天然鳞片石墨氟盐固相法提纯工艺研究  

Study on the purification of flake graphite by the solid-phase method

作　　者：黄舰 白俊哲 张煜 罗大伟[1] Huang Jian;Bai Jun-zhe;Zhang Yu;Luo Da-wei(College of Materials,Chemistry&Chemical Engineering,Chengdu University of Technology,Sichuan Chengdu 610059,China)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059

出　　处：《炭素技术》2022年第2期67-70,共4页Carbon Techniques

基　　金：中国博士后科学基金面上项目(2017M612926)。

摘　　要：采用氟化氢铵作为除杂介质,固相法提纯天然鳞片石墨,探究不同条件对提纯效果的影响,并对样品结构性能进行XRF、XRD、SEM表征。研究结果表明,最佳工艺条件:m(NH_(4)HF_(2))∶m(C)=1∶10、反应温度130℃、反应时间10 h。其中主要杂质Si去除效率为94.90%、Fe为87.90%、Al为87.24%、K为85.21%,鳞片石墨纯度从94.49%提升到98.67%,鳞片保持完整,为高纯石墨的制备提供一种全新的思路。In this paper,with ammonium bifluoride as the impurity removal medium,solid-phase method is used to purify natural flake graphite to explore the effect of different conditions on purification.And the structures of samples are analyzed by XRF,XRD and SEM.The result shows that the optimal process condition is m(NH_(4)HF_(2))∶m(C)of 1∶10,reaction temperature of 130℃and reaction time of 10 hours.The removal efficiency of the main impurities of Si,Fe,Al and K are 94.90%,87.90%,87.24%and 85.21%respectively.The content of fixed carbon of flake graphite is increased from 94.49%to 98.67%and flakes remain intact,which provides a new way for the production of high purity graphite.

关 键 词：鳞片石墨 固相法 提纯 

分 类 号：P619.252[天文地球—矿床学] TQ420.6[天文地球—地质学]