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<p>In this paper, the solid-state sintering method was employed to prepare Li<sub>2</sub>ZnTi<sub>3</sub>O<sub>8</sub> + <i>x</i> wt% TiO<sub>2</sub> whiskers (<i>x</i> = 0.00, 0.25, 0.50, 0.75, 1.00) ceramics. The influences of TiO<sub>2</sub> whiskers doping on the crystal structure, microwave dielectric properties and flexural strength were explored. According to the experimental findings, a little bit of doping fails to influence the phase structure and the TiO<sub>2</sub> whiskers dissolve into the Li<sub>2</sub>ZnTi<sub>3</sub>O<sub>8</sub> lattice, forming a stable solid solution with the ceramics. TiO<sub>2</sub> whiskers rod-like structures can also effectively deflect micro-cracks. Moreover, TiO<sub>2</sub> whiskers can reduce the sintering temperature while increasing the flexural strength and improving the microwave dielectric properties. Among them, the Li<sub>2</sub>ZnTi<sub>3</sub>O<sub>8</sub> + 0.5 wt% TiO<sub>2</sub> whiskers ceramic sintered at 1000&#xa0;°C exhibits the optimal performance with σ = 192&#xa0;MPa, <i>ε</i><sub><i>r</i></sub> = 23.8, <i>Q</i> × <i>f</i> = 71,921&#xa0;GHz, and <i>τ</i><sub><i>f</i></sub> = −&#xa0;16.1&#xa0;ppm/°C. This endows it with practical value and development potential in the realm of microwave device design, positioning it as a promising material.</p>

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Improvement of microwave dielectric properties and flexural strength of Li2ZnTi3O8 ceramics by adding TiO2(w) as reinforcing phase

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Danni Bu,
  • Yaqi Xiao,
  • Yang Liu,
  • Fangyi Huang,
  • Xiuli Chen,
  • Huanfu Zhou

摘要

In this paper, the solid-state sintering method was employed to prepare Li2ZnTi3O8 + x wt% TiO2 whiskers (x = 0.00, 0.25, 0.50, 0.75, 1.00) ceramics. The influences of TiO2 whiskers doping on the crystal structure, microwave dielectric properties and flexural strength were explored. According to the experimental findings, a little bit of doping fails to influence the phase structure and the TiO2 whiskers dissolve into the Li2ZnTi3O8 lattice, forming a stable solid solution with the ceramics. TiO2 whiskers rod-like structures can also effectively deflect micro-cracks. Moreover, TiO2 whiskers can reduce the sintering temperature while increasing the flexural strength and improving the microwave dielectric properties. Among them, the Li2ZnTi3O8 + 0.5 wt% TiO2 whiskers ceramic sintered at 1000 °C exhibits the optimal performance with σ = 192 MPa, εr = 23.8, Q × f = 71,921 GHz, and τf = − 16.1 ppm/°C. This endows it with practical value and development potential in the realm of microwave device design, positioning it as a promising material.