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<p>Synthesis and characterization was carried out for cobalt–titanium oxide perovskite samples doped with zinc. The samples were processed using the mechanical milling method with high-energy milling in wet conditions and continued heat treatment at 1000°C for 5&#xa0;h. Characterization performed included x-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and microwave absorption in the S-band. The Co<sub>1−<i>x</i></sub>Zn<sub><i>x</i></sub>TiO<sub>3</sub> samples (<i>x</i> = 0.1 and 0.2) are single-phase (Co, Zn)TiO<sub>3</sub>, while <i>x</i> = 0.3 resulted in a second phase, namely Zn<sub>2</sub>TiO<sub>4</sub>. The particle size also increased with increasing Zn<sup>2+</sup> dopant ions. All samples were paramagnetic, with susceptibility decreasing with increasing Zn<sup>2+</sup> ions. The Co<sub>0.9</sub>Zn<sub>0.1</sub>TiO<sub>3</sub> sample has a high dielectric loss tangent. With the ability to absorb microwaves at a frequency of 2–4&#xa0;GHz, the best results were achieved by the Co<sub>0.9</sub>Zn<sub>0.1</sub>TiO<sub>3</sub> sample, namely −34.87&#xa0;dB at a frequency of 2.16&#xa0;GHz, with a bandwidth of around 0.5&#xa0;GHz.</p>

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The High Dielectric Loss Tangent of Zinc-Doped Cobalt Titanate and Its Correlation with Microwave Absorption Performance in the S-Band Frequency

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Yohanes Edi Gunanto,
  • Jan Setiawan,
  • Yunasfi Yunasfi,
  • Nanang Sudrajat,
  • Maya Puspitasari Izaak,
  • Henni Sitompul,
  • Yana Taryana,
  • Ramlan Ramlan,
  • Wisnu Ari Adi

摘要

Synthesis and characterization was carried out for cobalt–titanium oxide perovskite samples doped with zinc. The samples were processed using the mechanical milling method with high-energy milling in wet conditions and continued heat treatment at 1000°C for 5 h. Characterization performed included x-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and microwave absorption in the S-band. The Co1−xZnxTiO3 samples (x = 0.1 and 0.2) are single-phase (Co, Zn)TiO3, while x = 0.3 resulted in a second phase, namely Zn2TiO4. The particle size also increased with increasing Zn2+ dopant ions. All samples were paramagnetic, with susceptibility decreasing with increasing Zn2+ ions. The Co0.9Zn0.1TiO3 sample has a high dielectric loss tangent. With the ability to absorb microwaves at a frequency of 2–4 GHz, the best results were achieved by the Co0.9Zn0.1TiO3 sample, namely −34.87 dB at a frequency of 2.16 GHz, with a bandwidth of around 0.5 GHz.