Studies on Production and Characterization of Functional Material Utilizing Controlled Surface Reaction

1. 通过对MNO_3 （M^+: Li^+， Na^+和K^+）和Zn (NO_3)_2（添加或不添加EMD粉末）溶液的电位滴定曲线，以及含MNO_3的肼水溶液逐步还原氧化锰（EMD）的过程，评价了电解二氧化锰（EMD）的电化学性能（孔隙率、晶体结构）。开发了一种制备性能优良的碱性电池正极材料EMD的新方法。采用含有α - al_2o_3、TiO_2和BaSO_4粉末的酸性硫酸铜和硫酸锌浴，研究了电镀过程中微溶粒子共沉积的影响因素。提出了CU^<2+>和Zn^<2+>在粒子表面的化学结合是粒子在镀层中沉积所必需的共沉积机制。钠-石灰-硅玻璃的应力腐蚀与电解质的浓度、性质和溶液ph均有关。化学反应产生的二价阳离子（特别是Zn^<2+>）与玻璃的强相互作用抑制了玻璃的应力腐蚀。本文对莫来石和铁氧体作为复合氧化物进行了表面化学研究，目的是将研究结果应用于制备由两种金属氧化物组成的复合氧化物。

1. Electrochemical properties (porosity, crystal structure) of electrolytic manganese dioxide (EMD) was found to be evaluated from the potentiometric titration carves obtained for solutions of MNO_3 (M^+ : Li^+, Na^+ and K^+) and Zn (NO_3)_2 with or without EMD powder, and the process of stepwise reduction of the oxide by aqueous hydrazine solution containing MNO_3. A new method for preparation of EMD having excellent characteristics as a positive material for alkaline battery has been developed.2. Factors affecting the codeposition of sparingly soluble particles during electroplating was investigated using acidic copper sulfate and zinc sulfate baths containing alpha-Al_2O_3, TiO_2 and BaSO_4 powders. Such a mechanism on the codeposition that existence of chemically bound CU^<2+> and Zn^<2+> at the particle surface is essential for the particles to be deposited in the metals plated has been proposed.3. Stress corrosion of soda-lime-silica glass was found to depend on both the concentration and the nature of the electrolytes and solution pH. Strong interaction between the glass and divalent cations (especially Zn^<2+>) brought about by chemical reactions resulted in inhibition of stress corrosion of the glass.4. Mullite and ferrite as a complex oxide was surface-chemically investigated in order to apply the results to well difined and controlled preparation of a complex oxide consisting of two kinds of metal oxides.