高分子磁体/ TiO<sub>2</sub>复合缩波材料的电磁性能

高分子磁体/ TiO₂复合缩波材料的电磁性能

摘要: 研究了在100 MHz～1800 MHz 的高频、微波下, 高分子磁体/ TiO₂( 简称OPM/ TiO₂ ) 复合缩波材料的电磁参数变化。研究表明: 丙烯酸改性的OPM/ TiO₂ 复合缩波材料有效地提高其介电常数, 降低介电损耗和磁损耗,而⁶⁰Co-r 辐照的OPM/ TiO₂ 材料却显著地提高其磁导率及介电常数, 但材料的磁损耗和介电损耗基本不变, 因此,OPM/ TiO₂ 作为一种用于缩小电子器件及天线几何尺寸的复合缩波材料, 对高频, 微波通信、宇航和计算机有重要的理论和应用价值。

Abstract: The variation of electromagnetic parameters of the polymer magnet/ TiO₂( i. e. OPM/TiO₂ ) composite compactwave materials was studied in VHF and microwave frequency band at 100 MHz to 1800MHz. The results show that the OPM/ TiO₂ modified by acrylic acid has a higher dielectric constant as well as lower dielectric loss and magnetic loss. The magnetic conductivity ( u′) and dielectric constant (X′) were remarkably raised for OPM/ TiO₂ irradiated by cobalt-60 radiation, but its magnetic loss and dielectric loss have not changed basically. Thus, the OPM/TiO₂ , as a good compactwave material, is of great value both in theory and in practice for the VHF and microwave communication, space science, computer and so on.