News News
Contact us
  • Customer service number:64321087
  • Commercial service telephone:13918059423
  • Technical service telephone:13918059423
  • Contact person: Mr. Cui 
  • Service email:shxtb@163.com
  • Address: room 107, building 8, no. 100, guilin road, xuhui district, Shanghai

Powering the World with Magnets

The date of: 2022-08-04
viewed: 2
source:energyindustryreview


One of the most amazing phenomena of nature is the manifestation of magnetism in some materials. Permanent magnets are known since ancient times. Before the great discoveries in the field of electricity, permanent magnets were actively used by physicians. Over time, people learned to create artificial magnets by placing iron alloy products in magnetic fields. Permanent magnets are frequently used in industry, in various fields, such as electrical engineering, computer technologies, transportation, navigation, medicine, biology, astronomy etc. The main application of magnets is in electrical engineering, radio engineering, instrumentation, automation and tele-mechanics. For example, without magnetic materials, electrification would be impossible because generators, transformers for power transmission, and speakers for electric motors, telephones, radios, and televisions would be used for power generation.
The active introduction of permanent magnets in the sphere of human activity stimulates inventing and creating new ferromagnetic alloys with improved magnetic characteristics.
Pure magnetic metals
Iron, cobalt, nickel, gadolinium – only these four metals are pure and magnetic at ambient temperature. This property is called ferromagnetism. All rare earths alloys used industrially for permanent magnets contain these metals.
However, there are 9 metals that have strong magnetic properties, being able to be attracted by magnets and they themselves are able to become magnets: iron, cobalt, nickel, but also gadolinium, terbium, dysprosium, holmium, erbium, thulium. Aluminium, platinum, chromium, titanium, vanadium, manganese are very weakly attracted by magnet. They magnetize so little that it is impossible to detect their magnetic properties without special tools.
Ferromagnetic metals
Ferromagnetic metals are strongly attracted by objects with magnetic fields and can keep their magnetic properties after the magnet is removed from them. They are used to create permanent magnets. The main ferromagnetic metals are iron, nickel, cobalt, gadolinium, and dysprosium. If a piece of ferromagnetic metal is held next to a magnet, a strong enough attraction will be felt.



Hot News / Related to recommend
  • 2025 - 04 - 01
    Click on the number of times: 0
    source:Hebrew University of JerusalemResearchers have discovered an unexpected superconducting transition in extremely thin films of niobium diselenide (NbSe2). Publishing in Nature Communications, th...
  • 2025 - 03 - 31
    Click on the number of times: 0
    source:resourceworldBrazilian Rare Earths Limited [ASX: BRE] reported results of exploration drilling at the Pelé Target 1 Project, located in Bahia, Brazil.The Pelé Project is hosted within...
  • 2025 - 03 - 28
    Click on the number of times: 0
    source:SMALL CAPSEquinox Resources (ASX: EQN) has recorded high-grade heavy minerals content at its Mata da Corda rare earths project in Brazil.Notably, the company’s initial metallurgical results hav...
  • 2025 - 03 - 27
    Click on the number of times: 16
    source:TOHOKU UNIVERSITYPhotoluminescent materials are more than just the glow-in-the-dark stars your parents glued to your bedroom ceiling as a child. Photoluminescent materials are widely used in ap...
  • Copyright ©Copyright 2018 2020 Shanghai rare earth association All Rights Reserved Shanghai ICP NO.2020034223
    the host:Shanghai Association of Rare Earth the guide:Shanghai Development and Application Office of Rare Earth the organizer:Shanghai rare earth industry promotion center
    犀牛云提供云计算服务