Synthesis of nano-CeO2 powder by detonation method
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摘要: 爆轰合成过程中采用Ce(NO3)3·6H2O制备的可爆药剂，并利用X射线衍射仪(XRD)和透射电子显微镜(TEM)对合成的纳米CeO2粉末进行了检测，研究了起爆方式对于合成产物结晶化度、粒径和形貌的影响。结果表明，采用Ce(NO3)3·6H2O制备的可爆药剂，可以合成立方晶系的球形纳米CeO2; 提高可爆药剂的爆速，可有效降低纳米CeO2的粒径，得到球形化更好的纳米粒子。Abstract: The blasting agentwas prepared by choosing Ce(NO3)3·6H2O as themajor ingredient to synthesize nano-CeO2 powder by the detonation method.The as-synthesized productswere characterized by X-ray diffraction(XRD)and transmission electron microscopy(TEM).Thereby, the influences of the initiation manners on the crystallization, particle size andmorphology of the as-synthesized productswere analyzed.The results indicate that CeO2spherical nano-particleswhose crystal structure belongs to cubic system can be synthesized by using the blasting agent in which Ce(NO3)3·6H2O acting as themajor ingredient.And it is an effectivemethod to decrease the particle size and improve the spherification of nano-CeO2 by increasing the detonation velocity of the blasting agent.
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Key words:
- mechanics of explosion /
- nano-CeO2 powder /
- detonation synthesis /
- blasting agent /
- cubic system /
- Ce(NO3)3·6H2O /
- XRD /
- TEM
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表 1 混合炸药及爆轰产物的热化学参数[17]
Table 1. Thermochemistry parameters of mixed explosives and detonation products[17]
分子式 M/(g·mol-1) ΔHm/(kJ·mol-1) Ce(NO3)3·6H2O 434 -3 062.4 NH4NO3 80 -353.5 C18H38 254 -558.0 C24H44O6 428 -1 333.9 CeO2 172 -1 089.9 H2O(g) 18 -241.8 CO2 44 -393.5 CO 28 -110.5 N2 28 0 
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