Home / Standards / GB/T 47404-2026 GB/T 47404-2026 Upcoming Monocrystalline silicon carbide 碳化硅单晶 Standard Type GBT ICS 29.045 CCS H83 Status 即将实施 Issue Date 2026-03-31 Implementation 2026-10-01 Responsible Dept 国家标准委 Drafting Unit N/A