文档介绍：刘敬肖等:常压干燥制备TiO2–SiO2复合气凝胶的结构与性能· 2303 ·第38卷第12期YMnO3纳米颗粒的制备与表征王仕发1,2,杨华1,2,县涛1,2,姜金龙2,魏智强2,冯有才2,李瑞山2,冯旺军2(1. 兰州理工大学,甘肃省有色金属新材料省部共建国家重点实验室;2. 理学院,兰州 730050) 摘要:采用改进的丙烯酰***聚合凝胶法制备YMnO纳米颗粒。通过加入丙烯酰***使Y和Mn的无机盐水溶液成胶,在溶液成胶过程中,丙烯酰***聚合形成高分子网络骨架,为粒子提供生长的空间。利用X射线衍射、热重分析、差示扫描量热分析及红外光谱等多种手段研究干凝胶的热分解及YMnO的形成过程,结果表明:在800℃煅烧可获得高纯的YMnO粉体,比固相反应法合成YMnO降低了近300℃。扫描电镜观察显示:制得的YMnO粉体的粒度分布均匀,颗粒呈类球形。磁滞回线测量结果表明:YMnO纳米颗粒在室温具有微弱的铁磁性,这是其陶瓷样品所不具有的。关键词:锰酸钇;纳米颗粒;丙烯酰***凝胶法中图分类号:O469 文献标志码:A 文章编号:0454–5648(2010)12–2303–05 PREPARATION AND CHARACTERIZATION OF YMnO3 NANOPARTICLES WANG Shifa1,2,YANG Hua1,2,XIAN Tao2,JIANG Jinlong2,WEI Zhiqiang2,FENG Youcai2,LI Ruishan2,FENG Wangjun2(1. State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials; 2. School of Science, Lanzhou University of Technology, Lanzhou 730050, China) Abstract: A modified polyacrylamide gel route was used to fabricate YMnO3 nanoparticles. In this route, the aqueous solution of anic Y and Mn salt was gelled by using acrylamide; during the gelation process, acrylamide was polymerized to form a work, which provided a structural framework for the growth of particles. The X-ray diffraction, thermogravimetric analysis, dif-ferential scanning calorimetry analysis, and Fourier transform infrared spectroscopy were used bination to investigate the thermal position process of xerogel and the formation of YMnO3 phase. It is demonstrated that high-