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One of the oldest members of our magnet family, Alnico remains the workhorse of the permanent magnet industry and can be relied upon to deliver impressive flux density at an economical price. Alnico also boasts the lowest temperature coefficient of any commercial magnet material (.02% per degree centigrade) allowing for excellent stability over a wide temperature range.
Alnico has experienced renewed interest in recent years in such temperature-sensitive applications as hall-effect and MR-based automotive and electronic sensors, in addition to the traditional magnetron, TWT professional amplifiers, industrial actuators, motors and instruments applications that have long relied upon Alnico. |
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Alnico magnets are made up of Aluminium, Nickel and Cobalt.
Although this type of magnets have a very high remanence induction, the coercivity is very low. It shows great stability in temperatures, maintaining its magnetic features between -250ºC and 425ºC.
This type of magnets are used mainly in measuring equipments and detection systems by magnetic fields (analytical weighing, brakes,...).
This is the magnet quality which offers best behaviour regarding temperature increase.
=>Magnetised cilindricbars
=>Industrial bridge
=>Horseshoe Magnets
=>Low Magnetic Bases
=>Hight Magnetic Bases
=>Demagnetisation Curves
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Material Information
* Produce by casting or powder metallurgical techniques
* An alloy composed of matrix of Al-Ni-Fe-Co
* Very hard & brittle
* Poor resistance to demagnetization
* Produce good flux density at an reasonable cost
* Excellent stability over a wide temperature range |
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AlNiCo materials, composed primarily of alloys of Aluminum, Nickel, Cobalt, Ferrum and other metal elements. They are characterized by excellent temperature stabilities (Its working temperature can be as high as 550 degrees Centigrade), high residual inductions, and relatively high energies. They are manufactured through either casting or sintering process. Cast magnets may be manufactured in complex shapes, such as horseshoes, not possible with other magnet materials. Sintered AlNiCos offer slightly lower magnetic properties but better mechanical characteristics than cast AlNiCos. AlNico is hard and brittle. Machining or drilling cannot therefore be accomplished by ordinary methods. AlNiCo has a low coercive force, and is easily demagnetized if not handled with care.
Cast AlNiCo5 is the most commonly used of all the cast Alnicos. This material is used extensively in rotating machinery , meters, instruments, sensing devices, and holding applications, to name a few.
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Alnico magnets, composed of primarily aluminum, nickel, and cobalt, were developed in the 1940's. 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 sinter process. The casting process allows for the magnet to be manufactured into intricate and complex shapes, which are not possible with other magnetic materials.
Ningbo Tongchuang Strong Magnet Material Co.,Ltd is an original factory specializing in Neodymium magnetic, and also manufacturing and marketing
other permanent magnets, such as Sm-Co, Al-Ni-Co, hard ferrite and rubber magnets. |
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Alnico permanent magnets
AlNiCo materials, composed primarily of alloys of Aluminum, Nickel, and Cobalt are characterized by excellent temperature stabilities, high residual inductions, and relatively high energies.
AlNiCo alloys have some of the highest Curie points of any magnetic material, around 800 °C. This material is used extensively in application required high temperature up to 450°C.
Alnico magnets are manufactured through either a casting or sintering process. Cast magnets may be manufactured in complex shapes. AlNiCo magnets are cast close to final size and then finish machined to closer tolerances. Sintered AlNiCo offer slightly lower magnetic properties but better mechanical characteristics. AlNiCo has a low coercive force, and is easily demagnetized if not handled with care.
Some types of AlNiCo are isotropic and can be efficiently magnetized in any direction. Other types, such as AlNiCo 5, 8 and AlNiCo 12, are anisotropic, with each having a preferred direction of magnetization, or orientation. |
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Toshiba pioneered the development of Cobalt (Co)-based amorphous (non-crystalline) magnetic alloys for electronic applications. Toshiba offers amorphous magnetic cores for noise suppression, mag-amps, snubbers and pulse transformers. Key applications for these amorphous cores include switching supplier of power supplies, noise sensitive equipment, medical instruments and telecommunications.
Improvements in magnetic properties have resulted from Toshiba's commitment to research and development. Toshiba continues its R&D programs to further improve the properties of the amorphous alloys and the magnetic components made from them.
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| Ceramic (ferrite) magnets are composed of strontium carbonate and iron oxide. They are charcoal gray in color and usually appear in the forms of discs, rings, blocks, industrial cylinders, and sometimes arcs for motors. |
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The professional cylinder rare earth magnets
Ningbo Tongchuang is a professional factory to manufacture neodymium magnets in Ningbo China, we arrange to produce according to customers' requests.( the grades of magnets , the dimension, the professional coatings, the Qty, and so on.)
About the cylinder magnets, it is widely used in motors, speakers, and so no. The grade of such magnets can be Grade N, M , H, SH, UH,EH, AH.The details of each grade of the neodymium magnets please see our PDF catalogue " Magnets in Ningbo Tongchuang".
