Microwave sintering of mullite–cordierite precursors prepared from solution combustion synthesis
Microwave sintering of mullite–cordierite precursors prepared from solution combustion synthesis
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DOI：
10.1016/j.ceramint.2015.03.314
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发表时间：
2015-09
影响因子：
5.2
通讯作者：
L. Nikzad;S. Ghofrani;H. Majidian;T. Ebadzadeh
中科院分区：
文献类型：
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作者：
L. Nikzad;S. Ghofrani;H. Majidian;T. Ebadzadeh
以甘氨酸为燃料，硝酸铝、硝酸镁和硅溶胶为反应物，采用溶液燃烧法合成了莫来石-堇青石复合材料。研究了燃料与氧化剂的比例对燃烧行为以及形成的粉末的化学成分和形貌的影响。所有合成的粉末均为亚微米级的非晶粉末。结果表明，在不进行热处理的情况下，改变燃料与氧化剂的比例对合成该复合材料没有影响。当配比小于1（富燃料）时，复合粉末的最小粒径为302 nm。在1200和1400 °C微波加热后检测到莫来石、堇青石和尖晶石。当燃料与氧化剂的化学计量比被选择时，莫来石和堇青石被检测为唯一的结晶相，并且该复合材料获得了2.61 g/cm 3的最高密度。
Mullite–cordierite composite was synthesized using the solution combustion synthesis method and glycine as a fuel and aluminum nitrate, magnesium nitrate and colloidal silica as the reagents. The effect of fuel to oxidizer ratio on the combustion behavior, as well as chemical composition and morphology of the formed powders was investigated. All synthesized powders were amorphous with submicron particle size. It was found that the change of fuel to oxidizer ratio had no effect on synthesis of this composite without heat treatment. The smallest particle size of composite powder was obtained as 302 nm for ratio less than 1 (rich of fuel). Mullite, cordierite and spinel were detected after microwave heating at 1200 and 1400 °C. Mullite and cordierite were detected as the only crystalline phases when the stoichiometric ratio of fuel to oxidizer was chosen and this composite obtained the highest density of 2.61 g/cm3.