摘要
通过具体的应用实例,系统介绍了在矿物材料学研究中硅酸盐体系的多相平衡反应热力学的基本原理。对硅酸盐体系的典型多相平衡反应进行了热力学计算,包括:(1)微晶玻璃制备过程中的硅酸盐熔融反应;(2)霞石正长岩和高铝粉煤灰利用技术中的硅酸盐烧结反应;(3)S iO2-CaO-H2O体系和KA lS i3O8-CaO-H2O体系雪硅钙石、硬硅钙石的水热晶化反应;(4)高铝粉煤灰和霞石正长岩烧结产物的溶解反应;(5)Na[A l(OH)4]-A l(OH)3-H2O体系和Na2SO4-Ca(OH)2-H2O体系中α-A l(OH)3和CaSO4.2H2O的析晶反应。研究成果可望对矿物材料制备实验方案设计、工业生产过程优化及改进产品性能提供理论指导,同时为同类材料学研究提供借鉴。
The basic principles of thermodynamics in multiple silicate systems were briefly reviewed with several typical approaches to mineral materials science. The thermodynamic calculations of the Gibbs free energies for typical multiple phase equilibria in silicate systems were performed, including （1） melting reactions of silicate reactant in processing of the glass-ceramics; （2） sintering reactions in utilizations of nepheline syenite and high- alumina flyash; （3） crystallizing reactions of tobermorite and xonotlite in both systems of SiO2-CaO-H2O and KAlSi3O8-CaO-H2O; （4） dissolution reactions of the sintering products of the high-alumina flyash and nepheline syenite; and （5） crystallizing reaction of α-Al（OH）3 and CaSO4·2H2O in system of Na[Al（OH）4]-Al（OH）3-H2O and Na2SO4-Ca（OH）2-H2O, respectively. Approaches to reaction thermodynamics for multiple phase equilibria in silicate systems are in theory of significance for designing experimental scheme of preparing mineral materials, optimizing processing techniques in industry, enhancing the properties of mineral materials products. The current research could also be used for reference in approaching to the similar mineral materials.
出处
《现代地质》
CAS
CSCD
北大核心
2006年第3期386-398,共13页
Geoscience
基金
教育部高等学校博士学科点专研科研基金项目(1999049114)
矿物材料国家专业实验室开放基金课题(04101
04103)
关键词
矿物材料
硅酸盐
热力学
微晶玻璃
霞石正长岩
高铝粉煤灰
雪硅钙石
mineral materials
silicate
thermodynamics
glass-ceramic
nepheline syenite
high-alumina flyash
tobermorite
