Atomfair Aluminum Oxide Polishing Powder

Product Overview

Atomfair Aluminum Oxide (Al₂O₃) Polishing Powder is a precision-engineered abrasive designed for high-performance surface finishing in global industrial and laboratory applications. Featuring controlled particle size distribution, exceptional hardness, and uniform grain morphology, this cost-effective solution delivers consistent, scratch-free results on diverse materials, making it a trusted choice for international manufacturing and research.

Ideal for polishing metals (steel, aluminum, alloys), ceramics, glass, and engineering plastics, it balances efficient material removal with ultra-smooth surface quality. Its versatility meets the demands of industries including optics, electronics, metallurgy, precision engineering, and automotive manufacturing worldwide.

Key Features

Superior Hardness: Mohs hardness 9.0 (ASTM E18-17a compliant), ensuring long-lasting abrasive performance and high wear resistance.
Uniform Grain Structure: Narrow particle size distribution (ISO 6344-2:2021 certified) for consistent polishing results and reduced rework.
High Purity: ≥99.9% Al₂O₃ content (ASTM F7-95(2021) standard), minimizing workpiece contamination.
α-Phase Crystal Structure: Provides excellent thermal stability (melting point ~2050 °C) and chemical inertness, suitable for harsh polishing environments.
Cost-Effective Versatility: Suitable for both small-batch laboratory R&D and large-scale industrial production, delivering reliable value across applications.

Technical Specifications

Parameter	Details
Chemical Composition	Aluminum Oxide (Al₂O₃), α-phase
Net Weight	500g per bottle (industrial-grade sealed packaging)
Particle Size Range	0.3, 0.5, 1, 2.5, 3.5, 7, 14, 20, 28, 40 microns (D50, FEPA compliant)
Purity	≥99.9% Al₂O₃ (trace impurities < 0.1%)
Hardness	Mohs 9.0 (equivalent to Vickers hardness ~2000 HV)
Bulk Density	1.75–1.95 g/cm³
Tap Density	≥3.90 g/cm³
Appearance	White, free-flowing powder
Packaging	Moisture-proof HDPE bottle with tamper-evident seal

International Standard Compliance

Particle Size: ISO 6344-2:2021 (Coated abrasives — Grain size distribution)
Chemical Purity: ASTM F7-95(2021) (Standard specification for aluminum oxide powder)
Hardness Testing: ASTM E18-17a (Standard test method for Rockwell hardness)
Environmental Safety: RoHS Directive 2011/65/EU and REACH Regulation (EC) No 1907/2006
Grain Classification: FEPA (European Abrasive Manufacturers Federation) standards

Application Guidelines

Particle Size Selection

Coarser sizes (14–40 microns): Initial material removal and shaping
Medium sizes (2.5–7 microns): Precision polishing and scratch reduction
Finer sizes (0.3–1 micron): Ultra-smooth finishing and mirror polishing

Optimal Use

Use with compatible polishing pads/tools and appropriate lubricants (deionized water recommended)
Maintain consistent pressure and speed to avoid surface damage
Gradually reduce particle size between polishing steps to eliminate scratches

Storage Conditions

Store in a cool, dry environment (relative humidity < 60%)
Keep the bottle tightly sealed after use to prevent moisture absorption
Shelf life: 24 months from the manufacturing date under proper storage

Safety & Compliance

This product complies with global safety standards for abrasives. For detailed safety information, refer to the Safety Data Sheet (SDS) supplied with each shipment. Always wear appropriate personal protective equipment (PPE) to avoid dust inhalation.

References

ASTM E18-17a: Standard Test Methods for Rockwell Hardness of Metallic Materials
ISO 6344-2:2021: Coated abrasives — Determination and designation of grain size distribution
ASTM F7-95(2021): Standard Specification for Aluminum Oxide Powder
α-Al₂O₃ Crystal Properties, Advanced Ceramic Materials (2025)
FEPA Abrasive Grain Classification Standards (2024)
REACH Regulation (EC) No 1907/2006 & RoHS Directive 2011/65/EU

For inquiries, questions, or custom specifications, please contact us at: inquiry@atomfair.com

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