Brown Fused Alumina Micropowder Applications
Brown fused alumina (BFA) micropowder features high toughness, Mohs hardness 8.5–9, stable chemical performance and free of free silica. the main applications as follows:
1. Precision Grinding & Polishing
–Metal Processing
- Deburring, fine grinding and mirror polishing for stainless steel, alloy steel, cast iron, hardware stampings, cutting tools, precision shafts, valve parts, 3C metal frames and mobile phone casings.
- Used to produce polishing paste, polishing liquid and grinding suspension for mass wet polishing of medical cutting tools and precision mechanical parts; low-iron grades avoid rust spots on workpieces.
–Non-metallic Finishing
Fine grinding and scratch removal for glass, ceramic tile, sanitary ware, jade, stone and carbon fiber composites.
–Electronics & Photovoltaics
- PCB surface roughening, rough grinding of silicon wafers and SiC substrates; deburring lithium battery aluminum shells and electrode sheets.
- Ultra-fine finishing for optical lenses and ceramic electronic packaging components to achieve low surface roughness.
2. Blasting & Surface Pretreatment
Free of hazardous free silica, suitable for dry and wet blasting:
- Rust removal, oxide layer cleaning and matte finishing for steel structures, ships, aluminum & copper profiles.
- Clear carbon deposits and release agent residues on casting and die-casting molds to restore dimensional accuracy.
- Form uniform matte texture on hardware workpieces and improve adhesion of paints, coatings and electroplating layers.
- Anticorrosion pretreatment for bridges and construction machinery parts.
3. Raw Material for Bonded & Coated Abrasives
–Bonded Abrasives
Key aggregate for ceramic/resin grinding wheels, oil stones, mounted points and honing sticks. Ideal for heavy-duty metal cutting due to excellent toughness and low grain breakage rate.
–Coated Abrasives
Micron-grade raw material for sandpaper, emery cloth and abrasive belts for sheet & pipe grinding.
–Tumbling Media
Filler for vibratory and centrifugal polishing machines for mass finishing of small hardware parts.
4. High-Grade Refractory Materials
Refractoriness ≥2100°C, outstanding wear and thermal shock resistance:
- Aggregate for corundum castables, wear-resistant spray coatings and ramming mixes used in steel plants, industrial kilns and heat treatment furnaces.
- Additive for corundum refractory bricks, crucibles and kiln furniture to boost compressive strength and erosion resistance.
5. Investment Casting
For silica sol and water glass investment casting processes:
- Facing and intermediate layer slurry powder for mould shells, improving casting surface finish and reducing sand holes and burrs.
- Widely adopted in stainless steel, aluminum alloy and superalloy precision casting to guarantee high dimensional tolerance.
6. Electronic & Structural Ceramics
- Raw material for ceramic capacitors, insulating ceramics, high-voltage porcelain bases with superior insulation, heat resistance and mechanical strength.
- Fabrication of ceramic filters, wear-resistant ceramic liners and ceramic pump valve components.
7. Wear-resistant Filler & Protective Coatings
–Industrial Coatings
Additive for ship anti-corrosion paint, wear-resistant floor paint and heavy-duty bridge coatings to enhance surface hardness, scratch and abrasion resistance of film layers.
–Thermal Spray Powders
Ceramic protective coating feedstock for aero-engine blades and high-temperature components to resist abrasion and high-temperature oxidation.
–Composite Reinforcement Filler
Filling material for automobile brake pads, special rubber, wear-resistant floorings and artificial wear-resistant boards to stabilize friction performance and extend service life.