材料科学与工程学报2017，Vol.35Issue(6)：861-865,5.DOI:10.14136/j.cnki.issn 1673-2812.2017.06.001
吸附钡铁氧体的多孔陶粒吸波材料制备及其性能
Preparation and Performances of Porous Electro-magnetic Wave Absorbing Ceramisite Coated with Barium Ferrite
摘要
Abstract
Barium ferrite was prepared by sol-gel method with ferric nitrate,barium nitrate and citric acid.And micro-wave absorbing functional ceramisite was obtained by coating the synthesized barium ferrite gel on the surface of porous ceramisite and then calcining.Furthermore,a new type of cement-based micro-wave absorbing material was prepared using the functional ceramisite as aggregate.The composition,morphology,complex permittivity and complex permeability of the synthesized barium ferrite were investigated by means of X-ray diffraction analysis (XRD),scanning electron microscope (SEM),and Vector Network Analyzer (VNA),respectively.Results show that its purity is high,and calcination temperature has effect on its crystallization degree and particle morphology;Barium ferrite prepared at 1000℃ shows good micro-wave absorbing ability.XRD and SEM-EDS were used to characterize functional ceramisite,and the results show that barium ferrite can be tightly coated on the surface and pore wall of porous ceramisite.The reflectivity of cement-based composite was measured by Naval Research Laboratory (NRL) testing system in the frequency ranges from 8 to 18 GHz.The acquired data is between-8.9 to-9.8dB,which are obviously superior to those specimens prepared with gravel and ordinary ceramisite.关键词
溶胶-凝胶/钡铁氧体/功能陶粒/反射率Key words
sol-gel/barium ferrite/functional ceramisite/reflectivity分类
信息技术与安全科学引用本文复制引用
何永佳,肖培浩,肖静,吕林女,王发洲,胡曙光..吸附钡铁氧体的多孔陶粒吸波材料制备及其性能[J].材料科学与工程学报,2017,35(6):861-865,5.基金项目
国家自然科学基金资助项目(51372183,51461135005) （51372183,51461135005）
