Author:
Duan He ,Zheng Yu-Feng ,Zhang Xiao-Gang ,Sun Yan-Fei ,Dong You-Zhong ,
Abstract
Single_phase iron pyrite (FeS22) crystalpowder was prepared by so l_gel hydrothermal method, which was characterized via x_ray diffraction, Fourier transform infrared and scanning electron microscope. A simplified mathematic model was established to analyze the crystal growth process. Results indicate that phase transformation and diffusion mechanism control the process, which fits the secon d_order kinetic equation with an exponent 3215 for time t. This is a decel erated process that can be divided into three steps: during the first period, ma rcasite and pyrite phases are produced, and then with inducting of sulfur into t he reaction, the process is dominated by the merging of marcasite into pyrite. U ltimately, with the fuse of small grains and the growing of larger ones, single_ phase iron pyrite crystals grow up through diffusion mechanism.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Cited by
2 articles.
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