Preparation method of high-oxide content flake-like contact material

• Main Authors: MIAO RENLIANG, BAI XIAOPING, WAN DAI, LU XIANGFEN, WENG WEI, LIN WANHUAN, LIU LIQIANG, XIA CHENGDONG
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a preparation method of a high-oxide content flake-like contact material. The preparation method is suitable for two types of materials comprising a silver-cadmium oxide alloy material and a silver-tin oxide-indium oxide material. The silver-cadmium oxide alloy material comprises, by weight, 75-82% of silver, 15-22% of cadmium oxide, 0-5.5% of copper oxide, 0.1-0.3% of nickel oxide and a trace amount of other oxides. The silver-tin oxide-indium oxide material comprises, by weight, 78-85% of silver, 11-17% of tin oxide, 3-8% of nickel oxide, 0.05-0.25% of nickel oxide and a trace amount of other oxides. The preparation method comprises melting, extrusion, compound silver hot rolling, cold rolling, punching, high-temperature diffusion annealing, internal oxidation treatment and aftertreatment. The prepared high-oxide content flake-like contact material has high oxide content and high compound silver interface bonding strength, has simple production processes and is suitable for large batch production.