Composition, microstructure and electrical properties of K0.5Na0.5NbO3 ceramics fabricated by cold sintering assisted sintering
Composition, microstructure and electrical properties of K0.5Na0.5NbO3 ceramics fabricated by cold sintering assisted sintering
复制标题
冷烧结辅助烧结K0.5Na0.5NbO3陶瓷的成分、显微结构和电性能
DOI：
10.1016/j.jeurceramsoc.2018.11.044
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发表时间：
2019-04
影响因子：
5.7
通讯作者：
Yu Xing
中科院分区：
文献类型：
--
作者：
Ma Jianzhang;Li Hanying;Wang Huajing;Lin Cong;Wu Xiao;Lin Tengfei;Zheng Xinghua;Yu Xing
本文采用冷烧结作为辅助常规烧结的成形方法，即所谓的冷烧结辅助烧结（CSAS）方法。采用CSAS法制备了无铅K0.5Na0.5NbO3压电陶瓷，并研究了不同工艺对KNN陶瓷的烧结行为和电性能的影响。与传统烧结（CS）相比，冷烧结工艺可以在KNN颗粒表面诱导富钾相，显着提高KNN陶瓷的生坯和烧结密度。同时，富钾相在晶粒表面转变为K4Nb6O17第二相，从而抑制钾元素的挥发。其烧结性能和电性能得到了极大的提高，并且可以在较宽的烧结温度范围（1055°C~1145°C）下制造出高性能的KNN压电陶瓷，这证明CSAS有潜力成为生产KNN基陶瓷的优异烧结技术。
In this paper, cold sintering was served as a forming method to assist the conventional sintering, which is so-called cold sintering assisted sintering (CSAS) method. Lead-free K0.5Na0.5NbO3piezoelectric ceramics were prepared by the CSAS method, and the effects of the different procedures on the sintering behaviors and electrical properties of KNN ceramics were studied. Compared with conventional sintering (CS), cold sintering process can induce potassium-rich phase on the KNN particle surface, and remarkably increase both the green and sintering density of KNN ceramics. Meanwhile, the potassium-rich phase would transform to K4Nb6O17second phase on the grain surface, and subsequently suppress the volatilization of potassium element. The sinterability and electrical properties were greatly improved, and KNN piezoelectric ceramics with high performance can be manufactured in a wide sintering temperature range (1055 °C–1145 °C), which proves that CSAS has the potential to be an excellent sintering technique for producing KNN based ceramics.
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影响因子：
3.9
作者：
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通讯作者：
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影响因子：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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