Study on hydrothermal synthesis dynamics of nanoscale xonotlite fibers

The xonotlite crystals were synthesized via the hydrothermal synthesis manner from CaO and SiO₂ as the raw materials with their Si/Ca molar ratio of 1.0. Hydrothermal synthesis dynamics of nanoscale xonotlite fibers was explored by masterly measuring the electrical conductivities 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 fibers synthesized via hydrothermal synthesis process is of $-{dc}_A/dt={kc}_A^{4/5}$. (paper)