• 专利标题:   Preparation of in-situ self-generated graphene/copper composite material with composite interface structure, used for e.g. large-scale integrated circuit lead, comprises heating raw material copper in air, soaking in formic acid, drying, and heating and carbonizing treatment.
  • 专利号:   CN114645149-A, CN114645149-B
  • 发明人:   ZHANG L, SHENG J, WANG L, FEI W
  • 专利权人:   HARBIN INST TECHNOLOGY
  • 国际专利分类:   B22F001/102, B22F001/142, B22F001/17, B22F003/14, B22F003/18, C01B032/184, C22C001/05, C22C009/00, H01B001/02, H01B013/00
  • 专利详细信息:   CN114645149-A 21 Jun 2022 C22C-001/05 202282 Chinese
  • 申请详细信息:   CN114645149-A CN10281406 21 Mar 2022
  • 优先权号:   CN10281406

▎ 摘  要

NOVELTY - Preparation of in-situ self-generated graphene/copper composite material with composite interface structure, involves heating a raw material copper and oxidizing in air, soaking in formic acid, oven-drying, heating, carbonizing and spark-plasma-sintering. USE - Preparation of in-situ self-generated graphene/copper composite material with composite interface structure (claimed) used for large-scale integrated circuit lead frame, electrical engineering application including switch contact bridge, high-speed rail application and contact development of modern industry. ADVANTAGE - The method is simple, and easy to control the size of the raw material copper powder and oxidation time/temperature parameter, and obtains the copper formate coating with different thickness in the subsequent process, and after the pyrolysis to obtain copper particle bimodal distribution of different sizes. It solves the problem of uniformly graphene in the copper base component by oxidizing in air, acidifying with formic acid, coating the copper powder particles surface layer with a layer of sub-micron size copper particles and heat-treating due to the pyrolysis of the copper particles.