Alumina Powder

Formulated for the same final polishing step as these brand products:

•
Buehler — MicroPolish / MicroPolish II

•
Struers — alumina suspension

•
Allied High Tech — alumina suspension

Runs on Buehler, Struers, LECO, Allied, and PACE systems with no change to your process. It is a comparable product for the same step — not a branded or drop-in item.

Same grading and micron sizing, typically 20–40% less.

Request a free sample and test it on your own bench.

Alumina Powder

What This Product Is

Alumina powder is dry, high-purity calcined aluminum oxide (Al₂O₃) supplied in graded particle sizes for metallographic polishing and lapping. It is the same abrasive as our alumina suspension, in dry form, so a lab can mix its own slurry to the concentration it prefers and buy in bulk for a lower cost per use.

Graded options include the classic Linde grades — Linde A (0.3 µm, alpha) , Linde B (0.05 µm, gamma) , and Linde C (1.0 µm) — alongside coarser micron sizes for lapping.

Intended Use in Metallography

Alumina powder is used to prepare polishing or lapping slurries for intermediate and final steps. It is commonly selected when:

• A lab wants to control slurry concentration itself

• Bulk purchasing is more economical than ready-made suspension

• Coarser alumina grades are needed for lapping operations

• A specific water or lubricant carrier is preferred

Typical Applications

Commonly used for:

• Mixing custom alumina polishing slurries