期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 15, 期 -, 页码 5833-5840出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2021.11.030
关键词
NaNbO3; Polyacrylamide gel; Formation mechanism; Highly sintering-active; Low-temperature sintering technical
资金
- National Natural Science Foundation of China [51762024, 52062018, 52162003, 51862016]
- Natural Science Foundation of Jiangxi Province [20192BAB206008, 20192BAB212002]
- Jiangxi Province [2020ZDI03004]
- Foundation of the Department of Education of Guizhou province [KY [2018]030]
NaNbO3 powder was synthesized using the polyacrylamide gel method, and after calcination at 565 degrees C, it exhibited dense ceramic sintering activity at a lower temperature. The morphology and composition of NaNbO3 powder changed with increasing calcination temperature, resulting in the formation of highly sinterable cubic NaNbO3 ceramic.
NaNbO3 powder was synthesized via the polyacrylamide gel method, growth behaviors and associated morphology were discussed. The calcined NaNbO3 powder at 565 degrees C possess cubic and long columnar morphology which are NaNbO3 and Na/Nb/F or Na/Nb/F/O compounds, respectively. According to XRD and SEM, as calcined temperature raised, the amount of F in Na/Nb/F or Na/Nb/F/O compounds gradually reduced, long columnar compounds resolved into cubic NaNbO3. These changes made the NaNbO3 powder which calcined at 565 degrees C obtain highly sintering activity, dense NaNbO3 ceramic can sintering at 1200 degrees C. NaNbO3 ceramic densification was caused by the large ionic radius O2- replaced the small ionic radius F- during the calcining process. Compared with the solid-state re -action method, the sintering temperature of NaNbO3 ceramic was be reduced in this work, which contribute for low-temperature sintering technical of NaNbO3 ceramics. (c) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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