Sintered AlNiCo Magnet Polished U-Shaped Single

Sintered AlNiCo Magnet U-Shaped Side View

Sintered AlNiCo Magnet Custom Polished U-Shaped Magnets丨CORT

Sintered AlNiCo Magnet Product Overview

Sintered AlNiCo Magnet represents a premium category of magnetic components manufactured through advanced sintering technology. These magnets feature customized U-shaped designs with polished surfaces, offering exceptional dimensional precision and mechanical strength. Unlike cast AlNiCo products, sintered variants provide tighter tolerances (±0.1mm) and superior mechanical properties, making them suitable for applications requiring intricate geometries and reliable performance in speaker systems, industrial machinery, and motor assemblies.

Sintered AlNiCo Magnet Technical Specifications

Parameter	Specification
Material	Sintered AlNiCo alloy
Shape	Customizable U-shapes and complex geometries
Coating	Polished surface finish
Tolerance	±0.1 mm
Magnetization Direction	Axial and diametrical options
Typical Magnetic Properties	Br: 1.0-1.4 T, Hc: 350-500 Oe
Mechanical Strength	Superior to cast AlNiCo products
Operating Temperature	-40°C to +550°C
Size Range	Typically smaller sizes (customizable)

Sintering Process Advantages

Sintered AlNiCo Magnet manufacturing involves compacting fine AlNiCo powder under high pressure, followed by controlled sintering. This process offers:
- Tighter Dimensional Tolerances: ±0.1mm precision for critical applications
- Complex Geometries: Capability to produce intricate shapes and configurations
- Enhanced Mechanical Strength: Improved durability compared to cast alternatives
- Consistent Material Structure: Homogeneous grain structure for reliable performance
- Cost-Effective Production: Efficient manufacturing for small to medium volumes

Sintered AlNiCo Magnet Application Scenarios

Speaker Systems: Precision magnetic components for high-fidelity audio equipment
Industrial Machinery: Positioning devices, sensors, and magnetic clamps requiring tight tolerances
Motor Assemblies: Compact motor components where dimensional accuracy is critical
Automotive Electronics: Custom magnetic solutions for specialized automotive applications
Instrumentation: Precision measurement equipment requiring stable magnetic fields

Customization Options

Sintered AlNiCo Magnet offers extensive customization options to meet specific application requirements:
- Shape Customization: U-shapes, horseshoes, and complex geometries tailored to your specifications
- Size Options: Small to medium sizes with tight dimensional control
- Magnetization Patterns: Axial, diametrical, or custom magnetization directions
- Surface Finishes: Polished standard finish or specialized coatings available upon request
- Tolerance Levels: Standard ±0.1mm or enhanced precision options for critical applications

Quality Control Process

Our Sintered AlNiCo Magnet manufacturing follows strict quality control procedures:
1. Raw Material Inspection
  - Powder purity verification (>99.9%)
  - Particle size distribution analysis (3-5μm range)
  - Alloy composition testing
2. In-Process Quality Checks
  - Green compact density measurement
  - Sintering temperature and atmosphere monitoring
  - Dimensional inspection after sintering
3. Final Product Testing
  - Magnetic property measurement per IEC 60404-5
  - Dimensional verification using coordinate measuring machine (±0.01mm precision)
  - Surface finish inspection (Ra < 0.8μm for polished surfaces)
  - Mechanical strength testing (transverse rupture strength)

Sintered AlNiCo Magnet Technical Parameters Table

Parameter Item	Specification Range	Testing Standard
Material Composition	Al-Ni-Co-Cu-Fe alloy	ASTM A801
Remanence (Br)	1.0-1.4T	IEC 60404-5
Coercivity (Hc)	350-500 Oe	IEC 60404-5
Operating Temperature	-40°C ~ +550°C	ISO 9001:2015
Density	7.0-7.4 g/cm³	ASTM B328
Hardness (Hv)	450-550	ISO 6507-1
Thermal Expansion Coefficient	11×10⁻⁶/°C (20-200°C)	ASTM E228

Frequently Asked Questions—Sintered AlNiCo Magnet

1. What are the main performance differences between Sintered AlNiCo Magnet and cast AlNiCo magnets?

Sintered AlNiCo Magnet offers tighter dimensional tolerances (±0.1mm vs. ±0.5mm for cast), superior mechanical strength, and better surface finish. Cast AlNiCo typically provides slightly higher magnetic properties but with larger size capabilities and lower production costs for high volumes.

2. What is the maximum size limitation for Sintered AlNiCo Magnet?

Sintered AlNiCo Magnet is generally limited to smaller sizes, typically with maximum dimensions of 100mm in any direction. For larger components, cast AlNiCo may be more suitable. We can provide specific size recommendations based on your design requirements.

3. How to choose between axial and diametrical magnetization for Sintered AlNiCo Magnet?

Axial magnetization (magnetic poles on opposite flat surfaces) is ideal for most flat or disc-shaped Sintered AlNiCo Magnet applications. Diametrical magnetization (poles on opposite sides of a cylinder) works best for rotating applications like sensors and encoders. Our engineering team can help determine the optimal magnetization pattern for your specific application.

4. What surface treatment options are available for Sintered AlNiCo Magnet?

Standard finish is polished (Ra < 0.8μm) with natural oxide layer. Optional treatments include nickel plating (5-10μm), zinc plating, or epoxy coating for enhanced corrosion resistance. The polished finish provides excellent corrosion resistance in most environments, making additional coatings unnecessary for many applications.