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

本研究课题旨在发展溶液法制备离子导体、保护层、超导体等高功能材料，取得了以下成果：1.本文采用喷雾热分解法，用金属硝酸盐水溶液制备了高温超导粒子。正交相YBa_2Cu_3O_2<7-x>和Bi_2Ca_1Sr_2Cu_2O_X分别在1000 ℃和800 ℃左右直接生成.用<7-X>烷醇胺稳定的相应金属醇盐制备了YBa_2Cu_37_和Bi_2Ca_2Sr_2Cu_3O_X超导薄膜，它们的Tc分别为90 K和86 K.在制备B_2O_3-SiO_2和MO-B_2 O_3-SiO_2（M=Zn或Mg）钝化玻璃膜时，控制镀膜气氛是重要的.在钢板表面镀上ZrO_2和SiO_2薄膜，可有效地提高钢板的耐热性和耐候性。它也已被证明，氟和甲基基团的结合到这些薄膜带来了防水和伸长性能。一种新的方法，以形成精细图案在亚微米已开发使用聚乙二醇含有凝胶薄膜。用<l2><40>溶胶-凝胶法制备了H_3PMo_ O_（29）H_2O含量高达40%的SiO_2薄膜。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.