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

本课题旨在开发离子导体、保护层、超导体等高性能材料的溶液制备工艺。主要取得了以下成果：1.提高工作效率；以金属硝酸盐水溶液为原料，采用喷雾热解法制备了高温超导粒子。正交YBa_2Cu_3O_<7-x>粒子和Bi_2Ca_1Sr_2CU_2O_X粒子分别在1000和800℃左右直接形成。用烷醇胺稳定相应的金属醇氧化物制备了YBa_2CU_37_<7-X>和Bi_2Ca_2Sr_2Cu_3O_X超导薄膜；这些薄膜分别在90K和86K时显示Tc（零）。3 .镀膜气氛的控制对B_2O_3-SiO_2和MO-B_2O_3-SiO_2（M=Zn或Mg）钝化玻璃膜的制备具有重要意义。在钢板表面涂覆ZrO_2和SiO_2薄膜，可有效提高钢板的耐热性和耐候性。研究还表明，在这些薄膜中掺入氟和甲基，可提高薄膜的拒水性和伸长率。开发了一种利用含聚乙二醇凝胶膜在亚微米范围内形成精细图案的新工艺。采用溶胶-凝胶法制备了含有高达40% H_3PMo_<l2 bbb_ O_<40>. 29h_2o的SiO_2薄膜。这些薄膜显示出电阻率对湿度的对数线性响应，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.