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This section provides an overview for ferrite magnets as well as their applications and principles. Also, please take a look at the list of 25 ferrite magnet manufacturers and their company rankings. Here are the top-ranked ferrite magnet companies as of July, 2025: 1.Magnetic Component Engineering LLC, 2.Alliance LLC, 3.Bunting-DuBois.
Table of Contents
【Thesis】
・Structure and Spin State of Iron(II) Assembled Complexes using 9,10-Bis(4-pyridyl)anthracene as Bridging Ligand
※first author
・Spin-crossover Phenomenon and Intermolecular Interaction for the Assembled Fe(II) Complexes Having Aromatic Rings
※first author
・On/off Spin-crossover Phenomenon and Control of the Transition Temperature in Assembled Iron(II) Complexes
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Ferrite magnets are made by mixing iron oxide with cobalt, nickel, and manganese. The molecular formula is represented as MFe2O4 (M = Mn, Fe, Co, Ni, Cu, Mg, Zn, Cd, etc.).
The composite metal M is dominated by divalent cations, and Fe3O4, where M = Fe, is black and is a well-known raw material called magnetite. Other compounds exist where the compound metal M is 1, 3, or even tetravalent cations, called ferrite.
The manufacturing process involves pressing powdered ferrite and baking it at high temperatures. It is also a type of ceramic. It can be synthesized from iron oxide Fe2O4 and is therefore inexpensive.
The characteristics of ferrite magnets are that they can be easily formed into any shape and are easy to process and that they are chemically stable and resistant to corrosion by rust and chemicals.
Applications of ferrite magnets can be divided into two types: hard ferrite and soft ferrite.
Hard ferrite magnets are ferrite magnets that become permanent magnets once they are attached to a strong magnet (by applying a strong magnetic field). U-shaped magnets are the most common type of magnet we see in our daily lives.
U-shaped magnets are typical examples. They are also used in small motors, speakers, headphones, and cassette tapes.
Soft ferrite is a ferrite magnet that becomes a magnet when in contact with a magnetic field and ceases to be a magnet when removed from the field. It is often used as a magnetic core and is suitable for transformers and coils.
Examples of easy-to-understand applications are used in radios, televisions, game consoles, automobiles, personal computers, microwave ovens, vacuum cleaners, and refrigerators.
The magnetic properties of ferrite magnets differ between hard ferrites and soft ferrites. First, let us explain the magnetic properties. Figure 1 shows the spin state of each magnetic property.
The types and characteristics of each type of ferrite magnet are shown in Figure 2. Saturation magnetization is the maximum magnetization at which the magnetization of a material does not increase even if the magnetic field is increased. Curie temperature is the temperature at which the magnet changes from ferromagnetic to paramagnetic.
Hard ferrite is a ferromagnetic material and a permanent magnet. Hard ferrites can be further classified into isotropic and anisotropic magnets according to the orientation of the magnetic poles of their molecules.
Soft ferrite is magnetic only while an external magnetic field is applied. Although the magnetic field is smaller than that of hard ferrite, it has excellent magnetic properties over a wide frequency range.
For example, a spinel-type crystal structure has a high magnetic permeability (the degree to which a material is magnetized) over a wide range of frequencies. The garnet type has the property that single crystals are not easily broken in the microwave frequency range.
Alnico magnets are manufactured by adding aluminum (Al), nickel (Ni), cobalt (Co), and other additive elements to iron and using casting methods or powder sintering.
Alnico magnets are characterized by their extremely high Curie temperature (the temperature at which they cease to be permanent magnets) of 860°C, allowing them to be used in high-temperature environments. Alnico magnets can recover their original magnetic force when returned to room temperature at temperatures ranging from room temperature to 400℃. Those manufactured by casting also have excellent mechanical strength.
Applications for Alnico magnets include electric motors, sensors, speaker units, and magnetic pickups for electric guitars.
Ferrite magnets are primarily composed of iron oxide, while Alnico magnets are composed primarily of iron with aluminum, nickel, and cobalt added. The retention of magnetic force in an Alnico magnet is small and easily demagnetized.
There is a limitation that they must have a long shape due to the need for a long distance between the poles. Also, the supply of the raw material, cobalt, is unstable and expensive, so ferrite magnets are less expensive.
