Home / Standards / GB/T 45974-2025 GB/T 45974-2025 Active Fine ceramics—Method for determination of grain size and size distribution 精细陶瓷 晶粒尺寸和尺寸分布的测定方法 Standard Type GBT ICS 81.060.30 CCS Q30 Status 现行 Issue Date 2025-08-01 Implementation 2026-02-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A