Preparation of Flexible Graphite Sheet with Fine Flake Graphite

摘要：

Flexible graphite was prepared using the fine flake graphite that could go straight through 149-85μm mesh as raw material, using sulfate acid and nitrate acid as inserting agent and Potassium permanganate as oxidant. The best oxidation reaction conditions are as follows: Vsuifate acid/VNitrate acid=5:1, m (fine graphite)/m (Potassium permanganate)=l/0.12, the limited temperature is about 1100-1200℃. Under such condition, the expansion volume of the fine flake graphite with 250-149um can be reached to 341ml/g. The graphite with 149-85 μrn can be reached to 230ml/g, the qualities of flexible graphite sheet when intensity is 1.20 g/cm3 are as follows: tensile strength is 4.09 Mpa; ash ratio is 2.19％; recovery rate is 7.8％; compression ratio is 44.0％, TG at 450℃ is 0.32％; TG at 600℃ is 18.97％; Stress relaxation rate is 3.1％.

关键词： flexible graphite expansion factors

作者: Qi Lai

作者单位: Panzhihua University, Panzhihua, Sicuan, China. 617000

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)

会议地点: 广州

会议语种:英文

页码: 1642-1645

在线出版日期: 2011-11-18（万方平台首次上网日期，不代表论文的发表时间）