24 Samarium Cobalt Magnet Manufacturers in 2023
This section provides an overview for samarium cobalt magnets as well as their applications and principles. Also, please take a look at the list of 24 samarium cobalt magnet manufacturers and their company rankings.
What Is a Samarium-Cobalt Magnet?
The samarium-cobalt magnet is one of the rare earth magnets (commonly known as "rare-earth magnets"), the others being neodymium magnets. Samarium and cobalt are the main components of a samarium-cobalt magnet, and it is a magnet that combines the two characteristics. While possessing solid magnetic force, these magnets are also resistant to heat. It is also rust-resistant, eliminating the need for plating and making it a very easy-to-use material. However, it is very brittle, has low strength, and is easily chipped. Therefore, it should be handled with great care.
Uses of Samarium-Cobalt Magnets
Due to its characteristics, samarium-cobalt magnets are often used to miniaturize products and sensors. The following are the main applications of samarium-cobalt magnets.
- Magnet couplings
- Motors ・Assemblies and magnetic circuits
- Micro switches
Laser machines samarium-cobalt magnets are versatile materials. There is a particularly strong need for places where it is necessary to withstand high temperatures and for small parts.
Principle of Samarium-Cobalt Magnets
The principles of samarium-cobalt magnets are explained here. Samarium and cobalt are the main components of samarium-cobalt magnets, so they combine the rust-resistant cobalt component with the samarium's high-temperature resistance. The reason why samarium-cobalt magnets can withstand high temperatures is thought to be due to their high Curie temperature. The Curie temperature is the temperature at which a magnet's ferromagnetic body changes into a paramagnetic body. It is named after Pierre Curie, who discovered it. When a ferromagnetic substance exceeds the Curie temperature, it loses its magnetic force, so the higher the Curie temperature, the more resistant the magnet is too high temperatures. Samarium-cobalt magnets have a Curie temperature between 760°C and 860°C, so you can see that they can withstand very high temperatures. However, if the humidity is low and the surface is polished, ignition is possible at lower temperatures. Although neodymium magnets have higher magnetic force than neodymium magnets, samarium-cobalt magnets are often used in places with high temperatures and humidity due to their heat and corrosion resistance.
Another disadvantage of samarium-cobalt magnets isis that their prices are high and constantly fluctuate due to their scarcity, increasing their cost.
Ignition of Samarium-Cobalt Magnets
While samarium-cobalt magnets resist heat, they can ignite under certain conditions, so care must be taken when handling them. In particular, they are particularly susceptible to ignition when the magnet surface is dry or cleanly polished and may burn at low temperatures.
In addition, samarium-cobalt magnets are more brittle than other magnets and are easily chipped by impact, so depending on how they are used, a fine powder of samarium-cobalt alloy may be produced. This metallic powder can spontaneously combust or burn. In general, metallic powders such as rare earths are highly flammable due to their large surface area and frequent contact with air. Because of this hazard, they are designated flammable solids under the Fire Service Act, class II hazardous materials. The metallic powder generated may ignite due to frictional heat, etc. Therefore, it must be used safely by avoiding situations where it rubs against other objects and generates heat or where the samarium-cobalt magnets are worn away, and alloy powder is generated.
Samarium-Cobalt Magnets and Dr. Tawara
During the 1960s and 1980s, research on samarium-cobalt magnets was conducted worldwide. Still, the Japanese physicist Dr. Yoshio Tawara developed the highest-performance samarium-cobalt magnets (Dr. Yoshio Tawara was the first to develop samarium-cobalt magnets). (Dr. Yoshio Tawara is the father of Machi Tawara, a poet famous for his poetry collection "Salad Anniversary," and several of his poems are about magnets.)
The samarium-cobalt magnets developed by Dr. Yoshio Tawara contain transition metal elements such as iron, copper, and zirconium in addition to samarium and cobalt, Sm2(Co, Fe, Cu, Zr)17. It is made so that the combined composition ratio of cobalt, iron, copper, and zirconium is 17 to samarium-2. This represents the highest performance of any samarium-cobalt magnets, far surpassing the performance of the initially developed SmCo5 (a composition ratio of 5 cobalt to 1 samarium).
