Synthesis of AI-substituted 11(A) Tobermorite from Aegirine-augite Syenite Potash Ores by Hydrothermal Reaction at 300 ℃
The Al-substituted 11(A) tobermorite was synthesized from aegirine-augite syenite potash ores by alkaline hydrothermal reaction at 300 ℃.The obtained tobermorite was characterized by chemical analysis,X-ray diffraction and scanning electron microscopy.The effect of reaction time on the tobermorite formation and the dissolution ratio of the K2O in the potash ores were investigated.It was revealed that the dislocation ratio of K2O increases with increasing reaction time.The main rock constituents were converted into a well-crystallized Al-substituted 11(A) tobermorite after 3 hours hydrothermal reaction at 300 ℃.The obtained Al-substituted tobermorite forms hollow spherical aggregates with the diameter of 40μm-80μm by the crossing of fibrous tobermorite crystal together.The A13+ may substitute isomorphously up to 15 at % of Si4+ in the obtained tobermorite.
Aegirine-augite Syenite Hydrothermal reaction Al-substituted Tobermorite
Yuqin Liu Hongtu Xia Hongwen Ma
School of Materials Science and Technology,China University of Geosciences,Beijing 100083,China
国际会议
大理
英文
788-793
2011-08-18（万方平台首次上网日期，不代表论文的发表时间）