稀土掺杂锆酸钐陶瓷粉性能的研究
毕业论文关键词：陶瓷粉；锆酸钐；离子掺杂
Research on the properties of zirconate samarium ceramic powder doped with rare earths ions
Abstract: In this article, zirconate samarium ceramic powder was prepared by the reaction of high temperature solid-phase, and made Sm2Zr2O7 ceramic power doped with kinds of metal ions, such as Y, Dy, Mg and Ce. The research shows the effection to the ceramic powder properties according to the varieties of the ions doped with. XRD, SEM, IR, rigidity test, and the coefficient of thermal expansion are also experimented. The experiments show that the pyrochlore-type structure can’t be changed if mingled with Y, Dy, and Mg, but some kinds of ratio of Zr and Ce can change the pyrochlore-type structure of Sm2Zr2O7, when the ratio of Zr and Ce is 7:3, the sample dosen’t have pyrochlore-type structure. Ions doping can change zirconate samarium appearance characteristics, such as reduce pore structure, the particals g combine closer. The doping of the ions can elevate the compactness of Sm2Zr2O7 ceramic power and the compactness will clevate with the elevating of the temperature. The doping of the ions can clevate the rigidity of Sm2Zr2O7. The doping of the ions can change the coefficient of thermal expansion of Sm2Zr2O7 in varying degrees. Because there are still not many research reports about zirconate samarium ceramic powder, according to it’s excellent properties, it will be the research emphasis in the future.
Keywords: ceramic power；zirconate samarium；rare earths doping
目 录
1.引言 1
1.1 热障涂层陶瓷材料相关介绍 1
1.1.1 传统热障涂层陶瓷材料 1
1.1.2 新型热障涂层材料 2
1.2 稀土锆酸盐热障涂层陶瓷材料的制备方法 3
1.3 稀土元素掺杂对稀土锆酸盐性能的影响 6
1.4 本课题的研究内容及意义 7
1.4.1研究内容 7
1.4.2研究意义 8
2 实验部分 9
2.1 实验试剂与仪器 9
2.2 固相法制备Sm2Zr2O7和离子(Y、Dy、Mg、和Ce)掺杂的Sm2Zr2O7 10
2.3 工艺条件的选择 11
2.3.1 合成温度的选择 11
2.3.2 不同离子掺杂的选择 11
2.4 产品的表征与性能测试 11
2.4.1 XRD测试 11
2.4.2 扫描电子显微镜观测 11
2.4.3 产品组成成分分析 12
2.4.4 红外分析 12
2.3.5 硬度的测定 12
2.3.6 热重-差热分析 12
2.3.7 热膨胀系数的测定 12
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