High-Purity Alumina Optimized For Consistent, Defect-Free Sapphire Growth

Our high-purity alumina supports the production of synthetic sapphire used in optical, electronic, and protective applications. With tight control over impurities and morphology, we help manufacturers achieve exceptional clarity and consistent crystalline performance.

The challenge:
Even a Trace Impurity Becomes a Visible Defect

Sapphire components are used in environments where hardness, transparency, and durability are critical. To grow high-quality sapphire crystals, manufacturers need alumina with ultra-low impurity levels and consistent particle characteristics.

How We Help:
Minimizing Defects Starts with Maximizing Purity

We overcome these challenges by supplying 4N and 5N ultra-high purity alumina with exceptional chemical cleanliness, uniform particle size, and controlled morphology—all tailored for sapphire growth. Our ultra-high-purity alumina is engineered to minimize defects, enable consistent melt behavior, and support high-yield, high-clarity crystal production for applications like LEDs, optics, and semiconductor substrates.

Related Products

Alumina for crystal growth and sapphire production.

Alumina for crystal growth and sapphire production.

Pure Precision. Proven Performance.

We make alumina that enables defect-free sapphire growth and superior component performance.

Ultra-Low Contamination

Helps reduce defects and enhance crystal clarity.

Controlled Morphology

Supports uniform melt behavior and growth conditions.

Trusted Traceability

Each batch documented for consistency and qualification.

The Processes We Protect

Our materials enable sapphire production that meets the highest purity, strength, and clarity

Traceable By Design

In regulated environments, data matters. We retain physical samples and link every batch to detailed records, including validated test methods. That means you can access the exact specs and purity values you need, whether it’s for audit documentation or product validation months down the line.

Frequently Asked Questions

A: Sapphire is typically produced by melting high-purity alumina and forming single crystals through methods such as the Verneuil or Kyropoulos process. Purity and consistency of the starting powder are essential to achieve defect-free crystals.

A: We offer alumina powders at 4N and 5N purities with documentation to support crystal growth qualification requirements.

A: Yes. We offer custom and standard PSDs with morphology options to match your crystal growth system or sapphire application.

A: All POLARGuard™ materials are processed in Oakville, Canada for reliable logistics and consistent batch control.