爆轰法制备微米级球形氧化铈

Preparation of micro-size spherical ceria by detonation method

以Ce(NO3)3·3H2O和黑索金(RDX)为原料,探索了爆轰合成方法制备氧化铈,实验获得了灰白色氧化铈粉末。采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对氧化铈粉末进行了表征,研究了混合炸药中Ce(NO3)3·3H2O质量分数对氧化铈晶粒粒径的影响。XRD结果表明,得到的氧化铈为立方晶系。SEM图表明,氧化铈晶粒具有规则的球形外观,且具有较好的分散性。混合炸药中Ce(NO3)3·3H2O质量分数对氧化铈晶粒的平均粒径具有显著影响。混合炸药中Ce(NO3)3·3H2O质量分数越高,其对应的氧化铈晶粒平均粒径越大。当混合炸药中Ce(NO3)3·3H2O质量分数由15%增加到60%时,氧化铈的粒径相应地由2.2μm增加至4.6μm。

Ceria is synthesized by detonation method with Ce(NO3)3·3H2O and RDX,ceria powder of off-white appearance is obtained.The ceria powder is characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM).The effect of the content of Ce(NO3)3·3H2O in the composite explosives on the size of ceria grain is discussed.XRD patterns show that the ceria is of cubic crystal structure.The SEM pictures present that the ceria grain has regularly spherical appearance and better dispersity.The content of Ce(NO3)3·3H2O in the composite explosives has significant effect on the size of ceria grain.The higher the contents of Ce(NO3)3·3H2O in the composite explosives are,the largger the cerium oxide particles diameters are.The size of cerium oxide increases from 2.2 μm to 4.6 μm as the content of Ce(NO3)3·3H2O in the composite explosives increasing from 15% to 60%.