粉煤灰动态水热合成纳米复合托贝莫来石晶须及其表征  

Preparation of Nanocomposite Tobermorite Whiskers with Fly Ash by Dynamic Hydrothermal Method and Their Characterization

作　　者：吕松青[1,2] 马淑花[2] 郭曦尧 郑诗礼[2] 郭奋[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190 [3]北京科技大学冶金与生态工程学院,北京100083

出　　处：《过程工程学报》2014年第3期487-492,共6页The Chinese Journal of Process Engineering

基　　金：国家高技术研究发展计划(863)基金资助项目(编号:2011AA060701);国家科技支撑计划基金资助项目(编号:2012BAF03B01)

摘　　要：以山西某地普通粉煤灰为原料,采用动态水热法合成纳米复合托贝莫来石晶须,考察了CaO/SiO2摩尔比、反应温度、液固比、反应时间的影响.结果表明,以预活化的普通粉煤灰为原料,控制CaO/SiO2摩尔比为1.0、液固比为25 mL/g,在220℃下水热反应10 h,可制备出晶须长/径比大于20的纳米复合托贝莫来石晶须,优化条件下晶须可相互缠绕成中空球形颗粒,纯度达80%以上.Nanocomposite tobermorite whiskers were prepared by dynamic hydrothermal method using ordinary fly ash from somewhere in Shanxi as raw material. The effects of molar ratio of CaO to SiO2, reaction temperature, ratio of liquid to solid and reaction time on the synthesis of tobermorite whiskers were examined. The results showed that nanocomposite tobermorite whiskers with the ratio of length to diameter at over 20 were synthesized under the conditions of molar ratio of CaO to SiO2 at 1, ratio of liquid to solid 25 mL/g, reaction temperature 220℃ and reaction time for 10 h. The nanocomposite tobermorite whiskers were intertwined into hollow spherical particles, and their purity reached over 80%.

关 键 词：托贝莫来石 晶须 粉煤灰 动态水热法 

分 类 号：TU541[建筑科学—建筑技术科学]