最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

The SHS agglomerate power was made by grinding Al, Ni and Co powers with vesicant and adhesive. The Ni-Al-Co composite hollow microspheres were prepared by a self-propagating synthesis flame spraying quenching method. The microstructure and crystal structure of the hollow sphere power were studied by SEM, EDS and XRD. The results show that the spheres have hollow structure. At the high temperature of the oxyacetylene flame, the SHS reaction of the agglomerate is ignited. So the synthesized product becomes droplets. At the same time some gas is generated from vesicant so that the droplets become bubbles. The hollow droplets are injected into cold water and solidified to hollow microspheres. The permittivity and permeability were analyzed by a vector network analyzer. The microwave absorbing properties of the microspheres are good at band 6 GHz.