Preparation of forsterite (Mg2SiO4) powders via an aqueous route using magnesium salts and silicon tetrachloride (SiCl4)
Preparation of forsterite (Mg2SiO4) powders via an aqueous route using magnesium salts and silicon tetrachloride (SiCl4)
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DOI：
10.1023/a:1008732808079
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发表时间：
1999-09-01
影响因子：
2.5
通讯作者：
James, PF
中科院分区：
文献类型：
--
作者：
Mitchell, MBD;Jackson, D;James, PF
通过将SiCl4与Mg(CH3COO)(2)的水溶液混合，制备了镁橄榄石(Mg2SiO4)粉末。4H(2)O或Mg(NO3)(2)。6H(2)O，加热粉状凝胶。用热分析(DTA和TGA)、X射线衍射仪(X射线衍射仪)、氮气吸附比表面积分析(BET)和透射电子显微镜(TEM)对粉末进行了表征。加热时，除镁橄榄石外，还观察到了镁辉石和顽辉石(MgSiO_3)。当加热到1200℃时，镁橄榄石是由硝酸镁(2)制备的粉末中的主要物相。6H(2)O，镁(CH3COO)(2)制得的粉末中以氧化镁为主。4H(2)O，一次粒径在100~500 nm之间，热处理后基本保持不变。然而，温度越高，一次粒子团聚的大小和密度就越大。
Forsterite (Mg2SiO4) powders were prepared by mixing SiCl4 with aqueous solutions of either Mg(CH3COO)(2). 4H(2)O or Mg(NO3)(2). 6H(2)O and heating the powdered gel. The powders were characterised using thermal analysis (DTA and TGA), X-ray diffraction (XRD), nitrogen adsorption surface area analysis (BET) and transmission electron microscopy (TEM). On heating, MgO and enstatite (MgSiO3) were observed in addition to forsterite. On heating to 1200 degrees C, forsterite was the dominant phase in the powders produced from Mg(NO3)(2). 6H(2)O, and MgO was the dominant phase in the powders produced from Mg(CH3COO)(2). 4H(2)O. The primary particle sizes of these powders were between 100 and 500 nm, which remained the same on heat treatment. However, higher temperatures gave rise to an increase in the size and densities of the agglomerates of primary particles.