摘要
对采用柠檬酸溶胶–凝胶法和共沉淀法两种方法制备的钡铁氧体粒子进行了对比,采用原位聚合的方法合成了聚苯胺/钡铁氧体复合材料.用X射线衍射仪、扫描电子显微镜、四探针测试仪、振动样品磁强计对产物的结构和性能进行了表征和测试.实验结果显示,柠檬酸溶胶-凝胶法所制得的产物主要为钡铁氧体,纯度较高.钡铁氧体结构主要为M型六角晶系片状结构,平均粒径在20～60 μm.电磁测试结果显示,钡铁氧体的比饱和磁化强度与矫顽力均随焙烧时间的延长呈上升趋势,随着时间从3 h延长到5 h,比饱和磁化强度从36.9 emu/g增加到44.9 emu/g,矫顽力也从5 198.0 Oe增加到5 339.1 Oe;聚苯胺/钡铁氧体复合材料的电阻率随钡铁氧体含量的增加呈上升趋势.
Barium ferrites prepared by sol-gel and co-precipitation method were compared, respectively. PANI/BaFe12O19 composites were synthesized by in-situ polymerization. The structure of the products was characterized by XRD and SEM,the electromagnetic properties were tested by vibrating sample magnetometer and four-point probe tester. The results show that the composition of the product is maily layer hexagonal systemflake barium ferrites,with higher purity. The average grain diameter is among 20～60μm. The electromagnetic properties testing data show that the magnetization strength and coercive force of barium ferrite present rising trend with the calcinations time. When the sintering time prolongs from 3 h to 5 h, saturation magnetization strength and coercive force change from 36.9 emu/g and 5 198.0 Oe to 44.9 emu/g and 5 339.1 Oe,respectively. The electrical resistivity of the composite increases with the adding of barium ferrites particles.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2015年第12期15-19,共5页
Engineering Plastics Application
关键词
导电聚苯胺
钡铁氧体
电磁性能
conductive PANI
barium ferrite
electromagnetic
