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Custom-shaped Ceramic Magnets

Product Specification & Technical Parameters

Custom-Shaped Ceramic (Ferrite) Magnets

Direct Manufacturer & OEM Supplier for Industrial, Automotive, and Electronics Applications

Material Composition	Strontium Ferrite (SrO·6Fe2O3) or Barium Ferrite (BaO·6Fe2O3)
Available Grades	Y25, Y30, Y30BH, Y33, Y35 Series
Maximum Energy Product (BHmax)	1.0--4.5 MGOe
Operating Temperature	-40°C to +250°C (grade-dependent)
Density	4.8--5.1 g/cm3
Surface Treatment	None required (naturally corrosion-resistant)
Customization Scope	Irregular geometries, arc segments, multi-hole designs, and custom pole orientations based on CAD drawings or physical samples.

Technical Advantages

Geometry Optimization for Mechanical Integration

Standard block, ring, or disc magnets often fail to match complex mechanical assemblies. Custom-shaped ferrite magnets are engineered to fit restricted installation spaces, optimize magnetic circuit paths, and reduce total assembly weight.

Manufactured Geometries: Arc segments, curved blocks, multi-hole profiles, and irregular asymmetric shapes.

Production Tolerance: Controlled strictly per customer engineering drawings.

Environmental Stability and Corrosion Resistance

Ferrite materials are ceramic oxides that do not oxidize under standard atmospheric conditions.

Unlike sintered NdFeB (neodymium) magnets, custom ceramic magnets do not require protective metallic or epoxy coatings (such as nickel or zinc) to prevent rust.

Maintains structural and magnetic integrity in humid, outdoor, and high-temperature environments up to +250°C.

Eliminates coating failure risks and reduces secondary processing steps.

Economic Viability for High-Volume Production

Utilizing earth-abundant raw materials (iron oxide and strontium/barium carbonates), ceramic magnets provide a low-cost alternative to rare-earth permanent magnets.

Cost Efficiency: Significantly lower raw material and tooling investment for large-scale manufacturing runs.

Performance Balance: Moderate magnetic strength with high intrinsic coercivity (Hci), offering strong resistance to external demagnetization fields.

Manufacturing Process & Quality Control

Powder Preparation:

Raw materials are proportioned, wet-milled, and calcined to achieve the targeted ferrite chemical composition.

Pressing:

Powder is compacted using precision tooling-either via dry pressing or wet anisotropic pressing (aligned in a magnetic field to maximize magnetic output).

Sintering:

Compacted parts are fired in high-temperature tunnel kilns to achieve final mechanical strength and crystalline structure.

Machining & Finishing:

Diamond grinding wheels are used where tight dimensional tolerances are required.

Magnetization & Testing:

Parts are magnetized via custom fixtures and verified for flux output, dimensions, and visual defects prior to bulk export packaging.

Primary Industrial Applications

Electric Motors & Actuators:

Fractional horsepower DC motors, automotive auxiliary motors, and fan rotors.

Audio Transducers:

Speaker drive units, alarm buzzers, and communication equipment.

Separation Systems:

Magnetic rollers and traps used in food processing and recycling machinery.

Sensor Systems:

Reed switch actuators, Hall-effect position sensors, and industrial automation components.

FAQ

Q: What file formats are accepted for custom magnet design?

A: CAD drawings (STEP, IGES, DXF) or detailed 2D engineering blueprints specifying dimensions, tolerances, magnetic grade, and pole orientation.

Q: Can ceramic magnets be machined after sintering?

A: Due to the brittle nature of ceramic materials, post-sintering machining is limited to diamond grinding. Complex features must be engineered into the pressing molds.

Q: What is the typical lead time for custom tooling and samples?

A: Tooling and sample production generally take 2 to 3 weeks, depending on the geometric complexity of the custom shape.

As one of the most professional custom-shaped ceramic magnets manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized custom-shaped ceramic magnets at competitive price from our factory.