Low temperature synthesis of forsterite from hydromagnesite and fumed silica mixture

被引：47

作者：

Chen, Liugang ^{[1
,2
]}

Ye, Guotian ^{[1
]}

Wang, Qingfeng ^{[1
]}

Blanpain, Bart ^{[2
]}

Malfliet, Annelies ^{[2
]}

Guo, Muxing ^{[2
]}

机构：

[1] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[2] Katholieke Univ Leuven, Dept Mat Engn, BE-3001 Leuven, Belgium

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Calcination; Powders: solid state reaction; Electron microscopy; Silicate; NANOCRYSTALLINE FORSTERITE; MG2SIO4; MGO;

D O I：

10.1016/j.ceramint.2014.10.025

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

081705 [工业催化]; 082905 [生物质能源与材料];

摘要：

Forsterite was prepared via solid-state reaction by using hydromagnesite (basic magnesia carbonate) and fumed silica, aiming at completing the reaction 2MgO + SiO2 -> Mg2SiO4 at low calcination temperature. The phase development and morphology evolution of the hydromagnesite and hydromagnesite fumed silica mixture during heat treatment were characterized by means of scanning electron microscopy (SEM), Brunauer Emmett Teller (BET) nitrogen-gas adsorption method, and X-ray powder diffraction (XRD). A diffusion distance of less than 300 nm for Mg2+ and Si-4 for forsterite formation was obtained because the formed high reactivity MgO with the nanosheet structure of its parental hydromagnesite and the fumed silica with particle size of less than 100 nm were homogeneously mixed. Monolithic forsterite was synthesized after calcination of the hydromagnesite fumed silica mixture at 1100 degrees C. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2234 / 2239

页数：6

共 19 条

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