The size can be Diameter 1.20mm to 200.mm, length 0.50mm to 50.00.
The coating of NdFeB magnets can be Zn, Ni, Ni-Cu-Ni, Epoxy, CR3+ZN, NI+AG, NI+AU and so on.
If you are interested in our factory, please do not hesitate to contact us, we are at your service any time
Contact details:
Steve Chen (Mr.)
Email: tcexport@ndmagnets.com
Tel:86-574-88170908
Fax:86-574-88170906
Mobile:86-15990259284
MSN: toddywell@hotmail.com
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| Neodymium magnets (Nd-Fe-B) are composed of neodymium, iron, boron and a few transition metals. These magnets are extremely strong for their small size, metallic in appearance and found in simple shapes such as rings, blocks and discs. |
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These electromagnetic holding magnets are used in electrically operated independent clamping units to hold open fire safety doors and exits. The doors are held open either in a fixed position or in a manually adjustable angle until they are electrically released.
Magnets for EX applications with ATEX certification are available.
Size: 42 - 70 mm with quality control
Holding force: 300 - 1568 N by quality controlled
goods
Rated torque: 1.5 - 3.0 |
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HARD FERRITE MAGNETIC
Hard ferrite (ceramic) industrial magnets were developed in the 1960's as a low cost alternative to metallic magnets. Even though they exhibit low energy (compared with other permanent magnet materials) and are relatively brittle and hard, ferrite magnets have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact, measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of Dc motors manufacturers, manufacturer of magnetic separators, magnetic resonance imaging and automotive sensors.
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Barium and strontium Ferrite magnets are economical and quality components which may be found in such different applications like automation, control, measurement, etc.
Ferrite magnets may be isotropic or anisotropic. In anisotropic qualities, during the pressing process, a magnetic field is applied. This process lines up the particles in one direction, obtaining better magnetic features.
Through sintering, (thermal processing at high temperatures), pieces in their definite shape and solidity are obtained.
Available:
=>Ferrite Blocks
=>Ferrite Disks
=>Ferrite Rings
=>Technical Properties
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The raw materials Magma uses to produce hard-ferrite magnets, ate Barium-Ferrite and Strontium-Ferrite .
These raw materials ate easily (Sr0.6 Fe203) and Strontium-Ferrite (Ba0.6 Fe203) available and therefore hard ferrite magnets offer the best value for money.
Anisotropic sintered ferrite permanent magnets are made by using ceramics technology, similar to the one used for making porcelain The powder is pressed under the influence of external magnetic field to determine the magnetic orientation of the powder grains.
Magma specializes in the production of anisotropic wet-pressed magnets. "Hard" magnets are characterized by high coercivity (Hcb, Hci), related to the remanence (Br).
Their magnetizing remains permanent, and stability is excellent. Being oxids, hand ferrites operate in a very tough environment, without the need of coating (the surface can however be coated, if extreme cleanliness is needed by the customer).
Hard ferrite's mechanical properties are like other ceramics. They are sensitive to mechanical impact. Machining is done mainly by diamond grinding.
Wet pressed anisotropic hard ferrites are now used extensively in the automotive industry, as rotors or stators in D.C. motors, in home appliance industry, as rotors for synchronous motors and in the audio industry in loudspeakers, earphones and micromotors.
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STRIP
Thickness: 0.030" to 0.375"
Width: 0.25" to 6.00"
Energy: 0.50 to 1.90 MGOe
Standard Lengths: As much of the strip we produce is custom, lengths are available on request. We have run up to 15,000' continuous lengths.
SHEET
Thickness: 0.010" to 0.375"
Width: 0.25" to 24.312"
Energy: 0.65 to 1.60 MGOe
Standard Lengths: 25', 50', 100' lengths stocked, other lengths available by request. We have run up to 3,000' continuous lengths.
Other capabilities or secondary conversion available from Flexmag:
Laminates
Pre-cut lengths, pieces or blanks
Kiss-cut strips
Retail-ready packaging
Die-cut shapes
Variety of standard industrial adhesives
Custom magnetic pole patterns
Special length reels
Private professional label packaging
Back printed or embossing |
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Material Information
* Made by consolidating Strontium or Barium ferrite powder with polymer matrix. Form in profiles, strips & sheets by extrusion / calendering method.
* Product can be stamped, slit, punched & laminated
* Good demagnetization resistance & reasonable resistance to chemical agents. Meterial is readily available & low in cost. |
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Bonded Ferrite magnet is made from the mixture of bonded Ferrite magnet powder and synthetic rubber or plastic by extruding, calendaring or injecting method. It mainly includes rubber Ferrite magnet and plastic injection molded magnet. The rubber magnet has the characters of soft, flexible, and it is widely used in fridge, cupboard, stationery, advertisement and so on. The plastic magnet possesses better flexibility, and it can be inserted into metal and plastic parts easily. They are mainly used in Dc motor specification, meter motor, copyprinter, inductor, etc.
