SINTERED NDFEB MAGNET




Sintered NdFeB magnets are prepared by the raw materials being melted in a furnace, cast into a mold and cooled to form ingots. The ingots are pulverized and milled; the powder is then sintered into dense blocks. The blocks are then heat-treated, cut to shape, surface treated and magnetized.

As of 2012, 50,000 tons of neodymium magnets are produced officially each year in China, and 80,000 tons in a "company-by-company" build-up done in 2013. China produces more than 95% of rare earth elements, and produces about 76% of the world's total rare-earth magnets.

Neodymium magnets are graded according to their maximum energy product, which relates to the magnetic flux output per unit volume. Higher values indicate stronger magnets and range from N35 up to N52. Letters following the grade indicate maximum operating temperatures (often the Curie temperature), which range from M (up to 100 °C) to EH (200 °C).

Sintered Nd2Fe14B tends to be vulnerable to corrosion, especially along grain boundaries of a sintered magnet. This type of corrosion can cause serious deterioration, including crumbling of a magnet into a powder of small magnetic particles, or spallingof a surface layer.
This vulnerability is addressed in many commercial products by adding a protective coating to prevent exposure to the atmosphere. Nickel plating or two-layered copper-nickel plating are the standard methods, although plating with other metals, or polymer and lacquer protective coatings are also in use.

Neodymium magnets have replaced alnico and ferrite magnets in many of the myriad applications in modern technology where strong permanent magnets are required, because their greater strength allows the use of smaller, lighter magnets for a given application. Some examples are:
Head actuators for computer hard disks
Magnetic resonance imaging (MRI)
Mechanical e-cigarette firing switches
Locks for doors
Loudspeakers and headphones
Magnetic bearings and couplings
Electric motors:
Cordless tools
Servomotors
Lifting and compressor motors
Synchronous motors
Spindle and stepper motors
Electrical power steering
Drive motors for hybrid and electric vehicles. The electric motors of each Toyota Prius require 1 kilogram (2.2 pounds) of neodymium.
Actuators
Electric generators for wind turbines (only those with permanent magnet excitation)
Direct-drive wind turbines require c. 600 kg of PM material per megawatt
Turbines using gears require less PM material per megawatt
Toys





N42 Sintered Ndfeb neodymium block magnets
N42 Sintered Ndfeb neodymium block magnets

N50 D30*10mm Rare earth neodymium big round magnet
N50 D30*10mm Rare earth neodymium big round magnet

Rare earth neodymium block magnet with holes
Rare earth neodymium block magnet with holes

N38M Strong sintered NdFeB block cube magnet
N38M Strong sintered NdFeB block cube magnet

Zinc coated Neodymium speaker ring magnet
Zinc coated Neodymium speaker ring magnet

Rare earth big neodymium bar magnet
Rare earth big neodymium bar magnet

N38 neodymium rare earth ring magnets
N38 neodymium rare earth ring magnets

N35 D40*20mm Neodymium Ndfeb big round magnet
N35 D40*20mm Neodymium Ndfeb big round magnet

N40 D40*5mm Ndfeb neodymium circular magnet
N40 D40*5mm Ndfeb neodymium circular magnet

N40 Ndfeb neodymium neo big ring magnet
N40 Ndfeb neodymium neo big ring magnet

Super Strong Disc Neodymium Speaker Magnet
Super Strong Disc Neodymium Speaker Magnet

Thin Sintered Neodym N35 Round Magnet
Thin Sintered Neodym N35 Round Magnet

Neodymium Disc Round Cylinder Rare Earth Magnet
Neodymium Disc Round Cylinder Rare Earth Magnet

N35 Round Neodymium Permanent Rare Earth Magnets
N35 Round Neodymium Permanent Rare Earth Magnets

Powerful Neodymium Arc Magnet for Motor
Powerful Neodymium Arc Magnet for Motor

35H Neodymium large ring magnet with holes
35H Neodymium large ring magnet with holes

35H Super strong permanent ring neodymium magnet
35H Super strong permanent ring neodymium magnet

Rare earth ring strong permanent speaker magnet
Rare earth ring strong permanent speaker magnet

Strong ring countersunk magnet for speaker magnet
Strong ring countersunk magnet for speaker magnet

N35H larger ring neodymium magnet with coating Zinc
N35H larger ring neodymium magnet with coating Zinc

N42SH neodymium rectangular block magnet
N42SH neodymium rectangular block magnet

N35 block neodymium cube magnet coating Nickel
N35 block neodymium cube magnet coating Nickel

Super strong permanent block magnet neodymium
Super strong permanent block magnet neodymium

Thin Rectangle neodymium magnet motor
Thin Rectangle neodymium magnet motor

Contact Info

CONTACT US

Jinyu Magnet (Ningbo) Co., Ltd.

Address: Cicheng Industrial District,Ningbo,Zhejiang

Contact Person: James Zhan

Phone:86-574-87472601

Fax:86-574-87405316

Full name Contact Phone Content
点击刷新验证码