【摘要】 为获得爆轰合成过程中纳米氧化铈粒径的控制方法,采用乳化炸药爆轰法合成了纳米氧化铈粉末,研究了乳化炸药基质中水相液滴的尺寸对乳化炸药爆速和纳米氧化铈粒径的影响。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)和激光粒度仪,对不同乳化条件下得到的乳化炸药基质和相应的纳米氧化铈进行表征。结果表明,乳化炸药基质中水相液滴的尺寸对乳化炸药爆速和纳米氧化铈粒径均有较大的影响,乳化炸药基质中水相液滴的尺寸越小,相应的乳化炸药爆速越高,爆轰合成的纳米氧化铈的粒径越小,且粒径分布越均匀。更多还原

【Abstract】 In order to obtain the size-control method of nanostructured ceria during the process of detonation synthesis,the nanostructured ceria powder was synthesized by detonation method with emulsion explosives,and the effects on the detonation velocity of emulsion explosive and the diameter of nanostructured ceria particles exerted by the droplets size of hydrate phase in emulsion matrix were studied.The emulsion matrix was characterized with scanning electron microscope(SEM)and its corresponding nanostructured ceria was characterized with transmission electron microscope(TEM),X-ray diffraction(XRD)and laser particle analyzer.The results indicate that the droplets size of hydrate phase in emulsion matrix affects the detonation velocity of emulsion explosives and the diameter of nanostructured ceria particles significantly.It is beneficial to achieve nanostructured ceria with small diameter and uniform size by decreasing the droplets size of hydrate phase in emulsion matrix.更多还原