| 简介 |
PROBLEM TO BE SOLVED : To provide a rare earth bond magnet having a small demagnetization property with respect to a temperature change and a high physical heat resistance.
SOLUTION : A rare earth bond magnet comprises : rare earth-iron based magnet powder; and a thermosetting resin composition. The thermosetting resin composition includes : a main agent containing a first epoxy resin which is a multifunction epoxy resin and has a glass transition point of 200°C or higher after curing as a result of a reaction with a hardening agent, and a second epoxy resin which is a straight-chain epoxy resin and has a glass transition point of 120°C or lower after curing as a result of a reaction with the hardening agent; and the hardening agent. The proportion of the first epoxy resin and the second epoxy resin blended in the main agent is set so that the thermosetting resin composition has a glass transition point of 150°C or higher and an elastic modulus of 65 GPa or smaller.
SELECTED DRAWING : None
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