Industrial Grade Ceramic Arc Magnets

Our ceramic arc magnets are produced from hard ferrite compounds (primarily strontium or barium iron oxide) via controlled dry or wet pressing and high-temperature sintering. They deliver stable magnetic output and robust demagnetization resistance for continuous industrial operation.

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Industrial Grade Ceramic Arc Magnets: Technical Specification & Procurement Guide

Material Specifications & Magnetic Grades

Magnetic Grade	Residual Induction (Br)	Coercivity (Hcb)	Max. Energy Product ((BH)max)	Typical Industrial Application
Y25 / Y30	3.8--4.1 kGs	>= 2.3 kOe	3.2--3.6 MGOe	Small household appliance motors, axial fans, auxiliary automotive actuators
Y30BH	4.0--4.3 kGs	>= 3.0 kOe	3.6--4.0 MGOe	Cordless power tool motors, standard fractional horsepower DC motors
Y35 / Y35BH	4.2--4.5 kGs	>= 3.2 kOe	4.1--4.5 MGOe	High-efficiency Brushless DC (BLDC) motors, small industrial generators, fluid pumps

Physical Properties:
Density: 4.8 to 5.1 g/cm3

Maximum Operating Temperature: Up to 250°C (grade and aspect-ratio dependent)

Temperature Coefficient of Reversible Remanence: Approx. -0.20% /°C

Environmental & Regulatory Compliance: Fully compliant with RoHS and REACH standards for global industrial export.

Geometry & Customization Parameters

Arc segments are engineered to match cylindrical rotor and stator profiles, minimizing the magnetic air gap and optimizing flux distribution across circular structures.

Available Shapes: Arc segments, curved tiles, multi-pole segments built to custom blueprints.

Dimensional Range:
Inner Radius (ID): Customized per stator/rotor outer diameter

Outer Radius (OD): Customized per housing inner diameter

Arc Angle (θ): Standard and custom spans (45°, 60°, 90°, 120°, etc.)

Length (L): Up to specified tooling limits

Magnetization Directions: Through-thickness, parallel, radial, or specialized multi-pole field orientations.

Surface Condition: As-sintered or precision surface-ground on inner/outer diameters and end faces to achieve strict assembly tolerances.

Inherent Material Advantages

Oxidation Resistance: Because ferrite is a ceramic oxide, the iron is chemically bound within a stable crystalline matrix. Unlike NdFeB (neodymium) magnets, ceramic magnets do not require protective nickel or epoxy plating for standard environments, eliminating coating degradation risks in humid or moist conditions.

Thermal Stability: Maintains predictable magnetic output during high thermal cycling up to 250°C, preventing sudden flux drops common in lower-grade rare earth alternatives.

Cost Efficiency: Utilizes abundant raw materials (iron oxide and strontium/barium carbonate), keeping component costs stable and shielded from rare-earth market volatility.

Primary Industrial Applications

Electric Motors: Permanent Magnet DC motors, Brushless DC (BLDC) motors, hub motors, and universal appliance motors.

Rotating Equipment: Small permanent-magnet alternators, wind turbine auxiliary generators, and tachometer generators.

Fluid Dynamics: Submersible water pumps, automotive cooling fan modules, and HVAC circulation blowers.

Separation & Automation: Magnetic pulleys, industrial filtration traps, and mechanical actuators.

Manufacturing & Quality Control Protocol

Batch Formulation & Compaction: Raw powders are mixed under strict stoichiometry and compacted in alignment fields to ensure uniform grain orientation and consistent magnetic flux across every piece.

Sintering: Fired in controlled-atmosphere kilns at temperatures exceeding 1100°C to achieve full ceramic densification and mechanical rigidity.

Precision Machining & Inspection:

Dimensions verified via optical comparators and digital gauges for radius, thickness, and parallelism.
Magnetic parameters tested using hysteresis graph tracers (Br, Hcb, Hcj, and (BH)max).
Visual inspection for micro-cracks, edge chipping, and surface inclusions.

Industrial Packaging: Packed in partitioned, shock-absorbing corrugated cartons with non-reactive separators to prevent transit chipping in brittle ceramic materials.

FAQ

Q: What are ceramic arc magnets used for?

A: Ceramic arc magnets are mainly used in electric motors, generators, pumps, fans, automation equipment, and other industrial magnetic assemblies. Their curved shape allows them to fit efficiently into cylindrical motor structures.

Q: Are ceramic arc magnets stronger than neodymium magnets?

A: No. Neodymium magnets generally provide much higher magnetic strength. However, ceramic arc magnets offer advantages in cost, corrosion resistance, temperature stability, and long-term reliability for many industrial applications.

Q: What temperature can ceramic arc magnets withstand?

A: Most industrial ferrite arc magnets can operate at temperatures up to approximately 250°C depending on the material grade and application design.

Q: Do ceramic arc magnets need coating?

A: Usually no. Ferrite ceramic magnets naturally resist corrosion because they are oxide-based materials. Additional coatings are generally unnecessary for normal industrial environments.

Q: Can you manufacture custom ceramic arc magnets?

A: Yes. We provide customized production based on customer drawings, including arc angle, dimensions, magnetic grade, magnetization direction, and packaging requirements.

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