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微斜长石粉体水热合成六方钾霞石及其表征

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Abstract:

在KOH溶液浓度为6~10mol/L,水热反应温度为240~280℃,反应时间为2~8h的条件下,研究了以微斜长石粉体为原料水热合成六方钾霞石的可行性。X射线衍射分析结果表明合成产物为纯相的六方钾霞石,没有非晶态物质和其它KAlSiO4的多型。Fourier变换红外光谱、29Si和27AlMAS核磁共振分析表明合成的六方钾霞石晶体结构中Si和Al是完全有序的。扫描电子显微镜研究结果表明合成产物的形态为六方板状,晶粒尺寸约为800~1000nm。与其它合成六方钾霞石的方法相比,本方法原料来源广泛,成本低廉,合成条件温和,工业应用前景广泛。

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