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. 制备(La,M^U)(Cr,Mn)O_<3-δ>[M^U=Ca,Sr]氧化膜采用超声波喷雾热解法，薄(La,M^U)(Cr, Mn)O_<3-zeta>[M^U=Ca]氧化物膜在基底上形成，该技术允许控制膜厚度和成分。电导率的增加与Sr取代的降低相反。2．氧化钛和氧化钨混合氧化物薄膜的光电化学行为：通过沉积W的氧化，在1073和1173K下在Ti板上形成TiO2-W03薄膜。板上的光电化学电流随着W含量和氧化温度的增加而增加。 3. 43O 型不锈钢在高温初始阶段的氧化行为：不锈钢最近被用作高温结构材料，但意外的快速氧化... 更多由于“脱离氧化”的发生导致使用困难，从SEM、XPS和XRD研究发现，脱离氧化取决于保护氧化膜的性质。在初始氧化阶段形成，其性能由合金成分、氧气压力和高温加热速率决定。通过两步阳极氧化工艺在铝上形成耐腐蚀氧化膜：两步阳极氧化，I.铬处理。 /磷酸盐溶液和II.在硫酸溶液中阳极氧化，形成含有Cr(III)和磷酸根离子的多孔复合氧化物膜，该膜显示出增加的耐腐蚀性和。 5、金属氧化物颗粒表面羟基位点的酸碱性质：金属氧化物表面氧离子被羟基化形成酸碱氢氧化物，建立了Al_2O_3、Fe_2O_3、Fe_2O_4表面氢氧化物密度的评价方法。、TiO_2 和 MnO_2 在酸碱氢氧化物解离反应的模拟基础上，测定了氢氧化物的解离常数，并解释了 Li、Na、K、Cs、Ni、Zn、Co、Mn、Cu 和 Pb 离子的离子交换行为。