电化学技术制备Ba_xCa_(1-x)MoO_4(0≤x≤1)固溶体陶瓷厚膜  

Preparation of Ba_xCa_(1-x)MoO_4(0≤x≤1)Ceramic Films by Electrochemical Deposition Technology

作　　者：焦志峰[1] 王欢[1] 杨婉君[1] 余萍[1] 胡国兵[1] 刘洋[1] 肖定全[1] 

机构地区：[1]四川大学材料科学系,成都610064

出　　处：《四川大学学报（自然科学版）》2005年第S1期457-461,共5页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金重大国际合作项目(50410179);国家自然科学基金面上项目(50372042);霍英东青年教师基金(94008)

摘　　要：作者采用恒电流技术,室温条件下直接在金属钼片上制备了白钨矿结构的BaxCa1-xMoO4固溶体厚膜和BaMoO4单组分厚膜,采用X射线衍射、扫描电子显微镜等手段对薄膜进行了分析表征,详细研究了溶液成分对BaxCa1-xMoO4厚膜的形貌及其晶格常数的影响.分析结果显示所制的BaxCa1-xMoO4(0≤x≤1)固溶体陶瓷厚膜为四方晶系的单相膜,粒径随Ca2+/Ba2+的增大而增大,形貌也逐渐由CaMoO4逐渐过渡到BaMoO4,溶液中Ba2+含量为0.2(阳离子原子百分比)时,膜的形貌为呈明显的四方锥体,晶格结构为BaMoO4结构.溶液中BaxCa1-xMoO4厚膜的生长先是Ca原子掺入到BaMoO4中,晶格结构接近BaMoO4的晶格结构.分析晶胞参数表明,Ca2+并不是随机取代Ba2+,而是沿c轴优先取代Ba2+.Firstly, crystallized ceramic thickfilms (including CaMoO_4,BaMoO_4 and Ba_xCa_ 1-x MoO_4 (0≤x≤1)) were prepared directly on molybdenum substrate by electrochemical deposition technique of constant direct current at room temperature. Secondly, X-ray diffraction (XRD) was employed to investigate the crystalline structure of the films, and SEM was used to investigate the surface morphology of Ba_xCa_ 1-x MoO_4 thick films. The results show that when the concentration of Ba 2+ in the solution was below 0.3 (at...

关 键 词：电化学沉积 BaxCa_(1-x)MoO_4 陶瓷厚膜 

分 类 号：TB34[一般工业技术—材料科学与工程]