Cold and hot shock resistant low-loss manganese-zinc power ferrite magnetic core and preparation method thereof

The invention discloses a low-loss manganese-zinc power ferrite magnetic core resistant to hot and cold impact, which is prepared by the following steps: 1) preparing a completely spinel pre-sintered material through burdening, mixing, pre-sintering and pre-sintered material quenching treatment; (2) drying the pre-sintered material, carrying out vibration milling, adding an auxiliary additive according to a ratio, and respectively carrying out sanding and liquid medium settling separation to obtain mixed slurry with uniformly distributed granularity; the preparation method comprises the following steps of 1, preparing a mixed slurry, 2, adding a PVA solution into the mixed slurry according to a certain ratio, and carrying out centrifugal spray granulation to obtain finished granules, 4, pressing the finished granules into a magnetic core blank, and 5, sintering the magnetic core into the blank to obtain the low-loss manganese-zinc power ferrite magnetic core resistant to hot and cold impact. 本发明公开了一种抗冷热冲击低损耗锰