Design and verification of a high bandwidth metamaterial based on daily ceramics and its thermal conductivity

Abstract

Abstract High temperature resistant metamaterial absorbers with broadband and high performance is a promising research field. At present, many reported absorbing materials have the defects of single absorption mechanism, temperature sensitivity, and low temperature resistance. To expand the high-temperature performancs, a daily ceramics-based metamaterial absorber was proposed and verified. The absorption band was excited by the local surface plasma polarization (LSP) mode and the surface plasma polarization (SPP) mode resonance between disk arrays, and the dielectric loss mode resonance of the ceramic substrate. The effects of structural parameters, temperature, preparation process, and type of ceramic substrate on the absorption properties of the metamaterial were measured. The measurement results show that the metamaterial absorber is obvious temperature stability. The absorption band was strengthened by increasing the thickness of the ceramic substrate and the diameter of the disk array. The average value of absorption band was less affected by the preparation technology of daily ceramic substrate. The average absorption based on four preparation technologies (Chemical vapor deposition, Microwave induced synthesis, Sol-gel method, Carbothermal reduction method) are: 0.861, 0.882, 0.857, and 0.842, respectively. The average absorption based on four daily ceramics (SiC, ZrSiO 4 , TmFeO 3 , and ZrSnTiO) were: 0.861, 0.776, 0.908, and 0.857, respectively. In addition, the thermal conductivity and thermal resistance of daily ceramics were important parameters to measure the thermal resonance performance of the ceramic-based metamaterial absorber. The results confirmed the effect of ceramic on the thermal conductivities (thermal response current, thermal resistance and thermal conductivity). Therefore, the proposed daily ceramic-based metamaterial absorber has the following advantages: absorption is temperature-independent, and the high temperature metamaterial is capable of excellent heat conductivity.