Coated BFA (F-grit)

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As a professional supplier of abrasives and technical services, Alfa Chemistry offers coated brown fused alumina (BFA) F-grit, a high-performance abrasive engineered to elevate your grinding and cutting operations. It is a specially enhanced abrasive produced by meticulously encapsulating the surface of either medium-temperature or high-temperature calcined BFA F-grit. This proprietary process utilizes a precise combination of inorganic ceramic binders and unique auxiliaries, ensuring a seamless, uniform coating on each particle. Following application, the coated particles undergo specific temperature and time treatments, culminating in a final heat treatment that locks in their enhanced properties. The result is a vibrant red abrasive that sets new standards for performance and durability.

Key Features

Excellent Hydrophilicity: It facilitates better dispersion and bonding in resin matrices.
High Purity and Cleanliness: It reduces contamination risks and ensures consistent performance.
Strong Grain-Binder Affinity: It enhances bonding strength and minimizes grain pull-out.
Uniform Particle Size Distribution: It ensures stable grinding, uniform surface finishes, and improved tool consistency.
Superior Heat Dissipation: It reduces thermal stress and enhances tool longevity.
Enhanced Mechanical Properties: Including higher toughness and cutting stability.

Available Grades and Applications

We offer two distinct grades of Coated BFA, each tailored for specific high-demand applications:

HG-AB016 (Medium-Temperature Coated Brown Fused Alumina)

Description: A bright red, cubic abrasive.
Characteristics: Significantly improved hydrophilicity, strong bonding, and excellent heat dissipation.
Primary Application: Ideal for manufacturing high-grade resin-bonded abrasive tools.
Recommended Use: Especially effective for heavy-duty grinding and polishing of metals, delivering reliable cutting stability and an extended service life.

HG-AB017 (High-Temperature Coated Brown Fused Alumina)

Description: A dark red, cubic abrasive.
Characteristics: Marked improvements in toughness, hydrophilicity, cleanliness, magnetic substance content, and hardness compared to HG-AB016. It also boasts strong bonding and superior heat dissipation.
Primary Application: Designed for demanding resin-bonded abrasive tools used in high-requirement cutting and grinding of hard plates.
Recommended Use: Preferred for high-grade, heavy-duty grinding wheels, including those for double disc grinding and external cylindrical grinding. This grade ensures even higher cutting stability and a longer operational life, providing excellent heat dissipation while maintaining exceptional durability.

Technical Data

Chemical Composition

Al₂O₃	Fe₂O₃	SiO₂	TiO₂
95.10%	1.02%	0.85%	2.50%

Physical Properties

Type	Mohs Hardness	Color	Microhardness	Melting Point	Specific Gravity	Hydrophilia (F46)	Toughness (F24)
α-Al₂O₃	≥9.0	Red	1950-2250	2090 ℃	≥3.95	218mm	61%

Bulk Density

Grain Size	HG-AB016	HG-AB017
F12	1.93-2.03	1.93-2.03
F14	1.92-2.02	1.92-2.02
F16	1.91-2.01	1.91-2.01
F20	1.91-2.01	1.91-2.01
F22	1.89-1.99	1.89-1.99
F24	1.87-1.97	1.87-1.97
F30	1.83-1.93	1.83-1.93
F36	1.80-1.90	1.80-1.90
F40	1.78-1.88	1.78-1.88
F46	1.76-1.86	1.76-1.86
F54	1.74-1.84	1.74-1.84
F60	1.72-1.82	1.72-1.82
F70	1.71-1.81	1.70-1.80
F80	1.69-1.79	1.68-1.78
F90	1.67-1.77	1.65-1.75
F100	1.63-1.73	1.62-1.72
F120	1.61-1.71	1.60-1.70
F150	1.58-1.68	1.57-1.67
F180	1.55-1.65	1.54-1.64
F220	1.53-1.63	1.52-1.62

Available Grit Sizes

Our coated BFA (F-grit) is available in a comprehensive range of F8 to F800 grit sizes.

We can also provide custom enterprise grit standards to meet your specific operational requirements.

Our commitment extends beyond just supplying premium abrasives; we also offer comprehensive technical services to help you optimize your processes and achieve peak performance. Contact us today to discuss how our coated BFA (F-grit) can revolutionize your abrasive applications.