High-Purity Alumina
High-Purity Alumina (HPA, Al2O3, CAS 1344-28-1), 4N and 5N grades, supplied wholesale by Zyntex. For sapphire and LED substrates, lithium-ion battery separator coatings, semiconductors and advanced ceramics. CoA and SDS.
Description
High-Purity Alumina Product Overview
High-purity alumina (Al2O3) is a white powder with at least 99.99% (4N) purity, produced by special chemical routes rather than the Bayer process used for standard alumina. It is mostly the very hard, stable alpha form.
In addition, sapphire crystal producers melt 4N–5N alumina to grow sapphire for LED substrates, watch glass and optical windows, and battery producers use fine HPA to coat separators, which improves thermal safety of lithium-ion cells. Similarly, semiconductor, phosphor and advanced ceramic producers use it in high-performance components, and polishing slurry producers use it for precision polishing.
Notably, particle size, surface area and impurity profile define grades. Related materials in our range include Yttria-Stabilized Zirconia (YSZ), Aluminum Hydroxide and Silicon Carbide.
Key Applications of High-Purity Alumina
Typical uses include, for example:
💡 Sapphire and LEDs
Crystal growth feedstock.
🔋 Battery Separators
Ceramic coatings.
💻 Semiconductors
High-purity components.
🔍 Polishing
Precision slurries.
High-Purity Alumina Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | High-Purity Alumina (HPA) |
| CAS Number | 1344-28-1 |
| Molecular Formula / Weight | Al2O3 / 101.96 g/mol |
| Purity | 99.99% (4N) – 99.999% (5N) |
| Phase | Mainly alpha |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Not classified as hazardous under GHS; fine dust may irritate the respiratory tract. Avoid dust formation and also wear dust protection. Store in tightly closed containers in a dry place. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Frequently Asked Questions
How does HPA differ from standard alumina?
It has 4N or higher purity and is made by special chemical routes for demanding uses.
Why is HPA used in battery separators?
Its ceramic coating improves the thermal stability and safety of lithium-ion cells.
How can I get a price and documents?
We supply flexible quantities, from small orders to large volumes, so you do not need to meet the high minimum orders of large producers. Please contact us with your required volume, and we will send a quotation together with the CoA and SDS.
