Molten Salt Synthesis of Anisotropy BaBi₄Ti₄O₁₅ Powders in K₂SO₄-Na₂SO₄ Flux

Abstract:

Anisotropic BaBi₄Ti₄O15 powder was synthesized by a molten salt synthesis (MSS) method in K₂SO₄-Na₂SO₄ flux and the effects of different process parameters such as calcining temperature, and ratio of salt to reactant (R) on the phase formation and morphology of anisotropic BaBi₄Ti₄O₁₅ particles were also investigated. The as-synthesized powder calcined at 850-950°C exhibits a single tetragonal BaBi₄Ti₄O₁₅ phase. The morphology of BaBi₄Ti₄O₁₅ powder could be adjusted by changing the synthesis conditions. The average particle size (APS) of BaBi₄Ti₄O₁₅ powder increased with R changing from 0.8 to 1.0, while it decreased with further increasing of R to 1.2. In addition, the APS increased with increasing calcining temperature and it showed an Arrhenius dependence on the temperature. The corresponding apparent activation energy for particle growth is 31.9kJ/mol for calcining temperature of 850-1000°C.

• Periodical: Materials Science Forum (Volume 687)
• Pages: 333-338
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.687.333
• Online since: June 2011
• Authors: Yong Jun Gu, Jin Liang Huang, Li Hua Li, Ke Zhang, Xiao Wang, Qian Li, Xiao Hua Tan, Hui Xu
• Keywords: Anisotropic, Barium Bismuth Titanate, Molten Salt Synthesis

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