Abstract
The effect of hot isostatic pressing in 5°%,O 2 -95%Ar on the magnetic properties of Sr ferrite magnet was studied. It was found that the size of voids at grain boundaries are decreased by hot isostatic pressing without substantial grain growth and the density of isostatically hot-pressed body is about 5.03x10 3 kg/m 3 . Magnetic measurement revealed that the hot isostatic pressing does not signiticantly decrease coercive force and keeps the good squareness of B-H curve of pre-sintered body unchanged. The typical value of residual flux density Br of the isostatically hot-pressed magnet is 0.438T at MHe=318KA/m.
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