罗军明,邓莉萍,艾云龙,温祯洪

• 1:南昌航空大学材料科学与工程学院

摘要(Abstract)：

以Y2O3为基质材料,掺杂不同含量的La3+,采用机械力化学法制备纳米粉,粉体压制后在真空度1×10-3Pa下烧结得到La3+掺杂Y2O3透明陶瓷。采用透射电子显微镜(TEM)观察粉体一次颗粒形貌,扫描电镜(SEM)观察样品表面形貌,HV-1000型维氏硬度计测定样品硬度和断裂韧性,阿基米德法测定烧结后试样的相对密度,自动记录分光光度计测定试样透过率。结果表明:制备的La3+∶Y2O透明陶瓷透光率可达80%,掺杂La3+可以显著降低La3+∶Y2O3透明陶瓷的烧结温度;随着La2O3添加量的提高,样品透光率逐渐提高,但La2O3添加量过大会造成点阵畸变严重;随着La2O3添加量的提高,样品相对密度、维氏硬度和断裂韧性均逐渐提高,最后趋于平稳;随着保温时间延长,样品透光率也逐渐增大,继续增大保温时间,透光率趋于平缓。结合样品的透光率、相对密度、维氏硬度和断裂韧性考虑可知La2O3适合掺杂量、烧结温度和保温时间分别为10at%、1550℃和3h。

关键词(KeyWords)： La3+掺杂Y2O;透明陶瓷;机械力化学法

Abstract:

Keywords:

基金项目(Foundation): 航空科学基金(2008ZF56010);; 江西省自然科学基金(2007GZC1553);; 江西省教育厅科研项目(GJJ09199);; 南昌航空大学科研基金(EA200901029)

作者(Author): 罗军明,邓莉萍,艾云龙,温祯洪

DOI: 10.13289/j.issn.1009-6264.2010.03.001

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