Ceramic Magnets Alnico



Ceramic Magnets are used in a variety of applications since they are inexpensive (compared to other magnet materials), offer moderate strength, are readily available in a wide range of sizes/shapes, and easily magnetized in a variety of formats. 

Frequently, Ceramic Magnets are used in Sandwich, Round Base, and Channel magnets to multiply the holding force while keeping costs reasonable. If you want a large number of reliable magnets at an affordable price, consider AlNiCo ceramic magnets for your business.


AlNiCo magnets have numerous applications for multiple industries. AlNiCo magnet suppliers — like Rochester Magnets — work with different industries to find the complete range of uses for ceramic magnets, some of which include: 

DC Motors – Speaker Magnets – Magnetic Separators – MRI – Magnetic Assemblies (lifting, holding, retrieving, separating) – Arts and Crafts – Automotive Sensors – Refrigerator Magnets.

Rochester Magnets can help you find the right type and amount of ceramic magnets for your business or operation. 


Ceramic magnets are some of the most economically friendly magnets on the market. They can be used at fairly high temperatures, and they are part of the permanent magnet family. Here is some other general information about ceramic magnets:

  • Magnetic Field orientation is through the thickness.
  • All dimensions are in inches.
  • Specifications subject to change without notice.
  • Unless otherwise specified, all magnets will be furnished in conventionally magnetized condition.
  • Magnetic Field orientation is through the thickness.


Understanding your magnet’s tolerance can help you ensure its strength is stable:

  • Blocks – Tolerances on blocks are the greater of +3% or +0.045″ on cross-sectional dimensions, and 0.005″ on the orientation direction.
  • Discs and Rings – Tolerances on diameters are the greater of plus or minus 1.5% or +0.015″, and the greater of plus or minus 1% or plus or minus 0.010″ on lengths.


Stock and custom shapes, sizes, and grades available. Please contact us to assist with your application.


AlNiCo and Ceramic Magnets are available in different grades — each with a specific set of characteristics. The chart below summarizes several pertinent characteristics to assist with application. AlNiCo grades are specific to ceramic magnets, representing the strength for each magnet grade.

MaterialMax. Coercive Force (Oe)BH Max (MGOe)Max. Operating Temp. (°C/°F)
Sintered AINiCo 25601.50540/1000
Cast AINiCo 56405.50540/1001
Sintered AINiCo 56203.95540/1002
Cast AINiCo 816505.30540/1003
Sintered AINiCo 815004.00540/1004
Ceramic 218601.00400/750
Ceramic 524003.40400/751
Ceramic 829503.50400/752


The strongest of the Non-Rare Earth Magnets are also excellent for high-temperature applications. While quite hard and brittle, they can be machined using special tools and equipment to close tolerances.

Two different manufacturing processes are used; magnets are either Cast or Sintered, and a wide variety of shapes and sizes are readily available. 

A Sintered AlNiCo magnet is structurally stronger than Cast AlNiCo and generally provides parts with closer tolerances prior to machining. 


Different material grades provide price/performance options. The chart to the right provides summary information; contact us for detailed technical information. 


The ability to form and machine this material provides a wide range of potential sizes and shapes as the photograph above illustrates. So, although many standard sizes and shapes are available, this is an excellent magnet when a specific size, shape or configuration is required.

Applications requiring close size tolerances often use these magnets since they can be machined and ground to size. If you need a specific size or shape for a display and you are unsure of which magnet type to use, ceramic magnets are a great option. We carry both stock and custom sizes for all industries and applications. 


AlNiCo magnets can be partially demagnetized if like poles of magnets are brought together. Placing individual magnets in contact with ferrous materials can also partially demagnetize them. Care must be exhibited in handling magnetized magnets. 

Typical AlNiCo grade 5 ceramic magnet applications require a long magnetic length to pole surface ratio (usually 4:1 or greater) to ensure reliable magnetic performance. 


When you are looking for magnets for any purpose, you have many options to choose from. At Rochester Magnet, our team of experts can discuss intended usage, industry specifics, and more with you at any time. We pride ourselves on providing high-quality magnets and services to every client.

You can buy ceramic magnets from Rochester Magnet after you receive your free online quote. To start, submit a quote request to talk to our sales team about how we can get you the right product for your application.

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