作　　者： ; ; ; ;

机构地区： 深圳大学化学与化工学院

出　　处： 《材料工程》 2008年第5期29-33,38,共6页

摘　　要： 在尿素-NaBr-KBr-甲酰胺体系中用工艺设备简单、成本低的电沉积方法制备Bi2Sb3Lax合金薄膜。通过EDS对电沉积薄膜的组成进行了研究,结果表明:采用控电位沉积模式,可实现铋、锑、镧三元共沉积,生成Bi2Sb3Lax合金薄膜。通过调节沉积液中各物质的配比控制Bi2Sb3Lax合金薄膜的稀土La填充量,稀土元素La的最大填充量为4.61%(原子分数)。电沉积时间和电流密度对合金薄膜形态有影响,SEM观察沉积薄膜在电流密度为2000 A.m-2,电沉积时间为90s时表面分布均匀。沉积膜涂覆聚乙烯醇膜后进行XRD分析,图谱显示所得到的沉积物是由菱形BiSb和六方结构的单质La组成。探索了La的填充量对Bi2Sb3Lax合金薄膜电性能的影响。 Bi-Sb semiconductor alloys were excellent thermoelectric and magnetic material and important for the pieces of solid-state refrigeration device, thermoelectric generator, electrical and magnetic materials. Electrochemical deposition thin film technique was simple and low cost. The process of producing Bi2Sb3Lax alloy thin film under electrodepositional in nonaqueous system was studied. It did research the ratio of solution and the electrodeposition time and the current strength to the alloy thin film form. Then finally figure out the best conditions for electrodeposition. The EDS analysis showed that the Bi-Sb alloy film＇s ratio was 2 ： 3. The alloy film was proved the surface was uniform formation by SEM text. XRD proved the alloy film was made up of BiSbLa crystal. Electricity property of Bi2Sb3Lax alloy film＇s La loading was explored.

关 键 词： 电沉积 稀土元素 热电材料 非水体系 电性能

领　　域： [理学] [理学] [一般工业技术]