We fabricated metallic granular metacomposites by low-temperature pressureless sintering. A percolation behavior appears, corresponding to the observation of metal-like conductivity and epsilon-negative. Weakly epsilon-negative property is achieved in 70 wt% FeCrNi/CaCu₃Ti₄O₁₂ metacomposites, showing small absolute value of epsilon between 0 and −150. The epsilon-negative property is tuned by adjusting metal content in metacomposites and high negative value of real permittivity (∼−10⁴) is achieved. The superposition of Lorentz and Drude model explains the radio-frequency (RF) epsilon-negative. Epsilon-negative property correlates with inductive character as investigated by equivalent circuit analysis. Our work benefits the practical applications of epsilon-negative property in electromagnetic fields.

我们通过低温无压烧结制造了金属粒状复合材料。出现渗流行为，对应于观察到的类似金属的电导率和 epsilon 负值。在 70 wt% FeCrNi/CaCu ₃ Ti ₄ O ₁₂元复合材料中实现了弱 epsilon 负特性，表明 epsilon 的绝对值在 0 和 -150 之间很小。通过调整元复合材料中的金属含量和实际介电常数的高负值（~-10 ⁴） 已完成。洛伦兹和德鲁德模型的叠加解释了射频 (RF) epsilon-negative。由等效电路分析研究的 Epsilon 负特性与电感特性相关。我们的工作有益于 epsilon 负特性在电磁场中的实际应用。