摘要：采用柠檬酸盐溶胶-凝胶法制备尖晶石型铁氧体粉体,通过扫描电子显微镜和粒度分析仪表征产物的粒径大小,研究烧结温度和升温速率对铁氧体粒径的影响。结果表明:多步升温的方式更有利于形成粒径小且均匀的铁氧体粉体,得到的产物粒径约为300 nm;随着烧结温度的升高,铁氧体颗粒的粒径呈先减小后增大的趋势,850℃为最佳烧结温度,适用于制备颗粒均匀、粒径小的尖晶石型铁氧体粉体。

关键词：铁氧体；粒度；烧结温度；升温速率

Abstract： Spinel ferrite powders were prepared by citrate sol-gel method. The influence of sintering temperature and heating rate on particle size of ferrite was characterized by SEM and particle size analyzer. The results show that the multi-step temperature programmed mode is propitious to form ferrite powders with small size and high uniformity. The particle size of the product is about 300 nm. With the increase of temperature, the granularity of spinel ferrite decreases and then increases. The best sintering temperature is 850 ℃. It is suggested that multi-step heating is suitable for preparation of spinel ferrite powders with fine granularity and small particle size. 

Keywords: ferrite; granularity； sintering temperature； heating rate