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氟化钙对钠钙玻璃反应析晶制备玻璃陶瓷性能的影响

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Abstract:

用X射线衍射、Fourier变换红外光谱、扫描电子显微镜研究了不同氟化钙加入量的钠钙玻璃粉末在烧结过程中的反应析晶。结果表明未加入氟化钙时,以钙铝黄长石作为析晶促进剂,在850℃反应析晶生成硅灰石玻璃陶瓷;当析晶促进剂含量低于15%(质量分数,下同)时,添加6%氟化钙在850℃反应析晶生成枪晶石玻璃陶瓷。随氟化钙添加量增加,制备的枪晶石玻璃陶瓷气孔率逐渐增大,体积密度减小,抗弯强度降低。当氟化钙添加量为6%时,制得的枪晶石玻璃陶瓷抗弯强度达到68MPa。

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