摘要
采用草酸盐低温固相合成法制备了FeZn复合草酸盐前驱体,经过真空450℃煅烧,获得了具有特殊性能的微晶ZnFe2O4铁氧体粉体和材料。由X射线衍射、扫描电镜对产物进行结构分析表明:粉体粒度分布均匀,颗粒呈球形,平均粒径约为40nm。对样品的电磁特性测试表明:该复合氧化物在室温呈现超顺磁性,在高频带有较大的损耗系数,达到0.7,是高频条件下理想的磁性吸波材料。
A nanocrystalline ferrite material ZnFe2O4 with special properties was prepared by calcining at 450°C in a vacuum and using Fe-Zn complex oxalates as precursor, which were synthesized from oxalate by low temperature solid-state reaction. Results of X-ray diffraction and scanning electron microscope analysis show that the particles of powder are round, and have a uniform size distribution averaging about 40 nm. Results of the electromagnetic properties test show that this complex oxide demonstrates super-paramagnetism in room temperature, and has greater loss tangent (0.7) at the high frequency band, which proves it is an ideal magnetic wave absorbing material.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第6期665-668,共4页
Journal of The Chinese Ceramic Society
关键词
固相反应
微晶铁氧体
吸波材料
Calcination
Dielectric losses
Electromagnetic wave absorption
Nanostructured materials
Phase composition
Superparamagnetism
