Editing Magnet (section)

=== Composites ===
[[File:Ceramic magnets.jpg|thumb|A stack of [[ferrite magnet]]s]]

Ceramic, or [[ferrite (magnet)|ferrite]], magnets are made of a [[sintered]] [[alloy|composite]] of powdered iron oxide and [[Barium carbonate|barium]]/[[strontium carbonate]] [[ceramic]]. Given the low cost of the materials and manufacturing methods, inexpensive magnets (or non-magnetized ferromagnetic cores, for use in [[electronic component]]s such as [[Antenna (radio)#Loop|portable AM radio antennas]]) of various shapes can be easily mass-produced. The resulting magnets are non-corroding but [[brittle]] and must be treated like other ceramics.

[[Alnico]] magnets are made by [[casting (metalworking)|casting]] or [[sintering]] a combination of [[aluminium]], [[nickel]] and [[cobalt]] with [[iron]] and small amounts of other elements added to enhance the properties of the magnet. Sintering offers superior mechanical characteristics, whereas casting delivers higher magnetic fields and allows for the design of intricate shapes. Alnico magnets resist corrosion and have physical properties more forgiving than ferrite, but not quite as desirable as a metal. Trade names for alloys in this family include: ''Alni, Alcomax, Hycomax, Columax'', and ''Ticonal''.<ref>{{cite book | last = Brady | first = George Stuart | author2 = Henry R. Clauser | author3 = John A. Vaccari | title = Materials Handbook: An Encyclopedia for Managers | publisher = McGraw-Hill Professional | year = 2002 | page = 577 | url = https://books.google.com/books?id=vIhvSQLhhMEC&pg=PA577 | isbn = 0-07-136076-X | url-status = live | archive-url = https://web.archive.org/web/20161224181108/https://books.google.com/books?id=vIhvSQLhhMEC&pg=PA577 | archive-date = 2016-12-24 }}</ref>

[[Injection molding|Injection-molded]] magnets are a [[mixture|composite]] of various types of [[resin]] and magnetic powders, allowing parts of complex shapes to be manufactured by injection molding. The physical and magnetic properties of the product depend on the raw materials, but are generally lower in magnetic strength and resemble [[plastic]]s in their physical properties.