Samarium cobalt magnets are rare earth magnets composed of samarium (Sm) and cobalt (Co). They are divided into SmCo5 (1-5 series) and Sm2Co17 (2-17 series) according to their composition ratio, with the 1-5 series, which contains less samarium, being widely used today.
Samarium cobalt magnets are characterized by a high Curie temperature of approximately 800°C at maximum. Because of its excellent corrosion resistance, it can be used as is without surface treatment, and its shape is highly selectable. Magnetic properties are higher than those of ferrite magnets and second only to those of neodymium magnets.
Because they can be used in environments up to about 350°C, they are used in space-saving, high-temperature environments where higher magnetic force than ferrite magnets is required. On the other hand, it has the disadvantage of low strength, which makes it prone to cracking and chipping. The raw materials samarium and cobalt are both rare, making them very expensive compared to ferrite magnets.
A neodymium magnet is a magnet composed mainly of neodymium (Nd), iron (Fe), and boron (B). Neodymium magnets are characterized by their easy oxidation and high thermal dependence.
Because they oxidize easily, their surfaces are nickel-plated before use. They are usually used at temperatures below 80°C. Because of its relatively high strength, it is also resistant to cracking and chipping.
Compared to ferrite magnets, magnetic properties are extremely high, with about four times the magnetic holding power and 10 times the maximum energy product. It is more expensive than ferrite magnets, but less expensive than samarium cobalt magnets.
*Including some distributors, etc.
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DEXTER MAGNETIC TECHNOLOGIES, a renowned manufacturer of magnetic solutions, was established in 1951 in the United States. The company excels in producing an array of magnetic products, including precision magnetic assemblies and custom magnets. With a calling to innovation, DEXTER MAGNETIC TECHNOLOGIES has maintained a pioneering stance in magnetic technology advancement. Their expertise lies in offering cutting-edge magnetic solutions across industries like aerospace, medical, and automotive, resulting in elevated performance and efficiency. DEXTER MAGNETIC TECHNOLOGIES shines in devising tailored magnetic answers to address distinctive challenges. Notably, their precision magnetic assemblies play a crucial role in medical imaging equipment, ensuring precise diagnosis.
Magnetic Component Engineering, Inc., founded in 1973, is a manufacturer of magnets and magnet assemblies based in Torrance, USA. The company provides services for the medical, defense, and aerospace industries. Their products are SAE AS9100D and ISO 9001:2015 certified. MCE's capabilities extend to research laboratories, semiconductors, telecommunications, and industrial applications. Known for unbeatable speed and responsiveness, With extensive experience, they can provide customized solutions, such as vacuum compatible systems for the semiconductor industry and critical communication links for telecommunication applications.
Bunting Dubois began in 1959 as Bunting Magnetics, Co. in Chicago, Illinois as a magnet manufacturer. Today, the company is based in Bunting, Pennsylvania, has attained ISO 9001:2015 certification, and manufactures a full range of magnetics manufacturing with both ferrite and rare earth compounds for consumers around the world in industries spanning aerospace, automotive, medical, and industrial manufacturing. The company seeks to source magnetic material outside of China in conflict-free areas and performs 100% of manufacturing inside the United States. The company assists customers by providing engineering and application support to produce solutions, especially in the case of rare earth magnets.
Alliance LLC is a supplier of permanent magnets and a manufacturer of customized magnetic assemblies for the automotive, industrial, medical, alternative energy, and communication industries. The company has several locations in the US, including Indiana, Kentucky, California, and Texas, and one outside the US, Mexico. Additionally, the company has ISO9001:2015 certification, and all suppliers within the Alliance LLC group are certified with ISO14001 Environmental Standards. Alliance LLC offers various neodymium discs and blocks for developmental and prototype projects. In addition to manufacturing custom designed magnetic assemblies, the company also has an extensive inventory of Ferrites, NdFeB, and Bonded magnets.
Integrated Magnetics was established in 1955 and based in Culver City, CA, as a manufacturer of permanent magnets, precision magnetic assemblies, electro-mechanical components, and custom electrical machines built for commercial, industrial, technical, and mission-critical applications. The company produces motors, rotors, halbach arrays, linear & rotary actuators, as well as motion & position sensors, alternators, and generators. The company serves the defense, aerospace, transportation, medical, and semi-conductor industries by offering services including finite element analyses, and quality planning & assurance. They also offer CNC machining, grinding programming, machine tooling & fixturing, and inspection tooling for industrial automation and energy sectors.
