快速淬冷方式对高温合成负膨胀ZrW_2O_8陶瓷材料的影响Effect of Rapid Quenching Process on the Negative-Thermal-Expansion Materials ZrW_2O_8 Prepared by High-Temperature Sintering
向绍斌;肖秋国;张飞;彭美勋;申少华;
摘要(Abstract)：
以分析纯氧氯化锆和仲钨酸铵为原料,研究了合成负膨胀ZrW2O8陶瓷材料过程中,不同的热处理时间(1~8 h)、空气和液氮两种淬冷介质条件下对产品物相成分的影响。采用X射线衍射仪(XRD)、傅立叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)和热机械分析仪(TMA)对样品结构、形貌和热膨胀性能进行表征。研究结果表明在1200℃温度下热处理时间延长到6 h后,并在液氮中淬冷,实验最终产物为单一的立方相的α-ZrW2O8;采用热机械分析仪测得在空气和液氮淬冷介质条件下,25~400℃温度范围内样品的平均热膨胀系数分别为-8.02×10-6K-1和-9.58×10-6K-1。
关键词(KeyWords)： ZrW2O8;淬冷;XRD;热膨胀系数
基金项目(Foundation): 湖南省自然科学基金资助项目(11JJ5025);; 煤炭资源清洁利用与矿山环境保护湖南省重点实验室开放基金资助项目(E21223)
作者(Author): 向绍斌;肖秋国;张飞;彭美勋;申少华;
Email:
DOI: 10.16521/j.cnki.issn.1001-9642.2014.10.004
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