Scholarlink

<p>ZrO<sub>2</sub>-substituted (Mg<sub>1/6</sub>Nb<sub>1/3</sub>)Ti<sub>0.5</sub>O<sub>2</sub> ceramics, formulated as (Mg<sub>1/6</sub>Nb<sub>1/3</sub>)Ti<sub>(0.5−<i>x</i>)</sub>Zr<sub><i>x</i></sub>O<sub>2</sub> (MNZ<sub><i>x</i></sub>T<sub>(0.5−<i>x</i>)</sub>, <i>x</i> = 0–0.20), were synthesized using conventional solid-state reaction to investigate their sintering behavior, crystal structure, and microwave dielectric properties. X-ray diffraction (XRD) analysis revealed a rutile-type phase (space group <i>P</i>4<sub>2</sub>/<i>mnm</i>) for <i>x</i> = 0, which gradually transformed into an orthorhombic phase (space group <i>Pbcn</i>) with increasing ZrO<sub>2</sub> content, completing the transition at <i>x</i> = 0.16. This study complements the ZrO<sub>2</sub>-TiO<sub>2</sub>-MgNb<sub>2</sub>O<sub>6</sub> ternary ceramic system and provides an effective strategy for tuning the dielectric properties of (Mg<sub>1/6</sub>Nb<sub>1/3</sub>)Ti<sub>0.5</sub>O<sub>2</sub>-based ceramics. Moreover, the sample with <i>x</i> = 0.13, sintered at 1250°C for 3&#xa0;h, exhibited excellent microwave dielectric properties, including <i>ε</i><sub><i>r</i></sub> = 39, <i>Q</i>×<i>f</i> = 34,000&#xa0;GHz (at 6.285&#xa0;GHz), and <i>τ</i><sub><i>f</i></sub> = −5&#xa0;ppm/°C, which were attributed to improved densification and phase stability. In particular, the (Mg<sub>1/6</sub>Nb<sub>1/3</sub>)Ti<sub>0.37</sub>Zr<sub>0.13</sub>O<sub>2</sub> ceramic dielectric resonator antenna fabricated at 1250°C for 3&#xa0;h resonated at 6.65&#xa0;GHz (S11 = −33.4&#xa0;dB) with a bandwidth of 170&#xa0;MHz, demonstrating it as a potential candidate for millimeter-wave communication applications.</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

Sintering Behavior, Crystal Structure, and Microwave Dielectric Properties of ZrO2-Substituted (Mg1/6Nb1/3)Ti0.5O2 Ceramics

  • 期刊论文

  • 发表日期：

    2026年5月14日

查看全文
  • Yujie Li,
  • Zhen Xie,
  • Zefeng Jiang,
  • Jiahua Zhu,
  • Hao Xue,
  • Zhangzhao Weng

摘要

ZrO2-substituted (Mg1/6Nb1/3)Ti0.5O2 ceramics, formulated as (Mg1/6Nb1/3)Ti(0.5−x)ZrxO2 (MNZxT(0.5−x), x = 0–0.20), were synthesized using conventional solid-state reaction to investigate their sintering behavior, crystal structure, and microwave dielectric properties. X-ray diffraction (XRD) analysis revealed a rutile-type phase (space group P42/mnm) for x = 0, which gradually transformed into an orthorhombic phase (space group Pbcn) with increasing ZrO2 content, completing the transition at x = 0.16. This study complements the ZrO2-TiO2-MgNb2O6 ternary ceramic system and provides an effective strategy for tuning the dielectric properties of (Mg1/6Nb1/3)Ti0.5O2-based ceramics. Moreover, the sample with x = 0.13, sintered at 1250°C for 3 h, exhibited excellent microwave dielectric properties, including εr = 39, Q×f = 34,000 GHz (at 6.285 GHz), and τf = −5 ppm/°C, which were attributed to improved densification and phase stability. In particular, the (Mg1/6Nb1/3)Ti0.37Zr0.13O2 ceramic dielectric resonator antenna fabricated at 1250°C for 3 h resonated at 6.65 GHz (S11 = −33.4 dB) with a bandwidth of 170 MHz, demonstrating it as a potential candidate for millimeter-wave communication applications.