摘要
利用溶胶 凝胶自蔓延高温合成法制备了稀土镧掺杂钡铁氧体BaLaxFe12 -xO19超微粉末。讨论了起始溶液pH值、柠檬酸配比、煅烧温度等对粉末性能参数的影响。用X射线衍射仪、扫描电子显微镜和振动样品磁强计等对粉末的结构、形貌和磁学性能进行了研究。
The hexagonal BaLa x Fe 12- x O 19 fine powders with M type structure were synthesized by sol gel method. The pH of the solution, the molar ratio of nitrate/citric acid and calcination temperature were investigated to clarify the forming conditions of the ferrites. The crystal structure, grain size,morphology and magnetic properties were studied by means of XRD, SEM and vibrating sample magnetometer. It is concluded that at the condition of pH 7.0 or so, nitrate/citric acid molar ratio of 1∶3 and calcination temperature of 850℃(1h)+1000℃,the M type BaLa x Fe 12- x O 19 fine powders with a particle size of less than 300 nm can be obtained.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2001年第2期86-89,共4页
Chinese Journal of Rare Metals
