用溶胶-凝胶（Sol-Gel）法制备了RE（RE=La，Y）-Mo复合氧化物粉末，工艺条件：初始溶液pH值=1，于550℃分解胶体，500℃，900℃2次还原粉末。采用XRD，TEM对还原后粉末的相组成、形貌、粒度进行分析。结果表明：500℃还原后，单质Mo衍射峰出现，RE以非晶态RE-O-Mo存在；900℃2次还原后，RE 以氧化物形式存在。红外光谱（FT-IR）分析结果表明，La和Y通过O与Mo键合，削弱Mo=O键，使稀土钼复合氧化物可还原性增强。TEM分析表明，还原后稀土钼粉末粒径在70nm左右。

The diffusion behavior of elements lanthanum and oxygen in Mo–La O cathode has been carried out by using Auger Electron 2 3 31 21 Spectroscopy. Lanthanum and oxygen ions (La and O) diffuse from the grain boundaries to the surface. The experimental results 31 were analyzed by kinetics of grain boundary diffusion. In the temperature range 1123 K-1423 K, the diffusion coefficients of La and21 O ions were found to fit with the following expression: 216 5 2 21 D 53.6703310 exp(21.01639310 /RT) m s La 216 4 2 21 D 51.5122310 exp(28.13066310 /RT) m s O

采用热分析，原位XPS等方法对Mo-La203阴极中La的价态进行了研究，探讨了陔阴极的发射机理实验结果表明，在高温下La203可以被M02C还原成单质La。La2O3-Mo阴极的发射可用原子膜机理解释：住阴极工作过程中，还原得到的La覆盖在Mo基体表面，降低了基体Mo的逸出功，促进了阴极的发射。根据此机理提出r La203-Mo电于管制备和运行工艺，使电子管的工作寿命提高到了满足实际应用要求的水平。

By selecting polycrystalline Ag as the substrates, highly c-axis(O01) textured YBCO films have been fabricated by using a modified magnetron sputtering equipment. Research on the textures of cold rolling Ag at different deformation degree and recrystallization textures of cold-rolling Ag at different temperature shows that in-plane alignment of YBCO film is difficult to obtain directly on cold rolling Ag substrates because of a series of change of textures in Ag during heating. The sharp recrystallization textures with cube (001)[010] and rotated cube(001)[012] in Ag have been developed. Experiments offer a possible prospect for the further study of fabricating sharp biaxially texture in Ag and the following deposition of high J YBCO films directly on it.

A single-component, 1104 211:, biaxially textured silver tape was obtained by cold-rolling and annealing. The cold-rolling textures and recrystallization textures of silver were studied systematically. It is shown that a sharp biaxial 1104 texture can be obtained by using higher total rolling reduction, lower reduction per pass and higher annealing temperature. In-plane aligned YBCO film was deposited directly by pulsed laserdeposition PLD. on a textured silver foil having 1104 211: orientation. The critical current density Jc value of 5=105 Arcm2 was obtained at 77 K, 0 T.