摘要
利用滴定水解法制备了Fe_3O_4纳米颗粒,经XRD和漫反射吸收谱分析,Fe_3O_4晶粒粒径约为18nm,从紫外至近红外(200～3000nm)均有很强的光吸收。纳米Fe_3O_4有明显的负磁阻和湿敏效应,其阻抗随磁感应强度和湿度的增大而减小。
The Fe3O4 magnetic nano-particles prepared by the titration hydrolyzation method were studied with X-ray diffration(XRD), UV-Vis diffusive reflectance spectrum(DRS), Magnetoresistance measurement and digital bridge LCR. The results show that the Pe(3)O(4) magnetic particles have strong absorptions in the rang from 250nm to 3000mn; the average diameter of the Fe3O4 nano-particles is about 18nm. The Fe3O4 granular film has obvious negative magnetoresistivity effect and humidity sensitive character. The impedance of the Fe3O4 nano-particles decreases with increasing magnetic induction and humidity respectively.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期929-932,共4页
Journal of Inorganic Materials
基金
国家自然科学基金(20133010
20073007
20273014)
福建省自然科学基金(A0010014
D002003)
福建省教育厅重点项目(JA02138)
福州大学科技发展基金(XKJ(QD)-0105)
关键词
滴定水解法
磁阻
纳米颗粒
湿敏特性
titration hydrolyzation method
magnetoresistivity effect
nano-particles
humidity sensitive character
