反相胶束微乳液法制备氧化钇纳米微晶

Preparation of Nanocrystalline Y_2O_3 in Reverse Micelles and Microemulsions

利用反相胶束微乳液形成的“微反应器”制备出单分散性好,粒度小于30um的氧化钇纳米微晶.探讨了正丁醇的加入量对微囊膜稳定性的影响,寻找到最佳的正丁醇加入量.利用TEM和XRD研究了煅烧温度对产物形貌的影响,发现随着温度升高,粒度变大.

Monodisperse nanocrystalline Y2O3 in size < 30 um was prepared in 'microreactors' of reverse micelles and microemulsions, formed from cetyltrimethyl ammonium bromide, butanol and Y(NO3 )3 in cyclohexane. The mechanism of the crystalline formation has been discussed based on the results of TG-DTA, XRD and TEM measurements. The addition of butanol showed a great influence on the stability of the microreactor membrane. The optimum content of butanol was found. The size of Y2O3 depended on the calcination temperature: the higher the temperature, the larger the nanocrystalline.