Preparation of barium sulfate polycrystal from barium peroxide matrix

详细信息	查看全文 | 推荐本文 |

• 作者：Xiaohui Zhang^a ; ^b ; Fengwen Yan^a ; ^{yanfw@iccas.ac.cn} ; Cunyue Guo^b ; Guoqing Yuan^a ; ^{yuangq@iccas.ac.cn}
• 关键词：Crystal growth ; Crystal structure ; Diffusion
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：1 August, 2012
• 卷：80
• 期：Complete
• 页码：117-120
• 文件大小：969 K

摘要

Morphological control of crystalline materials often plays a critical role in governing their properties. Here, microsoluble inorganic chemical BaO₂ is utilized as the matrix to prepare polycrystal BaSO₄ with corresponding macroscopic morphology. In-situ precipitation of Ba²⁺ realized by the competition of diffusion of Ba²⁺ decomposed from BaO₂ matrix and nucleation of BaSO₄ fabricates the polycrystal BaSO₄ with macroscopic morphology of single crystal BaO₂. The detailed studies demonstrate the pH value of solution and the concentration of SO₄^{2鈭?/sup> have important influences on the morphology and integrity of BaSO₄ polycrystal. This method may open a new general route for the synthesis of minerals with special macroscopic morphology.}