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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27Al MAS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。
Under the conditions of KOH solution concentration of 6 ~ 10mol / L, hydrothermal reaction temperature of 240 ~ 280 ℃ and reaction time of 2 ~ 8h, hexagonal K - nepheline was hydrothermally synthesized from micro - plagioclase powder feasibility. The results of X-ray diffraction analysis show that the synthesized product is pure hexagonal kaliastite, and there is no polymorphism of amorphous materials and other KAlSiO4. Fourier transform infrared spectroscopy, 29Si and 27Al MAS NMR analysis showed that Si and Al were completely ordered in the synthesized hexagonal akaerythite crystal structure. Scanning electron microscopy results show that the morphology of the synthesized product is hexagonal plate, the grain size is about 800 ~ 1000nm. Compared with other methods for synthesizing hexavalenite, the method has the advantages of wide sources of raw materials, low cost, mild synthesis conditions and broad industrial application prospect.