摘要
利用粉煤灰通过水热合成反应合成了单一方钠石,并对其进行了表征。经XRD分析,合成产物为单一方钠石,理想的结构式为Na8Al6Si6O24Cl24,晶胞参数为a0=0.889nm,z=1。经SEM观察,合成产物为规则球形,球形颗粒表面粗糙,紧密连接;合成的方钠石与原料粉煤灰化学组成最明显的变化是硅含量减少,S/A(SiO2与Al2O3质量比)由2.3降低至2.0。红外光谱和差热分析均显示了合成产物中自由水的存在。
Sodalite was synthesized from coal fly ash through hydrothermal reaction and was characterized. The main crystal mineral in synthesized product is sodalite by XRD and its ideal chemical structure formula is Na8Al6Si6024Cl24. The cell parameters are a0=0.889 nm, z=1. The results show that the crystal structure of synthesized product is spherical and rough adhered to each other. The mass ratio of SlOE to Al2O3 decreases from 2.3 to 2.0 during the synthesis process compared to chemical compositions of coal fly ash and synthesized product. The FT-IR spectrum and DTA curves indicate there is the free water in the synthesized product,
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2009年第2期366-371,共6页
The Chinese Journal of Nonferrous Metals
基金
国家高新技术研究发展计划资助项目(2007AA06Z128)
关键词
粉煤灰
方钠石
水热合成
模板剂
表征
coal fly ash
sodalite
hydrothermal synthesis
template
characterization
