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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 5640545, 8 pages
http://dx.doi.org/10.1155/2016/5640545
Research Article

Transformation Mechanism of Fluormica to Fluoramphibole in Fluoramphibole Glass Ceramics

1School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China
2Dalian Environmental Monitoring Center, Dalian 116023, China

Received 2 March 2016; Accepted 24 May 2016

Academic Editor: Santiago Garcia-Granda

Copyright © 2016 Wei Si et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

During isothermal sintering at 820°C, the transformation mechanism of fluormica to fluoramphibole in powder compacts of fluormica and soda-lime glass was investigated using differential thermal analysis, infrared reflection spectrometry, X-ray diffraction, scanning electron microscopy, and so forth. Results show that an interaction between fluormica and glass occurred during isothermal heating; O2−, Na+, and Ca2+ ions were diffused from glass to fluormica. This diffusion facilitates the transformation of the sheet structures of fluormica crystals to double-chain structures by the breakage of bridge oxygen bonds in the sheet. Subsequently, the broken two parallel double chains were rearranged by relative displacement along the -axis direction of the fluormica crystal and were linked by Na+ and Ca2+ ions to form fluoramphibole. A crystallography model of fluormica-fluoramphibole transformation was established in this study.