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.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 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
2024
-
03
-
29
Click on the number of times:
0
source:phys.orgThe emergence of ultrafast laser pulse generation, marking a significant milestone in laser science, has triggered incredible progress across a wide array of disciplines, encompassing i...
2024
-
03
-
29
Click on the number of times:
0
source:stockheadANSTO testing proves the REE mineralisation at Viridis’ Colossus project is of the all-important ionic adsorption clay varietyTesting with cheap salt solution (AMSUL), at pH4 and room ...
2024
-
03
-
26
Click on the number of times:
0
source:resource worldE-Tech Resources Inc. [TSXV-REE; FSE-K2I] reported the successful completion of its trenching and sampling program at the Eureka project in Namibia. The program revealed significa...
2024
-
03
-
25
Click on the number of times:
0
source:phys.orgCerium is a rare Earth metal that has numerous technological applications, for example, in some types of lightbulbs and flat-screen TVs. While the element is rare in Earth's crust, ...