冷却速度和添加剂对SiO_2-Al_2O_3-CaO(MgO-Fe_2O_3-Na_2O)系玻璃分相的影响

Effect of Cooling Rate and Additive on Phase Separation of SiO_2Al_2O_3CaO(MgOFe_2O_3Na_2O) System Glass

运用ＸＲＤ，ＳＥＭ，ＤＴＡ和化学分析等手段研究了不同冷却速度及添加剂对ＳｉＯ２－Ａｌ２Ｏ３－ＣａＯ（ＭｇＯ－Ｆｅ２Ｏ３－Ｎａ２Ｏ）系玻璃分相及性能的影响。结果发现不同冷却速度处理对玻璃的分相有明显影响，使玻璃呈不同颜色，其中冷却速度为１５℃／ｍｉｎ处理得到的玻璃其抗折强度高于６００℃退火玻璃。ＴｉＯ２的加入对分相影响显著。

The effects of different cooling rates and additives on the phase separation and properties of SiO_2Al_2O_3CaO(MgOFe_2O_3Na_2O) glass have been studied by means of DTA,SEM,XRD and chemical analysis,and it is found that the glass had obvious phase separation and various colours at different cooling rate,and the tensile strength of the glass phase separated at the cooling rate of 15℃/min is higher than that of the glass annealed at 600℃Additive TiO_2 has a remarkable effect on the phase separation of glass