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Two-phase composite permanent magnetic ferrite with exchange coupling effect and preparation method of two-phase composite permanent magnetic ferrite
The invention relates to the technical field of magnetic ferrites, in particular to a biphase composite permanent magnetic ferrite with an exchange coupling effect and a preparation method thereof. The preparation method comprises the steps: employing SrM ferrite powder obtained through a hydrothermal method and carbon nanospheres for preparing a porous SrM ferrite wafer, and preparing CoFe2O4 nanopowder obtained through the hydrothermal method into a magnetofluid solution; placing the porous SrM ferrite wafer in the CoFe2O4 magnetic fluid, and depositing the CoFe2O4 ferrite nano powder in the holes of the porous SrM ferrite under the assistance of a magnet; putting the compounded SrM/CoFe2O4 ferrite wafer into a crucible, then putting the crucible into a sintering furnace, carrying out high-temperature sintering according to a set heating program, after sintering is completed, cooling a sample to room temperature along with the furnace, and then taking out the sample to finally obtain the composite permanent magnetic ferrite block. According to the preparation method of the double-phase composite permanent magnetic ferrite with the exchange coupling effect, the problem that when the composite ferrite is prepared, holes are filled with a soft magnetic phase, and a uniform porous permanent magnetic phase structure is difficult to form is solved.
本发明涉及磁性铁氧体技术领域，具体涉及一种具有交换耦合作用的双相复合永磁铁氧体及其制备方法，首先利用水热法获得的SrM铁氧体粉末和纳米碳球制备多孔的SrM铁氧体圆片，再将水热法获得的CoFe2O4纳米粉末制备成磁流体溶液；将多孔SrM铁氧体圆片置于CoFe2O4磁流体中并在磁铁辅助下，将CoFe2O4铁氧体纳米粉末沉积在多孔SrM铁氧体的孔洞中。将复合后的SrM/CoFe2O4铁氧体圆片放入坩埚中，再置入烧结炉中按照设定的升温程序进行高温烧结，烧结完成之后，让样品随炉冷却至室温后取出，最终得到复合永磁铁氧体块体。这种具有交换耦合作用的双相复合永磁铁氧体的制备方法，解决了在制备复合铁氧体的时候将软磁性相填入孔洞、形成均匀的多孔永磁相结构较为困难的问题。
Two-phase composite permanent magnetic ferrite with exchange coupling effect and preparation method of two-phase composite permanent magnetic ferrite
The invention relates to the technical field of magnetic ferrites, in particular to a biphase composite permanent magnetic ferrite with an exchange coupling effect and a preparation method thereof. The preparation method comprises the steps: employing SrM ferrite powder obtained through a hydrothermal method and carbon nanospheres for preparing a porous SrM ferrite wafer, and preparing CoFe2O4 nanopowder obtained through the hydrothermal method into a magnetofluid solution; placing the porous SrM ferrite wafer in the CoFe2O4 magnetic fluid, and depositing the CoFe2O4 ferrite nano powder in the holes of the porous SrM ferrite under the assistance of a magnet; putting the compounded SrM/CoFe2O4 ferrite wafer into a crucible, then putting the crucible into a sintering furnace, carrying out high-temperature sintering according to a set heating program, after sintering is completed, cooling a sample to room temperature along with the furnace, and then taking out the sample to finally obtain the composite permanent magnetic ferrite block. According to the preparation method of the double-phase composite permanent magnetic ferrite with the exchange coupling effect, the problem that when the composite ferrite is prepared, holes are filled with a soft magnetic phase, and a uniform porous permanent magnetic phase structure is difficult to form is solved.
本发明涉及磁性铁氧体技术领域，具体涉及一种具有交换耦合作用的双相复合永磁铁氧体及其制备方法，首先利用水热法获得的SrM铁氧体粉末和纳米碳球制备多孔的SrM铁氧体圆片，再将水热法获得的CoFe2O4纳米粉末制备成磁流体溶液；将多孔SrM铁氧体圆片置于CoFe2O4磁流体中并在磁铁辅助下，将CoFe2O4铁氧体纳米粉末沉积在多孔SrM铁氧体的孔洞中。将复合后的SrM/CoFe2O4铁氧体圆片放入坩埚中，再置入烧结炉中按照设定的升温程序进行高温烧结，烧结完成之后，让样品随炉冷却至室温后取出，最终得到复合永磁铁氧体块体。这种具有交换耦合作用的双相复合永磁铁氧体的制备方法，解决了在制备复合铁氧体的时候将软磁性相填入孔洞、形成均匀的多孔永磁相结构较为困难的问题。
Two-phase composite permanent magnetic ferrite with exchange coupling effect and preparation method of two-phase composite permanent magnetic ferrite
一种具有交换耦合作用的双相复合永磁铁氧体及其制备方法
XIA AILIN (author) / ZHU XUESONG (author) / WANG FANGYU (author) / JIN CHUANGUI (author) / ZHANG HUIYAN (author) / LI HAILING (author) / LIU ZHIYUAN (author)
2021-06-04
Patent
Electronic Resource
Chinese
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