摘要
本文通过对原位反应合成Ag/CuO复合材料中生成立方氧化铜的可能性进行了研究,对CuO和Ag/CuO分别进行热重-差热分析实验以及反应烧结实验。结果表明:原位反应合成法制备Ag/CuO复合材料中,生成立方氧化铜有三种方式:(1)Cu与O_2直接反应合成立方CuO可能性小,或者不发生;(2)以Cu与O_2反应合成单斜的CuO后,在后期烧结时发生相转变生成立方CuO为立方CuO的主要形成方式。实验也说明了1048 K(即775℃)左右的温度即是单斜CuO与立方CuO转变的温度;(3)通过实验与理论分析还发现,Ag的存在对形成立方CuO的相变以及形成量有一定的影响。
Ag/CuO composites were prepared by in-situ reaction method.The phase transition temperature and phase constitution of Ag/CuO were studied by using thermogravimetric and differential thermal analysis（TG-DTA）,X-ray diffraction（XRD） and transmission electron microscopy（TEM）.The results are as follows：There are three ways to generate cubic CuO in Ag/CuO composites prepared by in-situ reaction,（1） Cu reacts with O_2 to produce cubic CuO,which possibility is small,or does not occur.（2） Cu reacts with O_2 to produce monoclinic CuO firstly,and then phase transition occured and generated the cubic CuO in the sintering process.This is the main way of the formation of cubic CuO.The experiment also shows that 1048 K（775 ℃） is the transition temperature of CuO transforming from monoclinic to cubic.（3） Through experimental and theoretical analysis,it is found that the existence of Ag has a certain effect on content and phase constitution of cubic CuO.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第5期1276-1281,共6页
Journal of Synthetic Crystals
基金
National Natural Science Fund Project(51361016)
Fund Project of Kunming University of Science and Technology of Talent Cultivation(KKZ3201251026)
Science Foundation of Key Laboratory of Rare-Precious and Nonferrous Metal Advanced Materials of Ministry of Education under Grant(ZDS2010014B)
Analysis and testing foundation of Kunming University of Science and Technology(20140301)
Jinchuan Research Fund(Jinchuan 201102)
