Hydrothermal Synthesis of Spherical Bismuth Titanate Crystals

Abstract:

Spherical bismuth titanate (Bi₄Ti₃O₁₂) particles were synthesized by hydrothermal method using Bi(OH)₃, Ti(SO₄)₂ and KOH as raw materials, using polyvinylpyrrolidone (PVP) as the surfactant. The effects of concentration of the alkali solution, the reaction temperature and soaking time on the bismuth titanate crystal structure and morphology have been analyzed. XRD, SEM were used to characterize the crystal structure and microstructure of the as-prepared Bi₄Ti₃O₁₂.The results show that the temperature plays an important role on the morphology of the Bi₄Ti₃O₁₂.As the increase of the hydrothermal temperature, the Bi₄Ti₃O₁₂ has been transformed from the spherical morphology to fibrous morphology. The spherical Bi₄Ti₃O₁₂ powders with uniform distribution can be obtained when the concentration of KOH is from 1mol/L to 2 mol/L,the reaction temperature and hydrothermal time are 160°C and 24h respectively. SEM observation showed that the diameter of spherical Bi₄Ti₃O₁₂ is about 500 nm.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 7-10
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.7
• Online since: March 2014
• Authors: Xiang Ning Feng, Wei Zhao*, Hong Xing Wang, Wang Yang Jiang, Qin Li
• Keywords: Bismuth Titanate, Hydrothermal Synthesis, Spherical

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