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

含镧氧化膜镀膜方法的研制及表面分析和热分析表征

基本信息

批准号：
08555216
负责人：
FURUICHI Ryusaburo
金额：
$ 11.26万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

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

1. 超声波喷雾热解法制备（La, M ^U）（Cr, Mn） O_<3- δ > [M ^U=Ca， Sr]氧化膜，制备（La, M ^U）（Cr, Mn） O_<3-zeta> [M ^U=Ca。在衬底上形成了Sr]氧化物薄膜。这种技术允许控制薄膜的厚度和成分。Ca和Mn的取代导致了电导率的增加，而sr的取代则降低了电导率。氧化钛和氧化钨混合氧化膜的光电化学行为：在1073和1173K的温度下，通过氧化沉积在钛板上的W，在钛板上形成TiO2-W03薄膜。电化学电流随w含量和氧化温度的增加而增大。这种增加是由于膜中W在深度方向上的均匀分布。43o型不锈钢在高温初始阶段的氧化行为：不锈钢是近年来应用较多的高温结构材料。然而，意外的快速氧化…More，即所谓的“脱离氧化”，导致使用困难。从SEM、XPS和XRD的研究中发现，分离氧化取决于氧化初期形成的氧化保护膜的性能，其性能由合金成分、氧压和高温加热速率决定。用两步阳极氧化法在铝表面形成耐腐蚀氧化膜：两步阳极氧化，1。用铬/磷酸盐溶液和II处理。在硫酸溶液中阳极氧化，形成含有Cr （III）和磷酸盐离子的多孔复合氧化膜。这种薄膜的耐蚀性和硬度都有所提高。金属氧化物颗粒表面羟基位的酸碱性质：金属氧化物表面的氧化离子被氢化形成酸氢氧化物和碱氢氧化物。建立了评价AI_2O_3、Fe_2O_3、Fe_2O_4、TiO_2和MnO_2表面氢氧化物密度的方法。在建立酸碱氢氧化物解离反应模型的基础上，确定了氢氧化物的解离常数，解释了Li、Na、K、Cs、Ni、Zn、Co、Mn、Cu和Pb离子的离子交换行为。少