Study on hydrothermal synthesis dynamics of xonotlite spherical particles

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Liu, F.^1,2,3 ; Chen, S.^1,3 ; Lin, Q.^1,2 ; Wang, X.D.^2 ; Cao, J.X.^1,2,3

School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou

550025, China^1

Key Laboratory of Green Chemical and Clean Energy Technology, Guiyang, Guizhou

550025, China^2

Key Laboratory of Efficient Utilization of Mineral and Green Chemical Technology, Guiyang, Guizhou

550025, China^3

关键词: Calcium concentration;    Calculated values;    Crystalline phasis;    Fourth order Runge-Kutta methods;    Least-squares-fitting method;    Reaction temperature;    Spherical particle;    Spline interpolation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012050/pdf
DOI  :  10.1088/1757-899X/292/1/012050

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The xonotlite crystals were synthesized via the hydrothermal synthesis manner from CaO and SiO2as the raw materials with their Si/Ca molar ratio of 1.0. The products were characterized by XRD and SEM techniques to investigate their crystalline phases and morphologies. Hydrothermal synthesis dynamics of xonotlite spherical particles was explored by masterly measuring the pH and the calcium concentrations of product slurries synthesized at various reaction temperature in this paper. The results indicated that the calculated values of the products' quality at various reaction temperatures were consistent with the measured values. Based on chemical reaction kinetic, using fourth-order Runge-Kutta method, spline interpolation and least-squares fitting method, the dynamic relationship of xonotlite spherical particles synthesized via hydrothermal synthesis process is of-dcA/dt = kcA0.9.