Bunting was founded in 1959 and is headquartered in Newton, Kansas. The company is a family-owned manufacturer of standard and custom magnetic components for domestic and international customers from industries such as food processing, plastics, recycling, and mining. The company’s main product lines include magnetic separation, metal detection material handling equipment, printing products, and custom magnets & magnetic assemblies. Custom designs include materials such as ceramic ferrite, alnico, and samarium cobalt and are made for Halbach arrays, pump couplings, actuators, and other components.
Master Magnetics, founded in the year 1976, and based in Florida, USA, is a manufacturer and supplier of a wide variety of magnets. Their product portfolio includes flexible magnetic material, rare earth magnets, neodymium magnets, ceramic magnets, samarium cobalt magnets, and alnico magnets. The company also offers custom cutting solutions, printing, and caring for flexible magnets services. The products are used in multiple industries which include automotive, hardware, cow or animal magnets, home improvement, and hobby magnets.
READE was originally established in Wolverhampton, England in 1773 as a pharmaceutical chemical and varnish manufacturer. Today READE is based in Riverside, Rhode Island in the United States and is an ISO 9001-certified distributor of specialty chemical solids. READE Advanced Materials offers a selection of hundreds of materials and compounds ranging from alloys in various forms to oxides, sulfides, individual elements, and specialty compounds. READE offers global sourcing, custom toll chemical processing, and custom toll packaging from metallurgical grade to pharmaceutical and food grade.
Tridus Magnetics & Assemblies, established in 1982, is a manufacturer and distributor of rare earth permanent magnets for use in audio transducers, electric vehicles, and other applications. The company, based in Rancho Dominguez, California, has a joint venture with San Huan High-Tech., Inc to manufacture sintered NdFeB magnets in Ningbo, China. Their Tri-Neo magnets are used in the automotive, industrial, and consumer electronics industries. Tridus also produces and supplies magnetic assemblies, Samarium Cobalt, and Ferrite magnets.
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.
Assfalg, founded in 1932 and headquartered in Schwäbisch Gmünd, Baden-Württemberg, Germany, is a manufacturer and trader specializing in deburring and chamfering machines for magnetic clamping and lifting technology. The company provides a diverse product portfolio, including manually operated magnetic chucks, flat pot magnets without threaded bush, and flat pot magnets with hook bolts among others. These products have applications in pneumatic magnetic beams for safe lifting operations and mobile and stationary metalworking.
Eclipse Magnetics is a British ISO 9001 manufacturer of permanent magnets that was established in 1914, and has been operating as a subsidiary of Spear & Jackson Group since 2001. Based in Sheffield, the company produces over 20,000 magnetic products for various uses including lifting, clamping of assemblies, filtration or separation, detection, and heating. Their products are primarily used by clients in the automotive, food production, chemical processing, and metal fabrication sectors. Eclipse Magnetics also provides customization, design, engineering, and prototyping services for full magnetic assemblies or new products.
Xiamen U-Polemag Electronics & Technology Co. Ltd. is a manufacturer of magnets and related devices that was established in 2011 in Xiamen, Fujian, China. The company primarily produces various magnet types, including samarium cobalt magnets, plastic magnets, and neodymium magnets. It also offers devices for magnetic applications such as speaker drivers, magnetic holders, and motor parts. The company is ISO 9001 and ISO/TS 16949-certified, and mainly serves clients in the renewable energy and industrial machinery sectors.
Magengine Co.,ltd was founded in 2005 and is a manufacturer of neodymium iron boron, samarium cobalt, ferrite, aluminum nickel cobalt, and magnetic tools based in Xicheng, Beijing, China. The company manufactures various products such as linear motor, casting steel, bonded magnets, soft ferrite, and EV charger products. The products have been used in various industries such as automobile, wind power, servo motors, rail transit, and medical equipments. The company has passed the ISO 9001:2015 certification for the quality management system.
Kanetec CO. LTD., founded in 1949 and headquartered in Nagano, Japan, is a designer, manufacturer, and supplier of magnet application equipment. Some of its products include permanent magnetic chucks, electro-magnetic chucks, tesla meters, magnetic holders, and lifting magnets. The magnet products have various uses in several areas, including milling, grinding operations, refrigerators, conveyors, and food processing. All of the motors of 0.75kW or more used in the company’s products are IE3 motors that comply with the Energy Conservation Act in Japan, and the company can also issue a calibration certificate for its measuring instruments upon request.
