硅酸盐学报2017，Vol.45Issue(12)：1782-1787,6.DOI:10.14062/j.issn.0454-5648.2017.12.09
Al2O3基陶瓷表面斑点及其析出相的表征
Characterization of Surface Freckle and Precipitates of Alumina Based Ceramic
摘要
Abstract
The characterization of surface freckles of 95%Al2O3 ceramics after high-temperature sintering is crucial for the improvement of surface flashover performance of alumina-based insulating ceramics. In this paper, the precipitated phases and chemical composition of the freckle area on the surface of 95%Al2O3 ceramic were analyzed by X-ray diffraction, time-of-flight secondary ion mass spectrometry, scanning electron microscopy, and energy dispersive spectroscopy, respectively. The results show that (Na, K)AlSi3O8 and Ca2Al2SiO7 aluminosilicates appear in the freckle area of 95%Al2O3 ceramic besidesα-Al2O3. The contents of Si and Ca in the freckle area decrease, while the contents of K, Na and Fe increase, compared to the contents of those elements on the normal surface of 95%Al2O3 ceramic. The variety of the element contents leads to the precipitation of the aluminosilicates and the formation of the freckle area on the surface of 95%Al2O3 ceramic.关键词
氧化铝陶瓷/暗斑/掠入射X射线衍射/飞行时间-二次离子质谱仪/铝硅酸盐Key words
alumica ceramic/freckle/grazing incidence X-ray diffraction/time-of-flight secondary ion mass spectrometry/aluminosilicates分类
通用工业技术引用本文复制引用
刘虹志,彭家根,杨松,吕平..Al2O3基陶瓷表面斑点及其析出相的表征[J].硅酸盐学报,2017,45(12):1782-1787,6.基金项目
国家自然科学基金(51604251) （51604251）
中国工程物理研究院电子工程研究所创新发展基金(S20151113). （S20151113）
