Preparation of Functional Inorganic Materials by the Solution Process and Their Characterization

本研究项目是为了开发制备离子导体、保护层、超导体等高功能材料的溶液工艺。1.采用金属硝酸盐水溶液喷雾热解法制备了高T_c超导粒子。结果表明：1.在1000℃左右和800ﾟ℃左右，直接生成的YBa2Cu3O7-x和Bi2Ca1Sr2Cu2Ox颗粒均为正交晶系。用醇胺稳定相应的金属醇盐制备了YBa2Cu37&lt；7-X&gt；和Bi2Ca2Sr2Cu3OX超导薄膜，这两种薄膜分别在90K和86K显示零的T_c。镀膜气氛的控制对于制备B_2O_3-SiO_2和MO-B_2O_3-SiO_2(M=锌或镁)钝化玻璃薄膜是非常重要的。研究表明，在钢板表面涂覆氧化锆和二氧化硅薄膜，可以有效地提高钢板的耐热性和耐候性。研究还表明，氟和甲基的引入使薄膜具有憎水性和延伸性。利用含聚乙二醇的凝胶膜开发了一种在亚微米级形成精细图案的新工艺。用溶胶凝胶法制备的SiO_2薄膜中H_3PMo_&lt；L2&gt；O_&lt；40&gt；0.29H_2O含量高达40%。这些薄膜的电阻率对湿度的对数呈线性响应，表明这些薄膜适用于湿度传感器。

This research project has been carried out to develop the solution process for preparation of highly functional materials, such as ion-conductors, protective layers, superconductors, and so on. The following achievements have been done: 1. High-Tc superconducting particles have been prepared by the spray-pyrolysis, process using an aqueous solution of metal nitrates. Orthorhombic YBa_2Cu_3O_<7-x> particles and Bi_2Ca_1Sr_2CU_2O_X particles were directly formed at around 1000 and 800ﾟC, respectively.2. Superconducting YBa_2CU_37_<7-X> and Bi_2Ca_2Sr_2Cu_3O_X films have been prepared from corresponding metal-alkoxides stabilized with alkanol amines; these films show Tc(zero) at 90K and 86K, respectively.3. The control of the coating atmosphere has been found to be important for the preparation of passivation glass films of B_2O_3-SiO_2 ahd MO-B_2O_3-SiO_2(M=Zn, or Mg).4. The coating of ZrO_2 and SiO_2 films on steel sheets has been proved to be effective for improvement of heat-resistance and weather-resistance. It has also been shown that the incorporation of fluorine and methyl groups into these films brings about water-repellent and elongation properties.5. A novel process to form fine patterns in submicrons has been developed using polyethylene glycol-containing gel films.6. SiO_2 films containing up to 40% H_3PMo_<l2>O_<40>.29H_2O have been prepared by the sol-gel method. These films show a linear response of logarithm of resistivity to humidity, indicating that these films are applicable to a humidity sensor.