pH值对硅酸钇涂层结构影响的研究  

Investigation on Influence of pH Value on Phase and Microstructure of Yttrium Silicates Coatings

作　　者：黄剑锋[1] 邓飞[1] 吴建鹏[1] 罗宏杰[2] 曹丽云[3] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西咸阳712081 [2]中国科学院上海硅酸盐研究所,上海200050 [3]陕西科技大学化学与化工学院,陕西咸阳712081

出　　处：《航空材料学报》2006年第5期77-80,共4页Journal of Aeronautical Materials

基　　金：陕西省自然科学基金(2005E108);陕西科技大学博士科研基金(BJ05-3);陕西科技大学研究生创新基金(YC05-3)

摘　　要：采用一种新颖的水热电沉积方法直接在石墨表面制备了硅酸钇涂层，利用XRD，EDS和SEM等测试手段对涂层进行测试分析，重点研究了电沉积前驱溶液pH值对涂层显微结构的影响。结果表明：当前驱液的pH值为1．5～3．0及水热温度为150℃时，即可制备出硅酸钇涂层。随前驱液pH值增加，涂层开裂趋势减弱，结晶趋势增强，致密度有所提高。Yttrium silicates coatings were prepared with a novel hydrothermal electrodepostion method on the graphite surface directly. The phases and microstructures of the coatings were characterized by XRD, EDS and SEM analyses. The influence of pH value of the precursor solution on the phase and microstructure was investigated primarily. It showed that the yttrium silicates coatings could be obtained with the pH value in the scope of 1.5 -3.0 at 150℃. With the increase of pH value, micro-cracks and micro-pores of the coatings decrease; and the crystallinity and density of the coatings have been improved correspondingly.

关 键 词：硅酸钇涂层 PH值 显微结构 水热电沉积 石墨 

分 类 号：TQ174[化学工程—陶瓷工业]