国家/地区 中国（2）
IPC部 C（2）
IPC大类 C01（2）
IPC小类 C01B（2）
IPC C01B032/19（2）
发明人 ZHANG M（2）
公开年 2021（2）
申请年
专利权人

Improved preparation process of sulfonated graphene comprises condensing and refluxing concentrated sulfuric acid, adding e.g. graphite powder, adding pre-oxidized product, adding hydrogen peroxide, ultrasonically processing and drying.

ZHANG J, LAN Q, ZHANG H, XU H, ZHANG M

Preparation of powder metallurgy friction materials involves preparing graphene-nano-silica hybrid material, ball milling, mixing with e.g. iron powder, adding kerosene, compressing, fixing on supporting steel back, sintering, and cooling.

WANG Z, LI J, MIAO P, GAO F, LIU Z, CAI G, ZHANG M, GUO G