Development of Coating Method of the Oxide Films Containing Lanthanum and the Characterization by Surface Analysis and Thermal Analysis

1.用超声喷雾热解法制备了(La，M^U)(Cr，Mn)O_&lt；3-Delta&Gt；[M^U=Ca，Sr]氧化物薄膜，(La，M^U)(Cr，Mn)O_&lt；3-Zeta&gt；[M^U=Ca。在衬底上形成了氧化膜。这项技术允许控制薄膜的厚度和成分。钙和锰的替代导致电导率的增加，而锶的替代则导致电导率的降低。TiO2W03复合氧化膜的光电化学行为研究通过氧化沉积在钛板上的W，在1073K和1173K的温度下在钛板上形成了TiO2W03薄膜。光电化学电流随W含量和氧化温度的升高而增大。这是由于W在膜的深度方向上分布均匀。430型不锈钢在高温下的初期氧化行为：这种不锈钢是最近被用作高温结构材料的。然而，意外的快速氧化…更有所谓的“脱离氧化”，造成使用上的困难。通过扫描电子显微镜、X射线光电子能谱和X射线衍射仪研究发现，氧化剥离与氧化初期形成的保护性氧化膜的性质有关，而保护性氧化膜的性质与合金成分、氧压和高温升温速率有关。铝表面耐蚀氧化膜的两步阳极氧化工艺：一步铬/磷酸盐溶液处理，二步硫酸溶液阳极氧化，形成含铬(III)和磷酸离子的多孔复合氧化膜。该膜具有较高的耐腐蚀性和较高的硬度。金属氧化物粒子表面羟基中心的酸碱性质：金属氧化物表面的氧离子被氢化，形成酸碱氢氧化物。建立了评价Al_2O_3、Fe_2O_3、Fe_2O_4、TiO_2和MnO_2表面氢氧化物密度的方法。在模拟酸碱氢氧化物的离解反应的基础上，测定了这些氢氧化物的离解常数，并解释了Li、Na、K、Cs、Ni、Zn、Co、Mn、Cu和Pb离子的离子交换行为。较少

1. Preparation of (La, M ^U) (Cr, Mn) O_<3-delta> [M ^U=Ca, Sr] Oxide Films By the ultrasonic spray pyrolysis, thin (La, M ^U) (Cr, Mn) O_<3-zeta> [M ^U=Ca. Sr] oxide films were formed on substrates. This technique permitted to control film thickness and composition. The substitution of Ca and Mn resulted in an increase of electrical conductivity in contrast with a decrease by the Sr-substitution.2. The Photoelectrochemical Behavior of Mixed Oxide Films of Titanium Oxide and Tungsten Oxide : TiO2-W03 films were formed at 1073 and 1173K on Ti plate by oxidation of W deposited on the plate. The photoelectrochemical currents increased with the W-content and with the oxidation temperature. This increase was due to a homogeneous distribution of W in) depth direction in the film.3. Oxidation Behavior of Type43O Stainless Steel in the Initial Stage at High Temperatures : The stainless steels are recently used as the high temperature structural material. However, the accidental rapid oxidation … More , which is called as "Break Away Oxidation" occurs to result in a difficulty in use. From SEM, XPS and XRD studies, that Break Away Oxidation was found to depend on properties of the protective oxide film formed at the initial oxidation stage and the properties is determined by alloy composition, oxygen pressure and heating rate to high temperatures.4. Formation of Corrosion Resistant Oxide Films on Aluminum by a Two Step Anodizing Process : Two step anodizing, I .treatment with chromic/phosphate solution and II. anodizing in a sulphuric acid solution, forms porous composite oxide film containing Cr (III) and phosphate ion. This film showed an increasing corrosion resistance and hardness.5. Acid-Base Property of Surface Hydroxyl Sites of Metal Oxide Particles : The surface oxide ions on metal oxide are hydroxidized to form acid- and base-hydroxide. The method evaluating the surface hydroxide density was established for AI_2O_3, Fe_2O_3, Fe_2O_4, TiO_2, and MnO_2. On the basis of the modeling of dissociation reaction of the acid- and base-hydroxide, the dissociation constants of the hydroxides were determined and ion exchange behavior of Li, Na, K,Cs, Ni, Zn, Co, Mn, Cu, and Pb ions was explained. Less