Effect of Excess MgO Mole Ratio in a Stoichiometric Cordierite (2MgO·2Al2O3·5SiO2) Composition on the Phase Transformation and Crystallization Behavior of Magnesium Aluminum Silicate Phases
Effect of Excess MgO Mole Ratio in a Stoichiometric Cordierite (2MgO·2Al2O3·5SiO2) Composition on the Phase Transformation and Crystallization Behavior of Magnesium Aluminum Silicate Phases
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DOI：
10.1111/j.1744-7402.2010.02486.x
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发表时间：
2011-05
影响因子：
2.1
通讯作者：
J. Banjuraizah;H. Mohamad;Z. Ahmad
中科院分区：
文献类型：
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作者：
J. Banjuraizah;H. Mohamad;Z. Ahmad
采用X射线衍射（XRD）、差热分析（DTA）和热重分析（TGA）研究了MgO过量（摩尔比2.0-4.0）对μ-堇青石晶化行为和纯度的影响。使用HighScore Plus软件进行定量XRD（Rietveld技术）。采用以滑石和高岭土为主要原料，并辅以MgO、Al 2 O3和SiO2的玻璃晶化工艺路线。玻璃的析晶温度随MgO摩尔比的变化而降低。当MgO含量小于2.8mol时，α-堇青石的生成量最高可达94wt%。当摩尔比大于2.8时，镁橄榄石相开始出现，同时出现莫来石、μ-堇青石和尖晶石相。
The effect of excess MgO, 2.0–4.0 mol ratios on the crystallization behavior and purity of μ-cordierite was investigated using X-ray diffraction (XRD), differential thermal analyzer, and TGA. Quantitative XRD, the Rietveld technique, was carried out using the HighScore Plus software. The glass crystallization process route was used with talc and kaolin as the main raw materials and compensated with MgO, Al2O3, and SiO2 accordingly. The crystallization temperature of the glasses decreased as a function of the MgO mole ratio. Less than 2.8 mol MgO increased the formation of α-cordierite up to 94 wt%. However, above 2.8 mol ratio, the forsterite phase started to appear, together with mullite, μ-cordierite, and spinel.