研究了以超重力熔铸方法制备的Y2O3-Al2O3-SiO2玻璃的晶化行为,并结合相图分析了热处理条件对晶化过程的影响规律.实验结果表明,Y2O3-Al2O3-SiO2玻璃的晶化行为与热处理温度和SiO2含量密切相关.当热处理温度为1050℃时,晶化后样品的相组成沿超重力场方向呈现出梯度分布,自上而下分别为Al6Si2Oi3玻璃陶瓷、纯玻璃相、x-Al2O3玻璃陶瓷.当退火温度为1100℃时,析出晶相主要为Y3Al5O12及Y2Si2O7;退火温度为1200℃时主要析出Y3Al5O12.因此,以超重力熔铸法制备YAS玻璃结合后续热处理的工艺,提供了一种快速制备YAS基微晶玻璃的新方法.
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