Aerospace & Defense: Satellite thrusters, radar systems, and jet engine sensors require resistance to extreme temperatures and radiation.
Medical Technology: MRI equipment, surgical robots, and implantable devices requiring biocompatible, non-corrosive materials.
Energy & Industrial: High-efficiency motors for electric vehicles, wind turbines, and downhole drilling tools in oil/gas exploration.
Scientific Research: Particle accelerators, cryogenic systems, and fusion reactors require magnetic fields that maintain stability under stress.
Automation & Robotics: Precision actuators, magnetic bearings, and suspension systems in semiconductor manufacturing.
| Physical performance sheet of sintered SmCo | ||
| arameters | SmCo5 | Sm2Co17 |
| aBr (%/ ℃) | -0.04 | -0.03 |
| aHcj (%/ ℃) | -0.3 | -0.2 |
| Curie temperature(C) | 700-750 | 800-850 |
| density (g/cm3 ) | 8.2-8.4 | 8.3-8.5 |
| Webster hardness (HV) | 450-500 | 500-600 |
| Working temperature(°℃) | 250 | 350 |
FAQ
Q1: SmCo magnets claim to be "corrosion-resistant without coating", but do they need additional protection in strong acid or marine environments?
A2: Standard SmCo magnets do not require coating in most environments, but we provide enhanced solutions for special working conditions:
Strong acid/chemical corrosion: optional gold plating (Au) or Parylene coating, resistant to acid and alkali solutions with pH 1~14.
Marine high salt spray environment: epoxy resin encapsulation or Al ion plating, passed ISO 9227 salt spray test (1000 hours without rust).
Customization suggestions: Based on customer application scenarios, a free corrosion protection solution selection guide is provided.
Q2: We need non-standard size annular SmCo magnets (such as ultra-thin wall thickness or ultra-large aperture), what is your company's processing capability?
A2: We support high-difficulty precision processing:
Size range: outer diameter 5~500mm, thinnest wall thickness 0.5mm (tolerance ±0.02mm), aperture accuracy up to H7 level.
Process guarantee:
Use CNC internal circle slicer + laser trimming to avoid micro cracks caused by traditional processing.
Direct molding after sintering to reduce the risk of stress deformation.
Case: We have customized SmCo thin-walled rings with an outer diameter of 200mm and a wall thickness of 1mm for magnetron customers, with a magnetic flux uniformity of >98%.
Q3: Our equipment needs to work in a strong vibration environment. How to ensure the structural reliability of SmCo magnets?
A3: We improve the vibration resistance through the following measures:
Material strengthening:
Use high-density sintering process (density ≥8.4g/cm³) to reduce internal porosity.
Add trace Ti elements to enhance grain boundary bonding.
Structural design:
Provide ring magnets with positioning grooves or flanges for easy mechanical fixation.
For high-frequency vibration scenarios, a multi-stage splicing structure can be designed to disperse stress.
Test verification:
Customization highlights:
Highlights of adjustable composition, temperature resistance extension, precision machining, vibration resistance design and other differentiated capabilities.
Combine specific data (such as tolerances, test standards) to enhance professionalism.
Demonstrate technical strength through actual cases (such as thin-walled rings).
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