News and Announcements
Altech Company Presentation – ASX Spotlight Series Asia
- Published October 26, 2016 10:42AM UTC
- Publisher Wholesale Investor
- Categories Company Updates
25th October 2016, ASX Announcement
Sapphire Gemstone
- Sapphire & Ruby
- Natural form of high purity alumina (HPA)
- Formed by mother nature like diamonds
- Colour from impurities
- Nearly as hard as diamond (Moh 9)
What’s HPA?
- Purified alumina
- Greater than 99.99% (4N) purity
- Smelter Grade Alumina (SGA) ~ 99.5% (5,000 ppm impurities mainly sodium)
- Bayer Process uses sodium hydroxide (NaOH)
- Sodium impurity is problem for electronics industry
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