Microwave absorbing materials have been widely in stealth technology and in electro-magnetic compatibility (EMC) technology, and they are researching hotspot in these technology field. In most of absorbers, the ferrite and metal powder are the main components because of good performance and low cost. But the defect of high density is not benefit for the preparation of light absorber. In response to the need for high performance absorber, in this paper, the composite-coating absorbers with hollow cenosphere ...