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<p>Dielectric ceramics are urgently demanded with low dielectric loss, high breakdown strength and low-temperature sinterability for advanced applications. In this work, a series of <i>x</i>BaCuSi<sub>4</sub>O<sub>10</sub>–(1−<i>x</i>)BaCu<sub>2</sub>Si<sub>2</sub>O<sub>7</sub> (<i>x</i> = 0, 0.3, 0.5, 0.7, 1) ceramics were synthesized via conventional solid-state reaction, and the optimal composition was further modified by LiF, LBSCA glass and BaCuB<sub>2</sub>O<sub>5</sub> (BCB) for low-temperature sintering on the <i>x</i> = 0.5 composition. By introducing composite sintering additives, the sintering temperature is effectively reduced to 810–930&#xa0;℃; among them, the 2 wt % LiF + 1 wt % LBSCA (2F1G) sample sintered at 830&#xa0;℃ shows homogeneous grain growth, high densification and significantly improved dielectric breakdown strength from 35.4 to 66.2&#xa0;kV/mm. The low-temperature sintering characteristic and enhanced breakdown strength make this ceramic system a promising candidate for high-performance insulating dielectric applications.</p>

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Dielectric properties and breakdown behavior of low-temperature sintering ceramics in BaO–CuO–SiO2 system

  • 期刊论文

  • 发表日期：

    2026年5月17日

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  • Hebin Sun,
  • Hui Li,
  • Chaoyou Zhao,
  • Yunfei Zhou,
  • Chenshan Wang,
  • Xin Wu,
  • Decai Yan

摘要

Dielectric ceramics are urgently demanded with low dielectric loss, high breakdown strength and low-temperature sinterability for advanced applications. In this work, a series of xBaCuSi4O10–(1−x)BaCu2Si2O7 (x = 0, 0.3, 0.5, 0.7, 1) ceramics were synthesized via conventional solid-state reaction, and the optimal composition was further modified by LiF, LBSCA glass and BaCuB2O5 (BCB) for low-temperature sintering on the x = 0.5 composition. By introducing composite sintering additives, the sintering temperature is effectively reduced to 810–930 ℃; among them, the 2 wt % LiF + 1 wt % LBSCA (2F1G) sample sintered at 830 ℃ shows homogeneous grain growth, high densification and significantly improved dielectric breakdown strength from 35.4 to 66.2 kV/mm. The low-temperature sintering characteristic and enhanced breakdown strength make this ceramic system a promising candidate for high-performance insulating dielectric applications.