CAO Chao1, PENG Tong-jiang1, 2, DING Wen-jin1
(1. Key Laboratory of Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Ministry of Education, Mianyang 621010, China;
2. Institute of Mineral Materials & Application, Southwest University of Science and Technology; Mianyang 621010, China)
Abstract: The glass-ceramics was prepared with coal fly ash, limestone and Na2CO3 by sintering process. Crystallization behavior, microstructure and physicochemical properties of glass-ceramics samples were analyzed by means of DTA, XRD, SEM and other analytical methods. The results show that the major phase of the glass-ceramics samples under certain heating treatment was gehlenite (Ca2Al2SiO7), and [K(Na, K)3Al4Si4O16] was the minor crystalline phase. The glass-ceramics with the highest dense which was 2.82 g/cm3 and the best chemical stability were obtained by nucleating at 760 ℃, then crystallizing at 960 ℃. The glass-ceramics consist of small crystals with sizes ranging from 0.4 to 0.6 μm.
Key words: solid waste; coal fly ash; glass-ceramics; nucleation; crystallization
E-mail: caochao85 @163.com
ACTA MINERALOGICA SINICA Vol. 33, No. 2, 2013, Page 141-146
