5的摩尔比为1：0.8～1.2；所述SPS烧结过程的温度为700～1050℃，压力为40～120MPa，时间为3～7min。该方法利用SPS技术在烧结同时还可以实时施加压力，获得比传统固相法更高的致密度，并且还大幅度降低了烧结温度，从而获得结构致密且晶粒细小的陶瓷体，成功实现了AgNbO3陶瓷储能密度的优化提升，经测试，相较于无晶粒尺寸效应的铌酸银储能陶瓷，其储能性能提升最高可达92％。
Silver niobate energy storage ceramic with efficient grain size effect and preparation method of silver niobate energy storage ceramic
The invention discloses silver niobate energy storage ceramic with an efficient grain size effect and a preparation method of the silver niobate energy storage ceramic. The preparation method comprises the following steps: uniformly mixing Ag2O and Nb2O5, and carrying out aerobic presintering to obtain presintered powder; and placing the pre-sintered powder in a mold for SPS sintering to obtain compact ceramic, and carrying out decarburization treatment and electrode treatment to obtain the ceramic. The molar ratio of the Ag2O to the Nb2O5 is 1: (0.8-1.2); the temperature of the SPS sintering process is 700 to 1050 DEG C, the pressure of the SPS sintering process is 40 to 120 MPa, and the time of the SPS sintering process is 3 to 7 minutes. According to the method, pressure can be applied in real time while sintering is conducted through the SPS technology, the density higher than that of a traditional solid phase method is obtained, the sintering temperature is greatly reduced, accordingly, a ceramic body compact in structure and fine in grain size is obtained, optimization and improvement of the energy storage density of the AgNbO3 ceramic are successfully achieved, and it is tested that the energy storage density of the AgNbO3 ceramic is higher than that of a traditional solid phase method. Compared with silver niobate energy storage ceramic without a grain size effect, the energy storage performance of the silver niobate energy storage ceramic can be improved by 92% at most.
本发明公开了一种高效晶粒尺寸效应的铌酸银储能陶瓷及其制备方法。该制备方法为：将Ag2O和Nb2O5混合均匀后进行有氧预烧，得预烧粉；将预烧粉置于模具中进行SPS烧结，得致密陶瓷，再经过脱碳处理和被电极，即得；所述Ag2O和Nb2O5的摩尔比为1：0.8～1.2；所述SPS烧结过程的温度为700～1050℃，压力为40～120MPa，时间为3～7min。该方法利用SPS技术在烧结同时还可以实时施加压力，获得比传统固相法更高的致密度，并且还大幅度降低了烧结温度，从而获得结构致密且晶粒细小的陶瓷体，成功实现了AgNbO3陶瓷储能密度的优化提升，经测试，相较于无晶粒尺寸效应的铌酸银储能陶瓷，其储能性能提升最高可达92％。
Silver niobate energy storage ceramic with efficient grain size effect and preparation method of silver niobate energy storage ceramic
一种高效晶粒尺寸效应的铌酸银储能陶瓷及其制备方法
YAN ZHONGNA (author) / CHEN YING (author) / HE JIA (author) / PENG HAOJIE (author) / CHEN HAIYAN (author) / LI CHUANCHANG (author)
2024-11-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2020
| European Patent Office | 2021
| European Patent Office | 2023