Phase Structure of Nanocrystalline BaTiO₃ Powders via One-Step Solvothermal Route

Abstract:

5 nm BaTiO₃ powder has been successfully prepared by the one-step solvothermal method. The different grain size BaTiO₃ powders have been achieved after calcining the 5 nm Nanocrystalline BaTiO₃ powders at 700°C, 850°C and 950°C for 3 h. In-situ heating Raman spectroscopy revealed the dispersive phase transition character in the nanocrystalline BaTiO₃ powders. As the BaTiO₃ grain size decreases, wider phase transition temperature and the Raman intensity becomes weak. The BaTiO₃ powders of the 5 nm nanocrystalline exhibited the similar phase transformations from rhombohedral to orthorhombic to tetragonal to cubic transitions as those in the coarse BaTiO₃ ceramics.

• Periodical: Advanced Materials Research (Volume 833)
• Pages: 8-12
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.833.8
• Online since: November 2013
• Authors: Hui Zhang, Xiao Hui Wang, Zheng Bo Shen, Ya Nan Hao
• Keywords: Nanocrystalline BaTiO₃ Powders, Phase Structure, Size Effect, Solvothermal

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