非连续体吸波平板的设计制备及吸波机理分析  

Design and theory analysis of a discrete slab absorber

作　　者：段玉平[1] 刘顺华[1] 管洪涛[1] 温斌[1] 王桂芹[1] 

机构地区：[1]大连理工大学材料科学与工程学院,大连116023

出　　处：《复合材料学报》2006年第3期37-43,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金资助项目(50402025)

摘　　要：通过吸波体内导电媒质的“孤岛”化设计，制备了单层非连续体平板吸波材料，并分析了不同炭黑含量和不同试样厚度对吸波效能的影响以及电磁波的损耗机理。发现随着CB／ABS颗粒中炭黑含量和试样厚度的增加，在8～18GHz频段内，非连续体试样的反射损耗增加。当炭黑质量含量达到30％时，平板的反射损耗在8．5～18GHz宽频范围内都超过-10dB，在15～18GHz均高于-15dB。当试样厚度达到20mm时，其反射损耗在8～18GHz频率范围内超过-15dB。结果表明，非连续体试样较热压致密试样吸波效能有较大提高，是很有潜力的吸波结构。A single-layer absorber structure containing randomly distributed discrete macro-inclusions was designed by isolating the conductive medium in the absorbing matrix, and the effects of carbon black （CB） content and sample thickness on the reflection loss as well as microwave loss mechanism were analyzed. The test results show that, with increasing the carbon black content of the discrete particles in the slab absorber, the reflection loss increases in a frequency range of 8-18 GHz. When the mass fraction of CB gets to 30%, the reflection loss was above - 10dB in 8.5-18 GHz and above - 15 dB in 15-18 GHz. Especially, when the thickness of the discrete slab absorber reaches 20 mm, the reflection loss was above - 15 dB in 8-18 GHz. The results indicate that the discrete structure exhibits the optimum absorptivity in 8 - 18 GHz compared with that of the compact sample, and it is a potential excellent absorber.

关 键 词：吸波 非连续 平板 孤岛 散射 

分 类 号：TB34[一般工业技术—材料科学与工程]