直接挤压 meaning in English

direct extrusion

When the two reactants were simply mixed by crush , they reacted violently and produced carbon spheres with a diameter of 50 - l00nm and sodium chloride ( nacl ) was encapsulated within the outer amorphous carbon shells , which could be confirmed by sem and tem . by annealing at 1400 ? to drive the encapsulated nacl away , hollow carbon spheres were left with a novel mesoporous structure , as presented in hrtem
实验中将两种反应物通过直接挤压混合后加热反应，得到的无定型球状碳材料经tem照片证实直径为50 - 100纳米，而且中间包裹氯化钠( nacl )颗粒； xrd等结果显示，高温退火并彻底清除nacl后形成的中空碳球已经部分石墨化。