【作者】 叶夏雷； 宋玉哲； 刘斌； 林树美； 王运福； 韩根亮； 李工农； 刘国汉；

【Author】 YE Xia-lei,SONG Yu-zhe,LIU Bin,LIN Shu-mei,WANG Yun-fu, HAN Gen-liang,LI Gong-nong,LIU Guo-han (Institute of Sensor Technology,Gansu Academy of Science,Lanzhou 730000,China)

【机构】 甘肃省科学院传感技术研究所；

【摘要】 利用蔗糖作为形貌控制剂,尿素为沉淀剂,160℃水热反应后经500℃煅烧4h得到了α-Fe₂O₃空心微球。利用X射线衍射、扫描电子显微镜对产物的结构进行了分析和表征。结果表明,产物为单相的六方结构,颗粒尺寸40～100nm的纳米颗粒组装形成了直径为1～3μm的空心微球,随着蔗糖用量的增加,α-Fe₂O₃空心微球表面逐渐变得致密,并利用气敏特性静态测试仪对α-Fe₂O₃空心微球的气敏性能进行了检测。更多还原

【Abstract】 α-Fe₂O₃ hollow microspheres were successfully prepared by a hydrothermal approach using sucrose as morphology controlled agent,urea as precipitant and followed by calcination at 500℃for 4h.The structure ofα-Fe₂O₃ hollow microspheres was studied by XRD,SEM.The results show that the products were pureα-Fe₂O₃ with a hexagonal structure.And the microspheres with a diameter of 1-3μm were assembled byα-Fe₂O₃ nanoparticles （40-100nm）,the surface ofα-Fe₂O₃ hollow microspheres densified with the increasing of sucrose concentration. Above all,the gas sensing properties of the sensors based on theα-Fe₂O₃ hollow microspheres were investigated.更多还原