宽温高磁导率软磁铁氧体材料RH15K的开发

采用传统氧化物陶瓷工艺制备锰锌铁氧体,研究了主配方的氧化铁含量、烧结工艺等因素对材料微观结构和磁导率的影响。结果表明,主配方氧化铁含量在52.2 mol%时,可以获得较好的磁导率温度特性;烧结温度1380℃,保温8~12 h,有助于提高起始磁导率;晶粒直径25μm左右和致密的微观结构,可提高材料的起始磁导率。通过优化配方和制备工艺,开发出了宽温、高磁导率锰锌铁氧体材料RH15K,性能如下:起始磁导率μi:15000±30%(25℃,10 k Hz),μi5000(-40℃,10 k Hz),居里温度TC105℃。

Development of soft ferrite material RH15K with high permeability in wide temperature

MnZn ferrites were prepared by conventional oxide ceramic method. The influence of content of iron oxide in main component and sintering process on the microstructure and permeability was investigated. The results indicates that good temperature dependence of permeability for iron oxide content of 52.2 mol%; sintering at 1380℃ for 8 to 12 hours resulted in good grain size of 25μm and compact microstructure, which can improve initial permeability. MnZn ferrite material RH15K was developed with high permeability in wide temperature range as a result of optimization of main component and sintering process. The performance is as follows: initial permeabilityμi:15000±30 % (25℃,10 kHz),μi>5000 (-40℃, 10 kHz),Curie temperatureTC>105℃.