Scholarlink

<p>Ba[(Zn<sub>0.6</sub>Mg<sub>0.4</sub>)<sub>1/3</sub>Nb<sub>(2-<i>x</i>)/3</sub>Sb<sub><i>x</i>/3</sub>]O<sub>3</sub> (BZMNS, <i>x</i> = 0.15, 0.2, 0.25, 0.3, 0.35) ceramics were synthesized by the conventional solid-state reaction method. The crystal structure and microwave dielectric properties of the ceramics were investigated. X-ray diffraction (XRD) analysis revealed that the BZMNS ceramics exhibit a cubic perovskite structure. The crystal structures were refined, and no secondary phases were detected in all compositions. The doping of Sb<sup>5+</sup> hinders grain growth, and the average grain size first increases and then decreases with the increase of the <i>x</i> value. The dielectric constant shows a downward trend due to the influence of the ionic bond character of B-site ions and the B-site Rattling effect. The packing fraction is the main factor affecting the <i>Q</i> × <i>f</i> value of BZMNS ceramics. As the <i>x</i> value increases, the temperature coefficient of the resonant frequency (<i>τ</i><sub><i>f</i></sub>) gradually decreases. Ion polarizability dilution is the primary mechanism for regulating <i>τ</i><sub><i>f</i></sub> of BZMNS ceramics. The BZMNS ceramics sintered at 1480&#xa0;°C with <i>x</i> = 0.3 exhibit optimal microwave dielectric properties (<i>ε</i><sub><i> r</i></sub>= 31.44, <i>Q</i> × <i>f</i> = 62,273&#xa0;GHz (at <i>f₀</i> = 6.5&#xa0;GHz), <i>τ</i><sub><i>f</i></sub> =  + 2.48&#xa0;ppm·°C<sup>−1</sup>), indicating that this ceramic has good application prospects.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The microwave dielectric properties of Ba[(Zn0.6Mg0.4)1/3Nb(2-x)/3Sbx/3]O3 perovskite ceramics

  • 期刊论文

  • 发表日期：

    2025年11月1日

查看全文
  • Shanshan Li,
  • Duo Zhang,
  • Zhongqing Tian,
  • Fei Wang,
  • Fancheng Meng

摘要

Ba[(Zn0.6Mg0.4)1/3Nb(2-x)/3Sbx/3]O3 (BZMNS, x = 0.15, 0.2, 0.25, 0.3, 0.35) ceramics were synthesized by the conventional solid-state reaction method. The crystal structure and microwave dielectric properties of the ceramics were investigated. X-ray diffraction (XRD) analysis revealed that the BZMNS ceramics exhibit a cubic perovskite structure. The crystal structures were refined, and no secondary phases were detected in all compositions. The doping of Sb5+ hinders grain growth, and the average grain size first increases and then decreases with the increase of the x value. The dielectric constant shows a downward trend due to the influence of the ionic bond character of B-site ions and the B-site Rattling effect. The packing fraction is the main factor affecting the Q × f value of BZMNS ceramics. As the x value increases, the temperature coefficient of the resonant frequency (τf) gradually decreases. Ion polarizability dilution is the primary mechanism for regulating τf of BZMNS ceramics. The BZMNS ceramics sintered at 1480 °C with x = 0.3 exhibit optimal microwave dielectric properties (ε r= 31.44, Q × f = 62,273 GHz (at f₀ = 6.5 GHz), τf =  + 2.48 ppm·°C−1), indicating that this ceramic has good application prospects.