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<p>The rapid advancement of high-frequency, miniaturized, and high-efficiency electronic technologies has imposed stringent requirements on magnetic materials, particularly concerning performance stability across frequency and temperature. In this study, strontium titanate SrTiO<sub>3</sub> (STO), a dielectric material, was introduced as an additive into MnZn ferrites to reduce power loss (<i>P</i><sub>cv</sub>) under high-frequency and wide-temperature conditions. Experimental results demonstrate that STO addition significantly reduces <i>P</i><sub>cv</sub> at 1&#xa0;MHz and 30 mT, with the 300&#xa0;ppm STO-added sample achieving an exceptionally low <i>P</i><sub>cv</sub> of 184 mW/cm<sup>3</sup> at room temperature (20&#xa0;°C). This improvement is attributed to microstructural refinement and enhanced resistivity, which suppresses eddy current loss while maintaining low hysteresis loss. Furthermore, the STO-added MnZn ferrites exhibit excellent wide-temperature stability, maintaining <i>P</i><sub>cv</sub> below 225 mW/cm<sup>3</sup> across the range of -20&#xa0;°C to 100&#xa0;°C. These findings indicate that STO addition provides a cost-effective and practical approach to high-frequency and wide-temperature performance for MnZn ferrites, offering both scientific insight and industrial potential for mass production of low-loss magnetic cores.</p>

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Perovskite-type SrTiO3 addition for low-loss MnZn ferrites with good frequency and temperature stability

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Jiang Hong,
  • Mengrui Li,
  • Guibing Shi,
  • Wenju Liao,
  • Shichao Wu,
  • Konglei Zhu,
  • Tao Liu,
  • Huabin Chen

摘要

The rapid advancement of high-frequency, miniaturized, and high-efficiency electronic technologies has imposed stringent requirements on magnetic materials, particularly concerning performance stability across frequency and temperature. In this study, strontium titanate SrTiO3 (STO), a dielectric material, was introduced as an additive into MnZn ferrites to reduce power loss (Pcv) under high-frequency and wide-temperature conditions. Experimental results demonstrate that STO addition significantly reduces Pcv at 1 MHz and 30 mT, with the 300 ppm STO-added sample achieving an exceptionally low Pcv of 184 mW/cm3 at room temperature (20 °C). This improvement is attributed to microstructural refinement and enhanced resistivity, which suppresses eddy current loss while maintaining low hysteresis loss. Furthermore, the STO-added MnZn ferrites exhibit excellent wide-temperature stability, maintaining Pcv below 225 mW/cm3 across the range of -20 °C to 100 °C. These findings indicate that STO addition provides a cost-effective and practical approach to high-frequency and wide-temperature performance for MnZn ferrites, offering both scientific insight and industrial potential for mass production of low-loss magnetic cores.