功率对微波辅助溶液燃烧合成Li_2TiO_3粉末性质的影响  

Effects of power on the properties of Li_2TiO_3 powders prepared by microwave-assisted solution combustion

作　　者：陶礼耀 周启来[1] 张文[1] 薛丽红[1] 严有为[1] 

机构地区：[1]华中科技大学模具技术国家重点实验室,武汉430074

出　　处：《功能材料》2015年第8期8148-8152,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51272079);国际热核聚变实验堆ITER计划专项资助项目(2013GB110004)

摘　　要：以尿素为燃料,采用微波辅助溶液燃烧技术(MSCS)一步合成出氚增殖材料Li2Ti O3陶瓷粉末。记录了前驱体溶液的温度变化,借助X射线衍射仪(XRD)、场发射扫描电镜(FESEM)、透射电子显微镜(TEM)、傅立叶变换红外光谱仪(FT-IR)等测试手段,考察了微波功率对粉末相组成、微观形貌的影响,并与传统溶液燃烧合成的产物进行了比较。结果表明,采用MSCS技术可以避免尿素在沸腾阶段的分解,保证后续燃烧过程的进行,且随着微波功率的增大,Li2Ti O3相的相对含量逐渐增加,当微波功率达到1 200 W时,产物为单一的Li2Ti O3相,晶粒尺寸约为60 nm,粒径分布窄。The tritium breeding material,Li2 Ti O3powder,has been fabricated through microwave-assisted solution combustion synthesis( MSCS) method in one step using urea as the fuel. The dependence of temperatures on times in processes was recorded by measuring temperature system. Effects of microwave powers on combustion process,phase structure,and morphology of as-synthesized Li2 Ti O3were investigated by means of XRD,FESEM,TEM and FT-IR,etc.technology. The products were compared with that by traditional solution combustion synthesis( SCS). The results show that MSCS mehod can avoid the decomposition of urea in boiling stage,and ensure the follow-up of combustion process,and with the increase of microwave power,the relative content of Li2 Ti O3phase gradually increased. When the power was up to 1 200 W,single phase Li2 Ti O3powders can be obtained with an average grain size of about 60 nm.

关 键 词：微波辅助 溶液燃烧合成 钛酸锂 微波功率 

分 类 号：TQ174[化学工程—陶瓷工业]