GB/T 13219-2018
Scandium oxide (English Version)
- Standard No.
- GB/T 13219-2018
- Language
- Chinese, Available in English version
- Release Date
- 2018
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 13219-2018
- Replace
- GB/T 13219-2010
- Introduction
Key points of the revision of the national standard for scandium oxide
Dimensions of revision 2010 version of the standard 2018 version of the standard Technical significance Grade system Undefined classification Five new grades: 5N5/5N/4N/3N5/3N Achieve precise classification of Sc2O3 purity Purity characterization Relative purity (Sc2O3/REO) Add absolute purity calculation formula 100%-(Σrare earth impurities +Σnon-rare earth impurities) Impurity assessment 15 kinds of rare earth elements Add ThO2 index Strengthen the safety of nuclear material application
Analysis of key technical indicators
Comparison of typical grades requirements
Grade Sc2O3 purity Key impurity limit (ppm) Absolute purity Relative purity Sc2O3-5N5 ≥99.9995% ≥99.99% Fe≤5, Cu≤5, Th≤5 Sc2O3-3N ≥99.9% ≥99.0% Fe≤200, Cu≤100, Th≤300 Note:5N5 grade products must meet 23 impurity indicators such as SiO2≤15ppm, Al2O3≤5ppm, etc.
Innovative points of detection method
- ICP-MS method: Newly added 0.00003%-0.01% ultra-trace detection, using cesium internal standard correction
- Absolute purity calculation: Introduce the difference subtraction formula to avoid REO measurement error
- Moisture control: Strictly implement 105℃ drying for 2h pretreatment
Implementation suggestions
Key links in quality control
- Raw material selection: It is recommended to use intermediates prepared by ion exchange method
- Process monitoring: Each batch needs to be tested for loss on ignition (≤1.0%)
- Packing specifications: Double-layer plastic bag + moisture-proof iron barrel, net weight divided into three levels of 0.1kg/1kg/10kg
Application areas of standard
Application industry Recommended grade Key indicators Solid-state laser Grade 5N5 Fe≤0.5ppm Nuclear fuel additive Grade 4N ThO2≤50ppm
Background of technological evolution
The revision of this standard responds to the demand for high-purity scandium oxide in emerging fields such as aerospace, quantum computing, etc. Compared with the 1991 version, the 2018 version:
- The detection limit is reduced by 100 times (from 0.01% to 0.00003%)
- The number of impurity elements is expanded from 12 to 23
- The GB/T 17803 brand designation standard is introduced
GB/T 13219-2018 Referenced Document
- GB/T 12690.2 Chemical analysis methods for nonrare earth impurity of rare earth metals and their oxides—Part 2: Determination of ignition loss content of rare earth oxides—Gravimetric method
- GB/T 12690.3 Chemical analysis of non-rare earth impurities in rare earth metals and their oxides - Part 3: Determination of water content in rare earth oxides - Gravimetric method
- GB/T 17803 Designation system for rare earth products
- GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 13219-2018 history
- 2018 GB/T 13219-2018 Scandium oxide
- 2011 GB/T 13219-2010 Scandium oxide
- 1991 GB/T 13219-1991 Scandium oxide
