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<p>Refractory high-titanium slag (HTS) can be used directly as an alternative raw material for producing inorganic functional materials without prior separation of Ti and Fe. In this study, a composite material of SrTiO<sub>3</sub> (STO)-TiFe<sub>2</sub>O<sub>5</sub>/SrFe<sub>12</sub>O<sub>19</sub> (TFO/SFO) with excellent electromagnetic performance was prepared via HTS by oxidation sintering in air. The reaction behaviors of Fe<sub>2</sub>O<sub>3</sub>-SrCO<sub>3</sub>, TiO<sub>2</sub>-SrCO<sub>3</sub>, and TiO<sub>2</sub>-Fe<sub>2</sub>O<sub>3</sub>-SrCO<sub>3</sub> systems were also compared to determine the formation mechanism of STO and TFO/SFO. We showed that the STO exhibits promising EM wave-absorbing performance, achieving a minimum reflection loss (RL) of − 31.14&#xa0;dB at 15.23&#xa0;GHz with 6.0&#xa0;mm thickness. As Fe<sub>2</sub>O<sub>3</sub> was introduced into the TiO<sub>2</sub>-SrCO<sub>3</sub> system, a small amount of TFO/SFO formed around the STO phase, thereby improving the magnetic properties and optimizing impedance matching. SF predominantly relies on magnetic loss mechanisms for electromagnetic wave absorption, whereas STO is primarily governed by dielectric loss. Therefore, the STO–TFO/SFO composite material exhibited improved saturation magnetization (24.03&#xa0;emu/g) and superior absorption performance, reaching a minimum RL of − 34.53&#xa0;dB at 13.43&#xa0;GHz. This study develops a feasible, value-added strategy for the material utilization of Ti-rich industrial by-products in EM wave-absorbing applications.</p>

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Electromagnetic Wave-Absorbing Strontium Titanate Preparation from High Titanium Slag (HTS): Oxidation Sintering Mechanism of TiO2-Fe2O3-SrCO3 System

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Bingbing Liu,
  • Zhenyu Wang,
  • Long Peng,
  • Yao Huang,
  • Jun Yang

摘要

Refractory high-titanium slag (HTS) can be used directly as an alternative raw material for producing inorganic functional materials without prior separation of Ti and Fe. In this study, a composite material of SrTiO3 (STO)-TiFe2O5/SrFe12O19 (TFO/SFO) with excellent electromagnetic performance was prepared via HTS by oxidation sintering in air. The reaction behaviors of Fe2O3-SrCO3, TiO2-SrCO3, and TiO2-Fe2O3-SrCO3 systems were also compared to determine the formation mechanism of STO and TFO/SFO. We showed that the STO exhibits promising EM wave-absorbing performance, achieving a minimum reflection loss (RL) of − 31.14 dB at 15.23 GHz with 6.0 mm thickness. As Fe2O3 was introduced into the TiO2-SrCO3 system, a small amount of TFO/SFO formed around the STO phase, thereby improving the magnetic properties and optimizing impedance matching. SF predominantly relies on magnetic loss mechanisms for electromagnetic wave absorption, whereas STO is primarily governed by dielectric loss. Therefore, the STO–TFO/SFO composite material exhibited improved saturation magnetization (24.03 emu/g) and superior absorption performance, reaching a minimum RL of − 34.53 dB at 13.43 GHz. This study develops a feasible, value-added strategy for the material utilization of Ti-rich industrial by-products in EM wave-absorbing applications.