摘要
为了探寻甘氨酸-硝酸盐燃烧法中对钙钛矿型BaCeO3(BCO)粒径大小的影响,以甘氨酸和金属硝酸盐为原料,合成了BaCeO3纳米粉末,并采用X射线衍射、红外光谱、扫描电镜、透射电镜等技术对产物的物相结构、形貌及粒径进行了研究。结果表明,燃烧后的前驱体在900℃下煅烧2 h后可获得纯正交晶系的BaCeO3相。甘氨酸和硝酸盐的物质的量比(G/n比)对产物结构及形貌有重要的影响。当G/n比为0.5时,产物纯度最高,颗粒的形貌为类球形,粒径大小约为50nm。
Perovskite-type BaCeO3（BCO）is investigated to study the effects of the glycine-nitrate combustion process on the particle size,and BaCeO3 nanopowders are prepared using glycine and metal nitrates as raw materials.The phasestructure,morphology and size of as-prepared samples are investigated by X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FTIR）,Scanning electron microscopy（SEM） and Transmission electron microscopy（TEM）.The result shows that the pure orthorhombic BaCeO3 can be completely formed when the precursor is calcined at 900 ℃ for two hours.The molar ratio of glycine and metal nitrates（G/n molar ratios）has an important influence on the microstructure and morphology of the as-prepared powders.When the G/n molar ratios are 0.5,the highest purity of samples can be obtained,the samples are composed of nearly spherical particles with sizes of about 50 nm.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第4期563-566,共4页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金(50902070)
江苏省自然基金(BK2009391)
南京理工大学自主科研专项计划资助项目(ZDJH07)
关键词
铈酸钡
甘氨酸-硝酸盐法
纳米粉末
钙钛矿
barium cerium oxide
glycine-nitrate process
nanopowders
perovskites
