White aluminum oxide & Powder | YUMO New Material

White aluminum is a white synthetic corundum abrasive made from high-purity aluminum oxide, characterized by high hardness and high-temperature resistance. It is widely used in metal processing, ceramics, and precision casting industries for efficient grinding and polishing.

White aluminum oxide Grit

White aluminum oxide is a high-purity synthetic abrasive (Al₂O₃ ≥99.5%) in granular form, ideal for precision grinding wheels, sandblasting, and refractory linings due to its angular grains and thermal stability.

White aluminum oxide Powder

White aluminum oxide powder is a micron-grade (F240-F2000) abrasive material used for fine polishing, ceramic coatings, and semiconductor wafer processing, offering controlled particle size distribution and minimal contamination.

the photo of White Fused Alumina Micro Powder

Products Parameter

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Application

1. Aerospace Component Manufacturing

Rough Machining Phase:
White Aluminum Oxide (grit F16–F60) rapidly deburrs titanium alloy blade blanks and performs coarse surface grinding, achieving a material removal rate (MRR) ≥30 cm³/min.
Precision Finishing Phase:
White Aluminum Oxide Powder (grit F800–F2000) enables mirror polishing of turbine blades (Ra ≤0.1μm), meeting stringent aerodynamic requirements.

2. Semiconductor Wafer & Optical Component Production

Substrate Shaping:
Granular White Aluminum Oxide (F120–F220) pre-grinds sapphire substrates to control thickness tolerance (±5μm).
Ultra-Precision Polishing:
Ultra-fine powder (D50=2–5μm) paired with Chemical Mechanical Polishing (CMP) slurry eliminates subsurface damage (SSD <10nm).

3. High-End Refractories & Ceramic Coatings

Refractory Aggregates:
Granular form (1–3 mm) serves as arc furnace lining aggregates, resisting thermal erosion at 1800°C.
Coating Reinforcement:
Powder (purity ≥99.8%) is plasma-sprayed to create wear-resistant ceramic coatings (thickness 50–200μm, bond strength ≥50 MPa).

Technical Synergy Comparison

Processing Efficiency:

Granular: Improves rough grinding efficiency by 40%.
Powder: Reduces precision polishing cycles by 30%.

Surface Quality:

Granular: Achieves Ra 1.6–6.3μm.
Powder: Delivers Ra 0.025–0.1μm.

Cost Optimization:

Granular: Lowers tool wear rates.
Powder: Minimizes polishing media consumption.

Industry Case Study: EV Motor Shaft Processing

Step 1: Coarse grinding with F36 granular wheels removes oxide layers (Ra 3.2μm).
Step 2: Precision polishing with F1500 powder belts creates ultra-smooth friction surfaces (Ra 0.05μm), reducing motor noise by 12dB.

Selection Guidelines

Heavy Industries (Steel, Foundry): Prioritize granular form (80% usage), with powder for localized repairs.
High-Precision Sectors (Semiconductors, Medical): Use powder for 70% of processes, reserving granular for pre-treatment.