Custom Ceramic Arc Magnets

We manufacture custom ceramic arc magnets (ferrite segments) tailored for electric motors, generators, and rotational magnetic assemblies. Backed by over 15 years of manufacturing expertise, our facilities operate under strict ISO 9001 and IATF 16949 quality management standards to support both rapid prototyping and millions of units in annual high-volume production. All materials are fully compliant with RoHS, REACH, and Conflict-Free Mineral directives, providing a reliable, cost-effective permanent magnet solution for global tier-1 and tier-2 manufacturers.

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Custom Ceramic Arc Magnets & Ferrite Segments

Technical Advantages for Motor & Magnetic Design

Optimized Air Gap Geometry: Curved arc configurations conform closely to rotor surfaces, enhancing magnetic flux distribution and minimizing flux leakage compared to standard block or flat magnets.

Cost-Effective Volume Production: Manufactured from iron oxide and barium/strontium carbonate, ceramic ferrite eliminates rare-earth price volatility, making it ideal for applications requiring thousands to millions of units annually.

Natural Corrosion Resistance: Ferrite material is inherently inert and resistant to oxidation in humid or industrial environments, eliminating the need for protective zinc or nickel platings.

Thermal Stability: Standard and high-coercivity grades maintain stable magnetic output up to 250°C, resisting thermal demagnetization during continuous mechanical operation.

Typical Material Specifications

Parameter	Typical Range
Material Type	Hard Ferrite (Ceramic Ferrite)
Maximum Energy Product (BHmax)	1.0--4.5 MGOe
Residual Induction (Br)	2000--4500 Gauss
Coercive Force (Hcb)	1600--4000 Oe
Density	4.8--5.1 g/cm3
Max Working Temperature	Up to 250°C (grade dependent)

Customization Parameters & Engineering Support

Magnets are fabricated according to specific engineering requirements, supported by our in-house engineering team for DFM (Design for Manufacturability) review:

Geometries: Single arcs, multi-pole segments, or irregular curved configurations.

Dimensional Tolerances: Inner diameter, outer diameter, arc angle, length, and wall thickness precision-machined to print.

Magnetization Direction: Diametrical, radial, or specialized multi-pole field orientations tailored to your magnetic circuit design.

Primary Applications

Electric Motors: Permanent magnet DC motors, brushless DC (BLDC) motors, and auxiliary automotive actuators.

Rotational Equipment: Small alternators, wind generators, and industrial pumps.

Magnetic Transmission: Non-contact magnetic couplings and industrial automation drives.

Manufacturing & Quality Control

Our production process follows strict industrial verification standards to ensure batch-to-batch consistency:

Powder Compaction: Wet or dry pressing under controlled tonnage to ensure uniform density and structural integrity.

High-Temperature Sintering: Precise thermal profiles to achieve permanent magnetic orientation and mechanical strength.

Dimensional Finishing: Advanced surface grinding to maintain precise inner and outer radius tolerances.

Performance Verification: 100% batch testing using high-precision fluxmeters to measure residual induction, coercive force, and total magnetic flux before export-grade packaging.

FAQ

Q: What are custom ceramic arc magnets?

A: Custom ceramic arc magnets are curved permanent magnets made from ferrite magnetic materials. They are primarily designed for motors, generators, and magnetic assemblies where a curved magnetic field and precise air gap are required.

Q: What information should I provide for a custom ceramic arc magnet order?

A: To accelerate quotation and sample development, please provide:

Detailed engineering drawings (PDF / CAD / STEP)
Dimensions and arc angles
Magnetic grade requirements
Magnetization direction
Estimated annual usage (EAU) / target delivery schedule
Application details

Q: Are ceramic arc magnets suitable for electric motors?

A: Yes. Ceramic arc magnets are widely used in DC motors, BLDC motors, automotive fans, industrial pumps, and home appliances because they provide stable magnetic performance, excellent demagnetization resistance, and unmatched cost efficiency.

Q: What is the maximum operating temperature of ceramic arc magnets?

A: The operating temperature depends on the specific ferrite grade and motor magnetic circuit design. Many high-coercivity ceramic grades can operate reliably at temperatures up to approximately 250°C.

Q: Do ceramic arc magnets need coating or plating?

A: Generally, no. Ceramic ferrite magnets possess native, excellent corrosion resistance and do not require protective coatings like zinc or nickel, saving additional manufacturing costs.

Q: Can you produce magnets according to customer drawings or samples?

A: Yes. We specialize in OEM/ODM custom manufacturing, producing arc magnets strictly according to customer technical specifications, drawings, or golden samples.

Q: What tolerances can you achieve for ceramic arc magnets?

A: Tolerances depend on the magnet's physical size, shape, and tooling design. Our precision grinding lines achieve tight dimensional control tailored to demanding motor assembly requirements.

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