爆轰合成碳包覆钴、镍磁性纳米颗粒的探索

 介绍了爆轰法合成碳包覆钴、镍纳米磁性颗粒研究的初步结果。以黑索今炸药为主体，加入钴、镍金属硝酸盐与有机碳源材料，在爆炸容器中氮气保护下用导爆管雷管引爆，成功地合成了碳包覆钴、镍纳米磁性颗粒。为了探求爆轰固体产物的形貌特征及性能，分别采用了TEM、XRD、VSM等测试手段对其进行表征。实验结果表明，爆轰产物中主要含有碳包覆纳米钴、纳米镍磁性颗粒，成球体或者椭球体，具有完好的核壳结构形貌。合成的碳包覆钴颗粒分布在30~50 nm之间，碳包覆的镍颗粒分布在25~60 nm之间，外层碳壳层主要由无定形碳和石墨构成。磁性测试表明，所得碳包金属钴、镍颗粒在室温下具有良好的软磁特性。

Detonation Synthesis of Carbon Encapsulated Cobalt/Nickel Nanoparticles

Carbon encapsulated cobalt and nickel magnetic nanoparticles have been synthesized successfully via detonation technique under nitrogen gas in explosion vessel. The gelatine dynamics are mainly made up of RDX explosive, mixed with nitrate cobalt or nitrate nickel, some orgnatic carbon materials at a proportion. Some testing methods such as XRD,TEM,VSM were carried out on the detonation soots, so as to characterize their morphology and properities. The results of experiments showed that the detonation products consisted of carbon encapsulated cobalt and nickel nanomaterials,with the perfect core-shell structure. The size of carbon encapsulated cobalt particles distributed between 30 and 50 nm,and the grain of carbon encapsulated nickel nanoparticles was 25～60 nm. At room temperature, they exhibited good soft magnetism.