Given the huge and increasing global demand for permanent magnet supply, even slight improvements of the magnetic properties and cost effectiveness of permanent magnet materials could incur huge energy and money savings. This article is concerned with the optimization of the experimental conditions for the production of pure M-type Ba x Sr 1− x Fe 12 O 19 hexaferrites with improved magnetic properties. X-ray diffraction analysis revealed the formation of a single M-type hexaferrite in the ball milling route at a sintering temperature of 1100 °C for the samples with x = 0.0 and 0.5, and at 1200 °C for x = 1.0. In the sol–gel route, however, a single M-type phase was successfully synthesized at a significantly lower temperature of 890 °C. The magnetic parameters of the samples prepared by ball milling exhibited an improvement at lower Ba contents. On the other hand, the samples prepared by sol–gel method exhibited ...

中文翻译：

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球磨和溶胶-凝胶法制备Ba x Sr 1− x Fe 12 O 19铁氧体永磁体的比较研究

鉴于全球对永磁体供应的巨大且不断增长的需求，即使永磁体材料的磁性能和成本效益略有改善，也可能会节省大量能源和金钱。本文涉及优化生产具有改善的磁性的纯M型Ba x Sr 1-x Fe 12 O 19六价铁氧体的实验条件的优化。X射线衍射分析显示，对于x = 0.0和0.5的样品，在球磨过程中，烧结温度为1100°C时，会形成单个M型六方铁氧体；对于x = 1.0的样品，在1200°C时，会形成单个M型六方铁氧体。然而，在溶胶-凝胶法中，仅在890°C的较低温度下成功合成了一个M型相。通过球磨制备的样品的磁参数在较低的Ba含量下表现出改善。