期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 55, 期 2, 页码 229-234出版社
SPRINGER
DOI: 10.1007/s10971-010-2238-1
关键词
Nanocrystalline NaNbO3; Aqueous solution-gel; Phase evolution; Raman spectra
资金
- National 973-project of China [2009CB623302]
- NSFC [10979035, 60871044, 50835007]
- International S&T Cooperation Program of China [2009DFA51820]
Nano-sized NaNbO3 powder has been successfully prepared by aqueous solution-gel method. The phase evolution of NaNbO3 powder is investigated by TG/DSC, X-rays spectra, FT-IR, and Raman spectra. The results show that the pure NaNbO3 phase has been obtained at about 375 A degrees C, which is lowered by about 100 A degrees C comparing to others' work. In TEM studied, it shows the average particle size of similar to 70 nm for the powders heat-treated at 750 A degrees C for 4 h. The powders heat-treated below 650 A degrees C for 4 h shows a Pmnm symmetry, then change from O-3 orthorhombic to O-1 orthorhombic with the heat-treatment temperature above 650 A degrees C.
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