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Manganese-zinc soft magnetic ferrite core and sintering method and application thereof
The invention discloses a manganese-zinc soft magnetic ferrite core and a sintering method and application thereof. The sintering method of the manganese-zinc soft magnetic ferrite magnetic core comprises the steps of powder preparation, compression molding and sintering, and the sintering treatment comprises the following steps: S1, a heating stage: in a nitrogen and oxygen mixed gas atmosphere, keeping the temperature of the manganese-zinc soft magnetic ferrite magnetic core at the endothermic peak characteristic temperature for 55-65 minutes, then heating to 1100 DEG C, densifying to 1200 DEG C, and keeping the temperature for 10-20 minutes; then, the temperature is continuously increased to 1245 DEG C to 1255 DEG C; s2, a heat preservation stage, wherein sintering molding is conducted under the condition of 1245-1255 DEG C; and S3, a cooling stage: when the temperature is reduced to 1195-1205 DEG C, carrying out heat preservation treatment for 30-120 minutes, and when the temperature is continuously reduced to 1155-1165 DEG C, carrying out heat preservation treatment for 60-120 minutes. The sintering method not only can regulate and control the proportion of Fe < 2 + > and Fe < 3 + > in the soft magnetic ferrite to reduce high-temperature loss, but also can improve the growth uniformity of crystal grains to form crystal grains with relatively small sizes, and can also reduce pores and out-phase, thereby reducing the loss of the manganese-zinc soft magnetic ferrite core under the conditions of-20-140 DEG C and 100-400 KHz.
本发明公开了一种锰锌软磁铁氧体磁芯及其烧结方法和应用。本发明锰锌软磁铁氧体磁芯的烧结方法包括粉料、压制成型和烧结，所述烧结处理包括以下步骤：S1.升温阶段：在氮气和氧气混合气体气氛中，将锰锌软磁铁氧体磁芯在其吸热峰特征温度下保温55～65min，然后升温至1100℃时开始致密化至1200℃，再继续升温至1245～1255℃；S2.保温阶段：在1245～1255℃条件下烧结成型；S3.降温阶段：温度降低至1195～1205℃时保温处理30～120min，继续降低至1155～1165℃时保温处理60～120min。该烧结方法不仅能够调控软磁铁氧体中Fe2+与Fe3+的比例来降低高温损耗，还可以改善晶粒生长均匀性、形成尺寸相对较小的晶粒，同时还可以减少气孔以及异相，从而降低锰锌软磁铁氧体磁芯在‑20～140℃、100～400KHz条件下的损耗。
Manganese-zinc soft magnetic ferrite core and sintering method and application thereof
The invention discloses a manganese-zinc soft magnetic ferrite core and a sintering method and application thereof. The sintering method of the manganese-zinc soft magnetic ferrite magnetic core comprises the steps of powder preparation, compression molding and sintering, and the sintering treatment comprises the following steps: S1, a heating stage: in a nitrogen and oxygen mixed gas atmosphere, keeping the temperature of the manganese-zinc soft magnetic ferrite magnetic core at the endothermic peak characteristic temperature for 55-65 minutes, then heating to 1100 DEG C, densifying to 1200 DEG C, and keeping the temperature for 10-20 minutes; then, the temperature is continuously increased to 1245 DEG C to 1255 DEG C; s2, a heat preservation stage, wherein sintering molding is conducted under the condition of 1245-1255 DEG C; and S3, a cooling stage: when the temperature is reduced to 1195-1205 DEG C, carrying out heat preservation treatment for 30-120 minutes, and when the temperature is continuously reduced to 1155-1165 DEG C, carrying out heat preservation treatment for 60-120 minutes. The sintering method not only can regulate and control the proportion of Fe < 2 + > and Fe < 3 + > in the soft magnetic ferrite to reduce high-temperature loss, but also can improve the growth uniformity of crystal grains to form crystal grains with relatively small sizes, and can also reduce pores and out-phase, thereby reducing the loss of the manganese-zinc soft magnetic ferrite core under the conditions of-20-140 DEG C and 100-400 KHz.
本发明公开了一种锰锌软磁铁氧体磁芯及其烧结方法和应用。本发明锰锌软磁铁氧体磁芯的烧结方法包括粉料、压制成型和烧结，所述烧结处理包括以下步骤：S1.升温阶段：在氮气和氧气混合气体气氛中，将锰锌软磁铁氧体磁芯在其吸热峰特征温度下保温55～65min，然后升温至1100℃时开始致密化至1200℃，再继续升温至1245～1255℃；S2.保温阶段：在1245～1255℃条件下烧结成型；S3.降温阶段：温度降低至1195～1205℃时保温处理30～120min，继续降低至1155～1165℃时保温处理60～120min。该烧结方法不仅能够调控软磁铁氧体中Fe2+与Fe3+的比例来降低高温损耗，还可以改善晶粒生长均匀性、形成尺寸相对较小的晶粒，同时还可以减少气孔以及异相，从而降低锰锌软磁铁氧体磁芯在‑20～140℃、100～400KHz条件下的损耗。
Manganese-zinc soft magnetic ferrite core and sintering method and application thereof
一种锰锌软磁铁氧体磁芯及其烧结方法和应用
ZHANG KAI (author) / BAI YINSHENG (author) / KONG LINGCAI (author) / XIE ZHENHUA (author) / CHEN CHUANGXIN (author) / LU YANJIANG (author) / TAN XIANGBIN (author)
2024-04-05
Patent
Electronic Resource
Chinese
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