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Disc NdFeB Permanent Magnets Ø90 x 30mm N48, Sintered Neodymium Customized Disc Craft Magnet, Powerful Rare Earth Permanent Disk Magnet, Buy Super Strong Bulk Huge NdFeB Round Neodymium Disc Magnets China Supplier & Factory
Disc NdFeB Permanent Magnets Ø90 x 30mm N48 Feature:
Plating Nickle (Ni-Cu-Ni)
Diameter D 90 mm
Volum 190852 mm³
Temperature max. 80 °C
Magnetic Grade N48
Tolerance 0.1 mm
Weight 1,450473 kg
Pull Power Force 260,000 kg
Hight H 30 mm
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 degrees Celsius) to EH (200 degrees Celsius).
Grades of Neodymium magnets:
Some important properties used to compare permanent magnets are: remanence (Br), which measures the strength of the magnetic field, coercivity (Hci); the material’s resistance to becoming demagnetized, energy product (BHmax), the density of magnetic energy, and Curie temperature (TC), the temperature at which the material loses its magnetism. Neodymium magnets have higher remanence, much higher coercivity and energy product, but often lower Curie temperature than other types. Neodymium is alloyed with terbium and dysprosium in order to preserve its magnetic properties at high temperatures. The table below compares the magnetic performance of neodymium magnets with other types of permanent magnets. custom disc magnet neodymium, round magnet neodymium, neodymium permanent round magnet, high strength neodymium magnet round, strong ndfeb magnet disc
In addition, the greater strength of neodymium magnets has inspired new applications in areas where magnets were not used before, such as magnetic jewelry clasps, children’s magnetic building sets (and other neodymium magnet toys) and as part of the closing mechanism of modern sport parachute equipment. They also are the main metal in the formerly popular desk-toy magnets, “Buckyballs”, though some retailers have chosen not to sell them due to child-safety concerns.
The strength and magnetic field homogeneity on neodymium magnets has also opened new applications in the medical field with the introduction of open magnetic resonance imaging (MRI) scanners used to image the body in radiology departments as an alternative to superconducting magnets that use a coil of superconducting wire to produce the magnetic field.
Neodymium magnets are used as a surgically placed anti-reflux system which is a band of magnets surgically implanted around the lower esophagael sphincter to treat gastroesophageal reflux disease (GERD).
|Material||Remanence||Coercivity||Energy product||Maximum temperature|
|N48||13.7-14.2||1.37-1.42||10.8-12.5||860-995||≥ 12||≥ 955||45-48||358-382||≤ 80|