Formation of micro-porous spherical particles of calcium silicate (xonotlite) in dynamic hydrothermal process--颗粒学报PARTICUOLOGY

Li, M., & Liang, H. (2004). Formation of micro-porous spherical particles of calcium silicate (xonotlite) in dynamic hydrothermal process. China Particuology, 2(3), 124-127. https://doi.org/10.1016/S1672-2515(07)60037-2

Formation of micro-porous spherical particles of calcium silicate (xonotlite) in dynamic hydrothermal process

Maoqiang Li ^a *, Hongxun Liang ^b

a China Building Materials Academy, Beijing 100024, P. R. China
b Zhongbei Glass Technology Company, Beijing 100831, P. R. China

10.1016/S1672-2515(07)60037-2

Volume 2, Issue 3, June 2004, Pages 124-127

Received 19 February 2004, Accepted 30 March 2004, Available online 27 November 2007.

E-mail: mql@public3.bta.net.cn

Highlights

Abstract

Stirring during hydrothermal synthesis plays an important role in the formation of porous spherical xonotlite particles. The size of spherical particles formed during dynamic hydrothermal process is related to the size of minimum vortices in the reaction slurry, which is determined by stirring speed. The kinetics of growth of xonotlite particles is determined by measuring the apparent viscosity of the reactant slurry at various reaction time and reaction temperatures. It is found that the growth of particles follows the contracting-volume equation, and the activation energies for nucleation and growth are 104 and 123 kJ·mol⁻¹, respectively.

Graphical abstract

Keywords

porous particle; xonotlite; dynamic hydrothermal synthesis

文章导读