摘要
以Al+Fe2O3+BaO2+蔗糖+环氧树脂为反应体系、聚乙二醇为表面活性剂,运用将火焰喷涂技术与自蔓延高温合成技术(Self-propagating High-temperature Synthesis,缩写SHS)及快速冷却凝固技术相结合的自反应淬熄法,制备了空心复相陶瓷微珠。通过SEM、EDS、XRD等手段,研究了聚乙二醇的加入对团聚粉及制备的空心陶瓷微珠的影响。结果表明,与未加聚乙二醇相比,加入聚乙二醇后,团聚粉颗粒分布均匀,具有良好的流动性;所制备的空心微珠粒径趋于一致,成球率得到了明显提升,相结构中Fe3O4转变成了Fe2O3,且出现了具有尖晶石结构的BaFe2O4,这有助于提高空心微珠的吸波性能。
Hollow multi-phase ceramic micro-spheres was prepared under Al＋Fe2O3＋BaO2 reactive system,adopting polyethylene glycol（PEG） as the surfactant,using self-reaction quenching technique based on flame spraying technique,self-propagating high-temperature synthesis（SHS） and quick chilling technique.This paper investigates the effects of PEG on the agglomerate powders and the hollow micro-spheres are studied,by means of SEM、EDS and XRD.The results show that,compared with those without adding the surfactant,the agglomerate powders has a more concentrated distribution and more excellent fluidity after using PEG.The sphere formation rate of the hollow micro-spheres produced by the agglomerate powders including PEG has improved greatly,and the particle size tends to be consistent.After adding PEG,Fe3O4 turns to be Fe2O3,and BaFe2O4 with spinel structure can be seen in the constitution phase of hollow micro-spheres,which is helpful to improve the microwave absorbing properties of hollow micro-spheres.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第6期1778-1784,共7页
Journal of Synthetic Crystals
基金
国家自然科学基金(No.51172282)
关键词
空心微珠
表面活性剂
团聚粉
聚乙二醇
自反应淬熄法
hollow microspheres
surfactant
agglomerate powders
polyethylene glycol
self-reaction quenching technique
