EM wave absorbers prepared with sendust

To develop new materials for broad-band EM wave absorbers is very important, thus we fabricated EM wave absorbers with sendust and investigated their EM wave absorption. Also, the effect of Al(OH)/sub 3/ coating on the sendust was investigated. Band-width of absorption and central frequencies increase with increasing Al(OH)/sub 3/ coating amount. Thus, we conclude that the Al(OH)/sub 3/ coating on sendusts is a useful method to increase absorption band-width.