Magnet Knowledge

Typical Magnetic properties of Flexible rubber magnet, Rubber Magnets

Flexible Rubber magnets are compound materials made by mixing ferrite magnet powder and rubber. Pressing or rolling makes the finished flexible rubber magnet. Because the material has good plasticity, the finished flexible rubber magnets or semi-manufactured flexible rubber magnets can incise, stiletto, slit or back up other materials randomly, have good antisepsis and difficult demagnetization. The raw materials are plentiful, so the price is lower. Flexible Rubber magnets are natural Flexible Rubber magnets or isomer Flexible Rubber magnets. Natural rubber magnets have weak magnetism, are used on iceboxes, presswork and marketing and promotion premiums. Isomer rubber magnets have strong magnetism, and are used in such applications as micro-motors and magnet toys.

Typical Magnetic properties of Flexible rubber magnet, Rubber Magnets

Magnetic Properties of Sintered AlNiCo Magnet

AINiCo magnet is an alloy of aluminum-nickel-cobalt, has excellent temperature stability and corrosion resistance, it can be used in motor, sensor, separator, loudspeaker and holding system. This class of magnet remains a preferred material because of it’s excellent temperature stability, high magnetic flux density, and resistance to corrosion. Alnico magnets are manufactured through a casting or sintering process. The casting process allows for the magnet to be manufactured into intricate and complex shapes, which are not possible with other magnetic materials.

Magnetic Property of Ferrite Magnets

Made by means of powder metallurgy with main Chemical composition: Ba/Sro-Fe2O3.It is hard to be de-magnetized, with good anti-corrosion property.It can be made in various shapes of circular, cylinder, square, tile-type.

Characteristic:

1. processed by powder metallurgy method, low remanence and reversibility.

2. high coercive force, hard to be demagnetized, suitable for dynamic application.

3. hard and crisp ,usually cut by diamond tools.

4. main composed of oxide, not easy to be eroded.

5. usually work at – 40 °C to + 200 °C

6. both isotropic and anisotropic magnets are available. The magnetic properties of isotropic ferrite are low. Since they have nearly the same magnetic properties in all directions, so isotropic ferrite magnets can be magnetized in many different directions or in multi-poles. Anisotropic ferrite magnets have better magnetic properties compare with isotropic ferrite magnets. However this type of magnets can only be magnetized along a preferred direction.

Application:

1.widely used in permanent magnetic electric machinery, speakers,etc.

2.also used in all kinds parts of apparatus like micro electric machinery, electro-acoustic device, copying machines, medical equipment,etc.

Magnetic Property

Mostly Used standard

Chinese standard

USA standard

Europe standard
OX100=Y10T=C1      OX300=Y30=C5    OX330=Y30BH

The standard from International Electronics Committee(IEC404-8-1)

Characteristics and Application Range of Bonded Permanent Magnet

Characteristics and Application Range of Bonded Permanent Magnets

Inspection Standard for Permanent Magnets

1) When the permanent magnets is not supplied with specific size and shape, the properties of material should be tested. The test standard is as per GB/T3217-95 «permanent magnet (hard magnet) material test trial method»,GJB2453-95 «rare earth permanent magnet material general criterion» and relevant enterprise standard. GB/T3217 stipulated the test method. Enterprise standard stipulated the test process and sampling method.

2) When the permanent magnet is supplied with specific size and shape, the properties of the magnetic component should be tested. The properties of the material are only tested for reference.

3) For different permanent magnetic components, the test parameters and test methods are different. For magnetic ring, the test parameter is diametric flux density. For magnetic segment and block, the parameters can be surface field, magnetic flux etc. The magnetic flux is better.

A digital tesla meter can test diametric flux density

With a transverse sensor. Magnetic flux can be tested by permanent magnet tesla meter and Helmholtz coil.

For more information about the international standard, you may turn to the following reference:

IEC 404-5(1982) magnetic material Part 5: test measure for hard magnet (permanent magnet) material properties.

JISC 2501-1989 Test method for magnetic material(Japan)

4) When the permanent magnet is supplied as magnetic assembly or component,the properties of the magnetic assembly or component should be tested. The buyer and seller will negotiate and decide the specific test method with each other.

5) Unless specified by the user, we will adopt standard sampling method for the final test of the permanent magnet.

What are the uses of the magnets in your daily use ?

• Locate metal studs in a wall Seal off air-conditioning vents to improve home heating by placing vinyl-coated sheets over the steel register faces
• Hang Polaroid of projects-in-process on the lip of a metal shelf above the workbench
• Collect nails from a porch repair job that have fallen in the grass
• Prevent corrosion inside your water heater; a magnet placed on the freshwater intake pipe catches damaging metallic calcium particles before they can get inside
• Pin blueprints onto the side or hood of the truck
• Create a bulletin board without the use of tacks, tape, or hooks on walls coated with magnetized paint containing metals
• Protect a tractor engine: Ceramic magnets placed in the oil pan will attract steel bits that get into the oil from grinding pistons
• Fasten steel framing squares to the outside of toolboxes for quick access by gluing magnets to the box sides
• Clean up metal shavings that have fallen from the bench grinder onto the workshop floor

Technical date of sintered SmCo magnets

Technical date of sintered SmCo magnets

Typical Magnetic Properties

ISO 9001 Quality Standard Certified
Special properties can be achieved with custom method.

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Technical date of sintered NdFeB magnets

Flexible (Rubber) magnets overview

Flexible (Rubber) magnets are made by mixing Ferrite or Neodymium magnet powders and synthetic or natural rubber binders. Flexible (Rubber) magnets are made by rolling (calendaring) or extrusion methods. Flexible magnets are applied because of their advantages of versatility, low cost, and ease of use. Flexible (Rubber) magnets are usually manufactured in strip or sheet form that is widely used in micro-motors, gaskets, novelties, signs, and displays. Ferrite flexible (Rubber) magnet material is very low energy and its energy product is from 0.6MGOe to 1.7MGOe. No surface treatments are necessary for Flexible magnets. Ferrite based flexible materials are often laminated with white or colored printable vinyl, or with pressure sensitive adhesives to make assembly easy.

Key Advantages

Quick Leads

Common Applications

Displays  Toys and games  Warehouse labels  Window and door seals  Sensors  Latches  Holding Vehicle Signs  Paint Masking  Printed Premiums  Control Charts  Arts and Crafts Large Format Graphics  Masking  Photographs  Advertising Specialties  Menu Boards  Name Plates  Game Boards  Calendars

Can I paint over the nickel plating?

Yes, you can use any paint formulated for use on metal surfaces. Spray-on paint seems to work best.