Formation of Metal Film on Ceramics Surface by Using Oxy-sulfide Melts

氧硫化物熔体在陶瓷表面形成金属膜

• 批准号: 10450265
• 负责人: TAKEDA Yoichi
• 金额: $ 2.5万
• 依托单位: IWATE UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10450265/
• 关键词: Metalizing; Oxy-sulfide; Functional materials; Bonding; Wettability; Metal film; Ceramics; Alloy film; セラミック; 薄膜; 接着

Several bonding methods between ceramics and a metal substance have been developed and utilized for plates and packaging materials of electronic devices. We have great difficulty in bonding between non-metallic ceramics and metal. A metallic melt hardly floods on a ceramics surface for lack of wettability. Objective of the investigation is a development in making a homogeneous metal film fixing on ceramic surface through oxy-sulfide melt that spreads the surface. The oxy-sulfide is reduced by hydrogen gas and converted into metal film after spreading ceramics.Experiment for the investigation consists of two parts ; one is for making phase stability diagrams of the Fe-S-O oxy-sulfide system to know the melting temperature and the decomposition condition, the other is forming of the metal film and observing the binding structure. The suitable composition of 24 % S-9 % O-67 % Fe has been chosen from the phase stability diagrams and employed to making the metal film. The oxy-sulfide was melted and spread directly on the surface of alumina ceramics and then reduced to iron film, but sufficient binding strength between the metal and alumina was not reached. In order to get the strength alumina surface was initially covered with CaO-FeO-Fe_2O_3 melt that reacted with alumina and then the oxy-sulfide was spread. After hydrogen reduction of the double layers, the forming iron film was firmly fixed. Thickness of the metal film depends on amount of oxy-sulfide, temperature and time of spreading the oxy-sulfide on ceramic surface. Alloy film of 20 % Ni-80 % Fe having oxidation resistance was also made from the Ni-Fe-S-O oxy-sulfide in this method.

陶瓷和金属材料之间的几种粘接方法已经被开发出来，并被用于电子设备的板和封装材料。非金属陶瓷与金属之间的粘接存在很大困难。由于缺乏润湿性，金属熔体几乎不会泛滥在陶瓷表面。本研究的目的是通过硫氧化物熔体在陶瓷表面铺展，在陶瓷表面形成均匀的金属膜。实验包括两部分：一是制作Fe-S-O-氧-硫化物体系的相稳定图，以了解熔融温度和分解条件；二是金属膜的形成和结合结构的观察。从相稳定图中选择了合适的成分为24%S-9%O-67%Fe，并将其用于制备金属薄膜。硫氧化物熔融后直接在氧化铝陶瓷表面铺展，然后还原成铁膜，但金属与氧化铝之间没有达到足够的结合强度。为了获得强度，首先在氧化铝表面覆盖CaO-FeO-Fe_2O_3熔体，再与Al_2O_3反应，然后铺开硫氧化物。在双层氢还原后，形成的铁膜被牢固地固定。金属膜的厚度取决于氧化硫化物的量、在陶瓷表面扩散的温度和时间。该方法还以Ni-Fe-S-O硫化物为原料制备了20%Ni-80%Fe的抗氧化性合金膜。