PACE Technologies NA-1005-64 NANOMETER 0.05 um Polycrystalline Alpha Alumina Polishing Slurry - pH 10 (1/2 Gallon)

Polycrystalline or nanometer alumina is a colloidal alumina manufactured by a proprietary process. Polycrystalline abrasives are milled at either a low or higher pH value in order to avoid agglomeration which occurs near the point of zero charge (PZC). For alumina the PZC is around pH 7. This processing offers two significant improvements over conventional calcined alumina processes:

• Tighter, more controlled particle size distributions
• Harder alpha alumina crystal structure

A tighter, more controlled particle size distribution is the result of less particle aggregation. For example, standard calcined 0.05 micron gamma alumina products form aggregate sizes as large as 5 microns. In some cases, these aggregates can be broken down during polishing with harder specimens; however, they are a problem when polishing softer metals (such as aluminum, tin, lead, copper and soft steels) with calcined alumina abrasives.

Nanometer polycrystalline alumina is specifically milled to produce a much smaller aggregate particle size distribution (<0.5 micron). Polycrystalline alumina is also a harder alpha alumina particle, therefore making it a more efficient cutting abrasive. Thus, polycrystalline alumina is a much more controlled polishing abrasive as compared to calcined gamma alumina abrasives.

In general, the more modern polycrystalline alumina abrasives outperform traditional calcined and levigated alumina abrasives for final polishing because they produce a much more consistent and better surface finish.

Features:

• Improved surface finishes over gamma alumina
• Less random scratching
• Higher cutting rates than gamma alumina
• More uniform surface finish
• Tighter particle size distributions than gamma alumina
• Low viscosity for easier dispensing
• Semi-permanent suspensions