chromium oxide green (Cr₂O₃) has become a key abrasive in high-end precision polishing due to its unique hardness and chemical properties. Recent research demonstrates Cr₂O₃’s excellent performance in ultra-precision machining of hard and brittle materials like sapphire, silicon carbide, and silicon nitride.
Why Choose chromium oxide green as Abrasive?
Property Value polishing Advantage Mohs Hardness 8-8.5 Close to Si₃N₄, SiC hardness for precision grinding Chemical Stability Inert No harmful reactions with workpiece Particle Morphology Controllable Sub-micron to nano-scale sizes available thermal stability 1000°C+ Grinding heat does not affect performance
Research Advances
Silicon Nitride Chemomechanical polishing: Research confirms Cr₂O₃ is an excellent abrasive for silicon nitride (Si₃N₄) workpieces. Since Cr₂O₃ hardness is nearly identical to Si₃N₄, atomic-level material removal can be achieved for ultra-smooth surfaces.
Self-sharpening Gel Abrasive Tools: A 2024 study published in the International Journal of Precision Engineering proposes a novel Cr₂O₃ gel abrasive tool. This tool achieves self-sharpening capability through coated aluminum nitride (AlN) powder, demonstrating excellent material removal rate and surface quality in sapphire substrate grinding.
Typical Applications
- Optical components: Precision polishing of lenses, prisms, optical windows
- semiconductor materials: CMP of SiC, GaN, sapphire wafers
- Advanced ceramics: Mirror grinding of ceramic bearings, ceramic tools
- Metal surface treatment: Premium polishing of stainless steel, titanium alloys
VerdeChrome® polishing Grade Products
VerdeChrome® Functional Oxide Series provides Cr₂O₃ products designed for polishing applications:
- Ultra-fine particle size (D50 down to 0.5μm)
- Narrow particle size distribution, reduced scratching
- High purity (≥99.5%), no impurity contamination
- Customized particle size solutions
Request polishing grade samples to evaluate VerdeChrome® performance in your applications.
