Abstract: In order to study the application of emulsion explosives in synthesizing nanosized ceria，emulsion explosives，in which Ce(NO3)3?6H2O and NH4NO3 acted as the main oxidant，were prepared by detonation method. The detonation velocity of emulsion explosives with different content of Ce(NO3)3?6H2O was measured. Their exothermal character was tested by Differential Scanning Calorimeter(DSC). Results indicated that the detonation velocity of emulsion explosives was significantly affected by the content of Ce(NO3)3?6H2O and the content was suggested to be no more than 50% for emulsion explosives in detonation synthesis. The heat output and the exothermic rate of emulsion base depended on the content of Ce(NO3)3?6H2O in emulsion explosives，which should be kept within 30%—50% in detonation synthesis. The content of Ce(NO3)3?6H2O in emulsion explosives was 40%，the nano ceria size was about 70nm，and crystal form was cubic.

Key words: emulsion explosives, detonation velocity, DSC, detonation synthesis, ceria

摘要： 为研究乳化炸药在爆轰合成纳米氧化铈中的应用，研制了以硝酸铈和硝酸铵为主要氧化剂的乳化炸药。对不同硝酸铈含量的乳化炸药爆速进行了测试，并利用差示扫描量热仪研究了不同硝酸铈含量的乳化炸药基质的放热特性。研究结果表明，硝酸铈含量对乳化炸药的爆速具有显著影响，同时也决定了乳化基质的放热量和放热速率，用于爆轰合成的硝酸铈质量分数以30%～50%为宜。利用硝酸铈质量分数为40%的乳化炸药，采用爆轰法得到了粒径为70 nm、晶型为立方晶系的纳米氧化铈。

关键词: 乳化炸药, 爆速, 差示扫描量热, 爆轰合成, 氧化铈