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.
DONGYANG CITY DONGZHENG MOTOR CO.,LTD. was established in 2003 and is a manufacturer and supplier of various gear motors products based in Dongyang, Zhejiang, China. The company offers various products such as planetary gearbox, DC gear motor, heavy truck tarp gear motor, brushless gear motor, and vacuum cleaner motor. The products have been used in various applications such as door systems, dump trucks, fruit juicers, water pools, and recreational vehicles. The company have obtained the certificate of ISO 9001:2015, ISO 14001, and OHSAS 18001. The products have passed the REACH, CE, UKCA, CCC, and RoHS compliance test.
Founded in 1968, Sagami Chemical Metal Co., Ltd. is a Japanese manufacturer and distributor headquartered in Sagamihara, Kanagawa, specializing in permanent magnets. Rare-earth magnets, the strongest permanent magnet, are offered under the NEOFLUX lineup, comprising neodymium magnets that retain magnetism even with size and weight reduction. The company also provides samarium-cobalt magnets, a type of rare-earth magnets which is resistant to rust and high temperatures. Other product offerings include cast magnets, neodymium magnets, made from plastics and metal powder for flexible shaping, as well as corrosion-resistant ferrite magnets. Furthermore, the company offers magnet-based products such as vibration motors for mobile phones.
IDEMAG was founded in 1993 and is a manufacturer and supplier of magnetic and electromagnetic separation equipment based in Castellbisbal, Barcelona, Spain. The company manufactures various products such as stainless magnetic separator, metal detector, overband with permanent magnets, magnetic filter for wet products, and high intensity magnetic separation for fine granulometries. The products are used in various applications such as mining, recycling, food, and pharmaceutical industries. The company has participated in 2023 IFAT Eurasia Exhibition Istanbul as exhibitor.
Sinosteel New Materials Co. Ltd, founded in 2002, is a China-based manufacturer and distributor of magnetics materials and associated products. The company manufactures and sells magnetic separators, magnetic ferrites, electrolytic manganese, magnetic materials, and other products using soft magnetic materials, such as sendust powder, manganese tetroxide, and iron silicon powder. It is also involved in testing and inspection services, such as inspection of metal products, structural parts, steel structures, and raw materials for engineering processes. The company’s operations also include mining materials, metallurgical equipment, and building materials for the domestic market.
Stanford Magnets was established in 1994 and is a manufacturer and supplier of permanenet magnetic products based in Lake Forest, California, United States. The company produce neodymium cylinder magnets, SmCo ring magnet, and alNiCo channel bar magnet. Custom magnets and magnetic assemblies are also provided by the company. The company supply grain boundary diffusion, low HRE technology, and multipole ring technology. Quality control of the company has been certified with ISO 9001, ISO 14001, and ISO/TS16949 standards.
Berardi Bullonerie, established in 1919 and headquartered in Bologna, Italy, is a distributor of transportation, logistics, supply chain, and storage. The company offers a range of products, including bolts, screws, springs, anchor bolts, and metal. It also offers plastic smallware, unified fasteners, hose clamps, and more. Its product reduces warehouse management costs and minimizes waste. The company has achieved ISO 9001:2015 certification for its quality management systems. It serves various industries such as construction, manufacturing, healthcare, engineering, and more.
Ranking as of July 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Magnetic Component Engineering LLC |
11.6%
|
| 2 | Alliance LLC |
8.7%
|
| 3 | Bunting-DuBois |
7.4%
|
| 4 | Sinotech |
7.2%
|
| 5 | CMI Integrated Technologies |
6.8%
|
| 6 | Hitachi Metals, Ltd. |
6.2%
|
| 7 | Reade Advanced Materials |
4.6%
|
| 8 | MARUWA CO., LTD. |
4.6%
|
| 9 | DEXTER MAGNETIC TECHNOLOGIES |
4.5%
|
| 10 | Bunting-Newton |
4.1%
|
Derivation Method
The ranking is calculated based on the click share within the ferrite magnet page as of July 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
10 | 45.5% |
|
Japan
|
4 | 18.2% |
|
China
|
4 | 18.2% |
|
Germany
|
1 | 4.5% |
|
United Kingdom
|
1 | 4.5% |
|
Spain
|
1 | 4.5% |
|
Italy
|
1 | 4.5% |
497 products found
497 products
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