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What is alnico?

  It is used as a magnet of the speaker unit with alnico magnet [Alnico magnet] (alnico magnet). It is replaced by a cheap ferrite magnet now though it was a magnet of the main current until the mid 20th century. Cobalt soars to the reason one of the raw materials. The scarcity value becomes high very much now, and it is used only for the high-level speaker unit.

  Alnico is an alloy to which iron (fe), aluminum (al), nickel (ni), and cobalt (co) are assumed to be a principal ingredient by the one having been put out by the GE Co. in the United States. The advantage said that it will ask to have a very high magnetic energy and residual flux density is and there is a fault that it is not easy to process it while it is, too.

  The opinion greatly divides between the manias whether the evolution of a present ferrite system magnet is also large and which into is good though only four characters "Alnico" enter and the price of the speaker unit jumps up to about ten times.