无机材料学报Issue(4)：374-378,5.DOI:10.15541/jim20140357
氧化石墨烯在水热法制备Sc2W3O12粉体中的应用
Application of Graphene Oxide in Synthesis of Sc2W3O12 Powder
摘要
Abstract
Cross-like Sc2W3O12 powder was synthesized via hydrothermal method by using scandium nitrate, am-monium tungstate hydrate as raw materials and graphene oxide as surfactant. XRD, TG-DSC, Raman and SEM were used to study the influence of graphene oxide on structures and morphologies of the as-prepared product, and the negative thermal expansion properties were detected by TMA. Results show that graphene oxide wraps the grain of Sc2W3O12 and inhibits the growth of some of the original crystal faces, which makes the grain grow to nanorods, then the nanorods assemble into cross-like structure. The pure cross-like Sc2W3O12 powder is obtained by hydro-thermal method at 200℃followed by heat treatment at 620℃ for 10 min. The TMA data indicate that the thermal expansion coefficient of Sc2W3O12 is-4.75×10-6/K from room temperature to 800℃.关键词
氧化石墨烯/表面活性剂/Sc2W3O12/负热膨胀Key words
graphene oxide/surfactant/scandium tungstate/negative thermal expansion分类
化学化工引用本文复制引用
居相文,吴日民,周亚洲,马双彪,杨娟,程晓农..氧化石墨烯在水热法制备Sc2W3O12粉体中的应用[J].无机材料学报,2015,(4):374-378,5.基金项目
国家自然科学基金(51272093) National Natural Science Foundation of China(51272093) （51272093）
