Synthesis of Pure Bi12SiO20 Powder by Molten Salt Method

Jun Que Lu; Xiu Feng Wang; Hong Tao Jiang

doi:10.4028/www.scientific.net/AMM.182-183.52

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 182-183Synthesis of Pure Bi12SiO20 Powder by Molten Salt...

Synthesis of Pure Bi₁₂SiO₂₀ Powder by Molten Salt Method

Abstract:

Pure Bi₁₂SiO₂₀ powder was successfully prepared by a molten salt method using Bi₂O₃ and SiO₂ as raw materials and using KCl-K₂CO₃ as flux at 635°C with the heating rate of 5°Cmin^-1. The phase composition and microstructure of these products were analyzed by X-ray diffraction and scanning electron microscopy, and the effects of the processing parameters, such as the ratio of Bi₂O₃/SiO₂, calciniation temperature, isothermal time and relative amount of salt, on the composition and particle size were investigated. The results indicated that regardless of changing the ratio of Bi₂O₃/SiO₂, calciniation temperature, isothermal time or relative amount of salt the reaction only yielded Bi₁₂SiO₂₀ without Bi₂SiO₅ and Bi₄Si₃O₁₂. Henceforth, KCl-K₂CO₃ molten salts may be considered as an ideal reaction medium to synthesize pure phase of Bi₁₂SiO₂₀. The particle size of Bi₁₂SiO₂₀ phase can be determined by changing the temperature, isothermal time and relative amount of salt.

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Applied Mechanics and Materials (Volumes 182-183)

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52-56

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https://doi.org/10.4028/www.scientific.net/AMM.182-183.52

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June 2012

Authors:

Jun Que Lu, Xiu Feng Wang, Hong Tao Jiang

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Bi₁₂SiO₂₀, Bismuth Silicate, BSO, Molten Salt Method

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