Finite Element Simulation on the Heat Transfer in the Crystallization Behavior Process of Glass-ceramics
LIU Hongpan1, HUANG Xiaofeng1, MA Liping1, SHANG Zhibiao1, LIU Xiuzhuang1, ZHAO Dan1, JIANG Ming2
1 Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500; 2 College of Resources and Environment, Yunnan Agricultural University, Kunming 650201
Abstract: The CaO-Al2O3-SiO2(CAS) glasses that were prepared by natural cooling yellow phosphorus furnace slag were taken as research objects. On the basis of ANSYS finite element analysis, the numerical simulation of the crystallization behavior process of glass-ceramics was carried out to obtain the curve equation of the center point and the end point temperature field of the glass changing with time. The results show that the variation of center temperature and the endpoint temperature value of internal glass with time have a high fitting degree with the exponential equation in the stage of heating from room temperature to nucleation temperature (25—780 ℃) and from the nucleation temperature to crystallization temperature (780—1 080 ℃). In order to prevent the large temperature gradient distribution and thermal stress generation in the heating process of the crystallization behavior process of glass-ceramics, the heating rate should be controlled at 2—4 ℃/min in the stage of 25—780 ℃ and at 0—2 ℃/min in the stage of 780—1 080 ℃ respectively. Through differential thermal analysis and X-ray diffraction, the glass specimen were heated to nucleation temperature (780 ℃) at 3 ℃/min, and then heated to crystallization temperature (1 080 ℃) at 1 ℃/min to obtain the CaO-Al2O3-SiO2 microcrystalline glass, which was then verified by experiment to obtain the glass-ceramics with excellent property whose main crystalline phase were wollastonite (CaSiO3), containing wollastonite type of solid solution of iron ((Ca,Fe)SiO3).
刘红盼, 黄小凤, 马丽萍, 尚志标, 刘秀状, 赵丹, 蒋明. 基于有限元法模拟微晶玻璃的微晶化加热过程*[J]. 《材料导报》期刊社, 2017, 31(20): 164-169.
LIU Hongpan, HUANG Xiaofeng, MA Liping, SHANG Zhibiao, LIU Xiuzhuang, ZHAO Dan, JIANG Ming. Finite Element Simulation on the Heat Transfer in the Crystallization Behavior Process of Glass-ceramics. Materials Reports, 2017, 31(20): 164-169.
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