Abstract

A 28 GHz microwave heating method was used to react an Fe2O3+ Y2O3 powder mixture to form yttrium iron garnet (YIG, Y3Fe5O12) powder. The minimum temperature to form YIG was lower than the conventional (external) heating method. YIG began to form after only 70 s of irradiation, which means that the solid‐state reaction proceeded very rapidly. The amounts of byproducts were controlled by the starting composition and by the Y2O3 particle size. The resultant YIG particle size also was controlled by the Y2O3 particle size.

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