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Ferrite magnetic are sintered permanent magnets composed of Barium or Strontium Ferrite. This class of magnets, aside from good resistance to demagnetization, has the popular advantage of low cost. The corrosion resistance of Ferrite is considered “excellent”, and no surface treatments are required.
Ferrite magnets can be produced isotropically or anisotropically. Isotropic grades are not oriented and can be magnetized in any direction, although some degree of greater magnetic strength will be found in the pressing dimension, usually the shortest dimension. Anisotropic grades are oriented in the manufacturing direction, and must be magnetized in the direction of orientation.
Due to their low cost, Ferrite magnets enjoy a very wide range of applications, from motors and loudspeakers to toys and crafts, and are the most widely used permanent magnets today.
Ferrite magnets are very hard and brittle, and require specialized machining techniques. Moreover, they should be machined in an unmagnetized state.
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These industrial holding magnetic are units with an electromagnetic
holding system without an armature that is an open magnetic
circle for the holding of ferro magnetic parts.
The greatest holding force is dependant on the surface roughness
and component thickness.
Devices with permanent magnets and rectangular holding magnets are also available.
Size: 15 - 250 mm diameter
Max. holding force: 36 - 30000 N
(please note catalogue indications)
Rated torque: 1.4 - 90 W |
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Electromagnet is a type of magnet in which the magnetic field is produced by the flow of an electric current through the coil. The magnetic field disappears when the current ceases.
As a current is passed through the coil, small magnetic regions within the material, called magnetic domains, align with the applied field, causing the magnetic field strength to increase. As the current is increased, all of the domains eventually become aligned, a condition called saturation.
The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be rapidly manipulated over a wide range by controlling the amount of electric current. However, a continuous supply of electrical energy is required to maintain the field.
In applications where a variable magnetic field is not required, permanent magnets are generally superior. Additionally, permanent magnets can be manufactured to produce stronger fields than electromagnets of similar size.
Electromagnets are used in many situations where a rapidly or easily variable magnetic field is desired. Many of these applications involve deflection of charged particle beams; the cathode ray tube and manufacturers of mass spectrometer fall into this category.
Popular uses: linear motor, electric motor, circuit-breakers, electromagnet brakes, electromagnet clutches, metal lifter, industrial magnetic separators, and more. |
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Material Information
* Extensive Range of Anisotropic Ferrite (Ceramic) / NdFeB magnet set in mild steel housing, holding force can be reached 50Kgs.
* Internal or external threads for fastening and secure fixing.
* Supplied with a central tapped hole and a removable hook
* Standard finish in powder coated white; black & gray or galvanized Nickel or Zinc.
* Optional plastic can be filled to produce an even and protective surface.
* Have variety of uses including: Holding, securing, positioning, soldering, clamping and fixing applications. |
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The elobau programme offers a wide choice of OXID, AINiCo and SEKO industrial magnets which can be supplied with or without housings. The distances between the switch and the sensor to be used – depending on the application – can be set to almost any requirements.
All the plastic magnets are made here at elobau and, as a result, are available in any shape and size depending on customer needs. |
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Our range of equipment of MAGNETIC SEPARATION for the ferric particle purification (magnetic) that is in the processes of production like smeltings, cementeras, iron and steel industry, etc.; in the industry of recycling, nourishing, ceramic, brick, etc.; or also in the extraction of raw material like mines, quarries, etc.
Another important application is the protection of the machines that take part in the own production and that the ferric particles like shavings, nuts, screws, nails, etc. Can aggravate them.
All these processes require of elements that eliminate all the iron particles, being avoided therefore the delay or rejection in the production, obtaining a quality of the significant product.
All our equipment is made by means of PERMANENT MAGNETS constituting a safe and simple source since its installation does not depend on electricity. In addition, the quality of our product guarantees of by life the benefits of permanent magnets.
Our range of equipment of MAINTENANCE for the transport by means of magnetic systems that start up, they move and they deposit ferromagnetic pieces partial or completely. This displacement can be realized by means of a change of axis or level.
The principle of our systems of magnetic transport bases in the permanent magnet use that creates a magnetic field and generates the mobility of pieezas.
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This selection of magnetic equipment and components has a wide range of office and light industrial uses. These Specialty Magnets can help meet diverse product handling, processing and purity requirements. All items within this group are handled exclusively by Eriez of Canada.
Ceramic Magnets
Demagnetisers
Electromagnets - Small Flat-faced
Flexible Stripping
Fluid Line Professional filters
Magnetic Bases
Magnetic Claws and Multilifts
Magnetic Lifts - Permanent and Battery
Magnetic Rails
Magnets - Rare Earth
Permanent Magnetic chuck Repair
Permanent Magnets / Assemblies
Small Bi-Polar Magnets
Specialty Magnetic Manufacturer of sweepers |
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Magnets
