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| International Standard Category: Aluminium and aluminium alloys |
GB/T 34213-2017 High purity alumina for sapphire substrate
蓝宝石衬底用高纯氧化铝 ;
| Category No.: | 77.120.10 | Valid Status: | superseded |
| Issued Organization: | AQSIQ; SAC | Issued Date: | 2017-09-07 |
| Implemented Date: | 2018-6-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 34213-2023 High purity alumina for sapphire single crystal |
Superseded Date: | 2024-3-1 |
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