Waste glass and fly ash derived glass-ceramic

被引:10
|
作者
Yoon, Soon-Do
Yun, Yeon-Hum
机构
[1] Chonnam Natl Univ, Dept Chem Technol Engn, Kwangju 500757, South Korea
[2] Chonnam Natl Univ, Dept Mineral & Energy Resources Engn, Kwangju 500757, South Korea
关键词
Compressive Strength; Diopside; Thermal Power Plant; Wollastonite; Chemical Durability;
D O I
10.1007/s10853-006-7019-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Crystallization behavior of a waste-based glass-ceramic was studied by means of X-ray diffraction analysis, and the surface morphological observations and chemical compositions were evaluated by field emission-scanning electron microscopy and energy dispersive X-ray spectrometry. Applying the mechanical milling method, the glass-ceramic was prepared by using fly ash from a thermal power plant mixed with waste glass cullet. Powder mixtures consisting of waste glass powder (70 wt%) and fly ash (30 wt%) were used to make glass-ceramic. Various heat treatment temperatures [900, 925, 950, 975, 1000 and 1025 degrees C] were used to obtain a glass-ceramic of the optimum crystal phase, mechanical properties and chemical durability. The X-ray diffraction analysis showed that the crystalline phases in the glass-ceramic were diopside [Ca(Mg, Al)(Si, Al)(2)O-6], augite [Ca(Mg, Fe)Si2O6] and wollastonite [CaSiO3]. The crystallization of an acicular phase in the matrix was achieved in the heat treatment temperature range of 1000-1025 degrees C, and the acicular type main crystal phase in the glass-ceramic was wollastonite [CaSiO3]. The heat treatment temperature range [1000-1025 degrees C] also showed much better mechanical properties. (c) 2006 Springer Science + Business Media, Inc.
引用
收藏
页码:4315 / 4319
页数:5
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