石墨细度试验方法 Test method for fineness of graphite  ICS  73.080 CCS  Q 51   中华人民共和国国家标准 GB/T 3520—2024 代替 GB/T 3520—2008 2024-10-2 6发布 2025-05-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     试样的采取和制备   ····················································································   1      4.1     试样的采取   ······················································································   1      4.2     试样的制备   ······················································································   2 5     试验方法   ······························································································   2      5.1     负压筛析法（测定范围：不小于38 μm)   ·························································   2      5.2     振筛机法（测定范围：不小于38 μm )   ···························································   3      5.3     激光衍射法（测定范围：不大于38 μm）   ·······················································   4 GB/T 3520—2024     Ⅰ