Method for producing a sintered magnet and sintered magnet

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According to an exemplary embodiment of the present invention, a manufacturing method of a magnesium alloy plate includes : preparing NdFeB-based powders by using a reduction-diffusion method; mixing the NdFeB-based powders and rare-earth hydride powders; heat-treating the mixture at a temperature of 600 to 850 °C; and sintering the heat-treated mixture at a temperature of 1000 to 1100 °C, wherein the rare earth hydride powders are NdH2powders or mixed powers of NdH2and PrH2.