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Preparation method of hexagonal SrFe12O19 ferrite-based composite permanent magnetic ferrite
The invention discloses a preparation method of hexagonal SrFe12O19 ferrite-based composite permanent magnetic ferrite, relates to the technical field of preparation of permanent magnetic ferrite, and aims to solve the problem that an existing ferrite preparation method cannot meet production requirements. The preparation method comprises the following steps: preparing SrFe12O19 ferrite powder and CoFe2O4 or (Ni, Zn) Fe2O4 nanocrystal ferrite powder by adopting a chemical coprecipitation method; the method specifically comprises the following steps: respectively preparing aqueous solutions by taking analytically pure metal nitrate and NaOH as raw materials, dropwise adding the prepared sodium hydroxide solution into a nitrate solution while stirring, and continuously stirring under a heating condition until the reaction is sufficient; cleaning the obtained powder until the pH value is neutral, and then drying; uniformly grinding the dried powder, pressing and calcining; grinding the prepared SrFe12O19 ferrite, mixing the ground SrFe12O19 ferrite with CoFe2O4 or (Ni, Zn) Fe2O4 ferrite powder, grinding, uniformly mixing, pressing and sintering to obtain the composite ferrite with a soft and hard magnetic phase exchange coupling effect; the method is simple, low in cost, good in product performance and suitable for large-scale industrial production and application.
本发明公开了一种六角SrFe12O19铁氧体基复合永磁铁氧体的制备方法，涉及永磁铁氧体的制备技术领域，为解决现有的铁氧体制备方法不能满足生产需要的问题；本发明包括采用化学共沉淀法制备SrFe12O19铁氧体粉末，以及CoFe2O4或(Ni,Zn)Fe2O4纳米晶粒铁氧体粉末；具体为以分析纯金属硝酸盐和NaOH为原料分别配置水溶液，边搅拌边将配置的氢氧化钠溶液滴加到硝酸盐溶液中，在加热条件下继续搅拌至反应充分；所得粉末清洗至pH值中性后干燥；将干燥的粉末研磨均匀，压制后煅烧；将制得的SrFe12O19铁氧体磨细后，与CoFe2O4或(Ni,Zn)Fe2O4铁氧体粉末混合后研磨混匀并压制烧结，获得具有软、硬磁相交换耦合作用的复合铁氧体；本发明方法简单、成本较低，产品性能较佳，适合于大规模工业化生产应用。
Preparation method of hexagonal SrFe12O19 ferrite-based composite permanent magnetic ferrite
The invention discloses a preparation method of hexagonal SrFe12O19 ferrite-based composite permanent magnetic ferrite, relates to the technical field of preparation of permanent magnetic ferrite, and aims to solve the problem that an existing ferrite preparation method cannot meet production requirements. The preparation method comprises the following steps: preparing SrFe12O19 ferrite powder and CoFe2O4 or (Ni, Zn) Fe2O4 nanocrystal ferrite powder by adopting a chemical coprecipitation method; the method specifically comprises the following steps: respectively preparing aqueous solutions by taking analytically pure metal nitrate and NaOH as raw materials, dropwise adding the prepared sodium hydroxide solution into a nitrate solution while stirring, and continuously stirring under a heating condition until the reaction is sufficient; cleaning the obtained powder until the pH value is neutral, and then drying; uniformly grinding the dried powder, pressing and calcining; grinding the prepared SrFe12O19 ferrite, mixing the ground SrFe12O19 ferrite with CoFe2O4 or (Ni, Zn) Fe2O4 ferrite powder, grinding, uniformly mixing, pressing and sintering to obtain the composite ferrite with a soft and hard magnetic phase exchange coupling effect; the method is simple, low in cost, good in product performance and suitable for large-scale industrial production and application.
本发明公开了一种六角SrFe12O19铁氧体基复合永磁铁氧体的制备方法，涉及永磁铁氧体的制备技术领域，为解决现有的铁氧体制备方法不能满足生产需要的问题；本发明包括采用化学共沉淀法制备SrFe12O19铁氧体粉末，以及CoFe2O4或(Ni,Zn)Fe2O4纳米晶粒铁氧体粉末；具体为以分析纯金属硝酸盐和NaOH为原料分别配置水溶液，边搅拌边将配置的氢氧化钠溶液滴加到硝酸盐溶液中，在加热条件下继续搅拌至反应充分；所得粉末清洗至pH值中性后干燥；将干燥的粉末研磨均匀，压制后煅烧；将制得的SrFe12O19铁氧体磨细后，与CoFe2O4或(Ni,Zn)Fe2O4铁氧体粉末混合后研磨混匀并压制烧结，获得具有软、硬磁相交换耦合作用的复合铁氧体；本发明方法简单、成本较低，产品性能较佳，适合于大规模工业化生产应用。
Preparation method of hexagonal SrFe12O19 ferrite-based composite permanent magnetic ferrite
一种六角SrFe12O19铁氧体基复合永磁铁氧体的制备方法
XIA AILIN (author) / ZHANG SHUANG (author) / JI JIAOJIAO (author) / ZHANG HUIYAN (author) / LI HAILING (author) / LIU ZHIYUAN (author) / JIN CHUANGUI (author)
2022-11-04
Patent
Electronic Resource
Chinese
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