How Diamond Powder Particle Size Distribution Affects Polishing Results

Particle size distribution is one of the most overlooked specifications when purchasing diamond powder, yet it has a direct impact on surface finish, removal rate and process consistency. Two powders with the same nominal size can behave very differently if the distribution is tight in one case and wide in the other. Henan Famous Diamond Co., Ltd. recommends that buyers always review distribution data, not just the average size.

A narrow distribution produces a uniform scratch pattern and predictable finishing results, which is essential for optical components, precision ceramics and semiconductor related work. A wider distribution removes material faster because the larger particles do more cutting, but it also leaves occasional deeper scratches that require additional polishing steps. For rough lapping stages a wider grade is often more economical, while final polishing should always use a tightly graded powder with clearly stated upper and lower limits.

Other factors must be considered together with size: particle shape influences cutting behavior and surface roughness, blocky particles tend to give more consistent removal while irregular shapes can cut faster but scratch more; the suspension or carrier used must keep the powder well dispersed to avoid agglomeration, since agglomerates behave like oversized particles. Buyers should request a certificate of analysis for each lot, run a small trial before full production, and keep lot numbers recorded for traceability. Henan Famous Diamond Co., Ltd. supplies diamond powder, micron powder and related superabrasive products with full specification support.