摘要
采用硝酸铁、硝酸锌、柠檬酸制备前驱体，在不同加热温度与速率下制备锌铁氧体。用X射线衍射、原子力显微镜及网络分析仪研究了产物的结构组成、颗粒形貌及复介电常数与磁导率。研究表明：以60℃／h加热速率缓慢升温至650℃，保温1h得到结晶度良好的尖晶石型锌铁氧体ZnFe2O4，平均粒径为23nm。快速升温不利于形成尖晶石相。采用聚合物乳液作基材制备锌铁氧体涂层，在5～12GHZ频率（C、X波段）内，微波反射损失大于10dB，具有良好的吸波性能。
The citrate sol-gel synthesis method has been used to prepare zinc ferrite. The precursors were obtained from iron nitrite, zinc nitrate and citric acid and then calcined with high and low heating rate respectively. The crystal style, grain size, complex permittivity, permeability and microwave absorption of the production were tested by X-ray diffraction （ XRD ）, atomic force microscope （ AFM ） and network analyzer. The results show that the spinel phase ZnFe2O4 could be obtained by this process at 650℃ for 1 h with 60℃/h heating rate and the average grain size of powder was 23nm. Microwave absorber coating of zinc ferrite was made with latex matrix and the reflection loss was more than 10dB in frequency C and X band.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2006年第4期504-507,共4页
Journal of Materials Science and Engineering
基金
上海市科委纳米资助项目(0352nm041)
上海市科委纳米资助项目(0552nm029)
关键词
锌铁氧体
纳米晶粒
微波吸收
zinc ferrite
nanopowder
microwave absorption
