The Preparation Of MgO-Al₂O₃-SiO₂ System Glass-Ceramic And Computer Simulation Of Grain Growth

In this paper, the development, classification, fabrication technology and application of glass-ceramics (mainly about MgO-Al₂O₃-SiO₂ system) were systematically reviewed. A brown glass-ceramics of MgO-Al₂O₃-SiO₂ system were synthesized by the melting method and annealing technique, TiO₂ as nucleation agent. The crystallization heat-treated schedules (?) (?)etermined by DTA results. The main crystal phase of the glass-ceramics was analyzed by XRD, and its microstructures were observed by SEM. Experiments showed that the main crystal phase is Cordierite, about 50nm in size among the glass matrix. The optical transmittance was about 70% in the visible by UV-VIS-NIR.Grain growth models have been constructed on the basis of detailed studying about the procedure of grain growth. The theories and methods of grain growth have also been emphatically analyzed respectively. We use the Monte Carlo sampling technique on the base of computer simulation technique. Unlike the traditional DLA methods, the grains are simultaneously introduced into the system. A simplified model of interactive potential of grains was founded as a control limit to the diffusion, congregation and adsorptions probabilit?? We have accomplished the computer simulation of normal grain growth by making program on personal computer. The microstructures obtained are similar to which got from the experiments.