Scholarlink

<p>A low-temperature co-fired ceramic (LTCC) material based on Co-doped Li<sub>2</sub>Mg<sub>3</sub>TiO<sub>6</sub> (Li<sub>2</sub>Mg<sub>2.975</sub>Co<sub>0.025</sub>TiO<sub>6</sub>) with excellent microwave dielectric properties has been developed in this study. The effects of Li<sub>2</sub>O-B<sub>2</sub>O<sub>3</sub>-Bi<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> (LBBS) glass addition on the phase composition, microstructure, and dielectric properties of Li<sub>2</sub>Mg<sub>2.975</sub>Co<sub>0.025</sub>TiO<sub>6</sub> ceramics sintered at 900 °C were systematically investigated. Furthermore, CaTiO<sub>3</sub> was incorporated to tune the temperature coefficient of resonant frequency (τ<sub><i>f</i></sub>) to near-zero. The results indicate that the Li<sub>2</sub>Mg<sub>2.975</sub>Co<sub>0.025</sub>TiO<sub>6</sub> + 7 wt.% LBBS ceramic sintered at 900°C exhibits optimal comprehensive performance with a dielectric constant (<i>ε</i><sub>r</sub>) of 11.65, a quality factor (<i>Q</i> × <i>f</i>) of 53,599 GHz, and a τ<sub><i>f</i></sub> of − 30.1 ppm/<sup>o</sup>C. After optimization with 8 wt.% CaTiO<sub>3</sub> addition, the final ceramic composition (Li<sub>2</sub>Mg<sub>2.975</sub>Co<sub>0.025</sub>TiO<sub>6</sub> + 7 wt.% LBBS + 8 wt.% CaTiO<sub>3</sub>) achieves excellent dielectric properties: <i>ε</i><sub>r</sub> = 12.41, <i>Q</i> × <i>f</i> = 41,335 GHz, and τ<sub><i>f</i></sub> =  − 0.92 ppm/ <sup>o</sup>C. Chemical compatibility tests confirm that this ceramic material demonstrates outstanding compatibility with Ag electrodes, exhibiting no chemical reactions or element diffusion after co-firing. The developed ceramic material satisfies the processing temperature requirements for LTCC technology and possesses promising potential for application in microwave passive components.</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

LBBS glass-modified Li2Mg2.975Co0.025TiO6 microwave dielectric ceramics with near-zero temperature coefficient for LTCC applications

  • 期刊论文

  • 发表日期：

    2026年6月17日

查看全文
  • Lei Wang,
  • Guobin Zhu,
  • Zihang Wang,
  • Feng Qiao,
  • Hua Su

摘要

A low-temperature co-fired ceramic (LTCC) material based on Co-doped Li2Mg3TiO6 (Li2Mg2.975Co0.025TiO6) with excellent microwave dielectric properties has been developed in this study. The effects of Li2O-B2O3-Bi2O3-SiO2 (LBBS) glass addition on the phase composition, microstructure, and dielectric properties of Li2Mg2.975Co0.025TiO6 ceramics sintered at 900 °C were systematically investigated. Furthermore, CaTiO3 was incorporated to tune the temperature coefficient of resonant frequency (τf) to near-zero. The results indicate that the Li2Mg2.975Co0.025TiO6 + 7 wt.% LBBS ceramic sintered at 900°C exhibits optimal comprehensive performance with a dielectric constant (εr) of 11.65, a quality factor (Q × f) of 53,599 GHz, and a τf of − 30.1 ppm/oC. After optimization with 8 wt.% CaTiO3 addition, the final ceramic composition (Li2Mg2.975Co0.025TiO6 + 7 wt.% LBBS + 8 wt.% CaTiO3) achieves excellent dielectric properties: εr = 12.41, Q × f = 41,335 GHz, and τf =  − 0.92 ppm/ oC. Chemical compatibility tests confirm that this ceramic material demonstrates outstanding compatibility with Ag electrodes, exhibiting no chemical reactions or element diffusion after co-firing. The developed ceramic material satisfies the processing temperature requirements for LTCC technology and possesses promising potential for application in microwave passive components.