超重力熔铸Y_2O_3-Al_2O_3-SiO_2玻璃的晶化行为研究  

Investigation on Crystallization Behavior of Y_2O_3-Al_2O_3-SiO_2 Glass Prepared by High-gravity Combustion Synthesis

作　　者：杨增朝[1,2] 刘光华[2] 徐利华[1] 李江涛[2] 郭世斌[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]中国科学院理化技术研究所,北京100190

出　　处：《无机材料学报》2013年第7期780-784,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(50932006;51002163);北京市自然科学基金(2112043)~~

摘　　要：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Al6Si2O13玻璃陶瓷、纯玻璃相、χ-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。The crystallization behavior of Y2O3-Al2O3-SiO2 glass prepared by high-gravity combustion synthesis was investigated by isothermal annealing experiments.The effect of annealing condition on the crystallization behavior of the glass was discussed according to the Y2O3-Al2O3-SiO2 ternary phase diagram.From experimental results,the crystallization behavior of the glass strongly depended on the annealing temperature and the content of SiO2.After being annealed at 1050℃,the sample showed a graded phase distribution along the high-gravity direction,consisting of Al6Si2O13 glass-ceramic,pure glass and χ-Al2O3 glass-ceramic.At annealing temperature of 1100℃,Y3Al5O12 and Y2Si2O7were precipitated as the major crystalline phases.When the annealing temperature further increased to 1200℃,the predominant crystalline phase was Y3Al5O12.The research provides a possible way to prepare Y2O3-Al2O3-SiO2 glass-ceramics by integrating high-gravity combustion synthesis with post annealing treatment.

关 键 词：超重力熔铸 YAS玻璃 退火 晶化 

分 类 号：TB321[一般工业技术—材料科学与工程]