High sintering activity NaNbO3 powder synthesis via the polyacrylamide gel method and fabrication of a NaNbO3 ceramic at lower temperature
| Autor: | Renfen Zeng, Fen Ye, Chao Chen, Cheng Hao, X. P. Jiang, Xiaokun Huang, Xin Nie |
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| Rok vydání: | 2021 |
| Předmět: |
Polyacrylamide gel
Mining engineering. Metallurgy Materials science Fabrication TN1-997 Metals and Alloys Sintering Low-temperature sintering technical Lower temperature Surfaces Coatings and Films Biomaterials Highly sintering-active Chemical engineering visual_art Formation mechanism Ceramics and Composites visual_art.visual_art_medium NaNbO3 Ceramic Polyacrylamide gel electrophoresis |
| Zdroj: | Journal of Materials Research and Technology, Vol 15, Iss, Pp 5833-5840 (2021) |
| ISSN: | 2238-7854 |
| DOI: | 10.1016/j.jmrt.2021.11.030 |
| Popis: | NaNbO3 powder was synthesized via the polyacrylamide gel method, growth behaviors and associated morphology were discussed. The calcined NaNbO3 powder at 565 °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 °C obtain highly sintering activity, dense NaNbO3 ceramic can sintering at 1200 °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 reaction method, the sintering temperature of NaNbO3 ceramic was be reduced in this work, which contribute for low-temperature sintering technical of NaNbO3 ceramics. |
| Databáze: | OpenAIRE |
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