Since samarium-cobalt magnets contain much expensive cobalt, developing high-performance magnets based on inexpensive iron has been promoted. Later, the price of cobalt skyrocketed, leading to a supply crisis, and research and development on the subject of samarium-cobalt magnets dwindled.
List of 24 Samarium Cobalt Magnet Manufacturers
*Including some distributors, etc.
Sort by Features
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- Company Size: largest first
- Year Founded: oldest first
- Year Founded: earliest first
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- United States of America
- China
- Israel
- Japan
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OneMonroe (Monroe Engineering Products)
Samarium Cobalt Magnets
Company Overview
OneMonroe was founded in the 1920s and is located in Rochester Hills, Michigan. OneMonroe is an ISO 9001:2015 and AS9100D certified global industrial manufacturing company serving several types of customers including manufacturers, distributors and catalog-houses across several vertical markets including aerospace/defense, automotive, medical, and transportation. Product lines include adjustable handles, bearings, casters, gaskets, hydraulic clamping, military spec hinges, molded rubber, piano hinges, pins, pull handles, quick release pins, seals, springs, toggle clamps, and various harnesses. Custom manufacturing is also available to meet specific customer needs.
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Sinotech
Samarium Cobalt Magnets
Company Overview
Sinotech is based in Portland, Oregon with offices in China. Sinotech is a distributor for custom-engineered electrical motors, motor components, and mechanical components manufactured in China. Sinotech’s motors include AC motors, DC motors, brushless DC motors, slotless high speed BLDC motors, stepper motors, cordless motors, gear motors, servo motors, and miniature motors. Motor components include laminations, wound coils, armature and field coils, brushes, and communicators. Mechanical components include assemblies, die castings, investment castings, sand castings, shafts, steamed metal parts, tubular metal parts, machined extrusions, plastic parts, rubber parts, and secondary processing.
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Goodfellow Corp.
Samarium Cobalt Magnets
Company Overview
Goodfellow was established in London, England in 1946. Goodfellow is a distributor of metals, alloys, ceramics, polymers, and compounds for scientific and academic research, manufacturing, and design industries. Goodfellow products are ISO 9001:2008 accredited. Goodfellow provides services, custom manufacturing, and standard supplies for customers. Service includes access to its knowledge base as well as technical expertise. Custom manufacturing is available for different cycles of manufacturing, precision machining forming, coating, and surface treatment. Standard supplies include access to over 150,000 in-stock advanced scientific materials.
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Electron Energy Corporation
ULTRA-HIGH TEMPERATURE SAMARIUM COBALT MAGNETS
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Magma Magnets Ltd
Samarium Cobalt Magnets
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Eclipse Magnetics
Samarium Cobalt SmCo Magnets
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Celduc Inc.
Samarium Cobalt Magnets
Company Overview
Celduc Inc. through Celduc Transfo was founded in 1960 as a manufacturer of transformers. Celduc Inc. is based in, France. Celduc Inc. was officially created in 2020 and headquartered in Centerport, New York. Celduc creates electronics and customized products for industries including railway, plastic, packaging, medical, and electronics. Celduc’s main product lines include solid state relays, magnetic proximity sensors, reed relays & switches, and customized products. Customized products are versions of other products adapted for use in industries with special needs such as nuclear power, aircraft, and agriculture.
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Samarium Cobalt Magnet Manufacturer Ranking
*Including some distributors, etc.Number of Employees
- Toshiba Materials Co., Ltd.: 529
Newly Established Company
- Toshiba Materials Co., Ltd.: 2003 (20 years ago)
- Apex Magnets: 2003 (20 years ago)
- Magma Magnets Ltd: 1979 (44 years ago)
Company with a History
- Adams Magnetic Products Co.: 1950 (73 years ago)
- Electron Energy Corporation: 1970 (53 years ago)
- MASTER MAGNETICS , Inc.: 1976 (47 years ago)
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