摘要
用柠檬酸(C6H8O7·H2O,citricacid,CA)做还原剂,硝酸盐做氧化剂,利用溶胶–凝胶低温燃烧合成工艺制备Ce0.8Y0.2O1.9纳米固溶体。用X射线衍射、红外光谱研究CA用量、前驱体溶液的pH值对溶胶–凝胶形成的影响。利用差热-热重分析仪、透射电镜及X射线衍射仪分析凝胶的分解及产物的微观结构。结果表明:络合物之间是通过氢键的方式凝胶化的,控制CA的用量、溶液的pH值可以获得稳定的凝胶。改变氧化剂的用量可以获得颗粒尺寸为5～40nm的Ce0.8Y0.2O1.9超细粉体。
Nano-scale Ce0.8Y0.2O1.9 solid solution was synthesized by a sol - gel combustion technique using citric acid as reductant and nitrates as oxidants, The effects of processing parameters, such as the amount of citric acid and the pH value of solution on the gel formation were investigated using X-ray diffraction （XRD） and infi＇ared spectroscopy, and the decomposition of the gel and the microstructure of the powders were studied by thermogravimetry and differential thermal analysis, transmission electron microscope and XRD. The results show the gel is formed through hydrogen bonds, and a stable gel is obtained by controlling the amount of cilric acid and the pH value, Nano-scale Ce0.8Y0.2O1.9 powders in the range of 5 nm to 40 nm are obtained by changing the amount of oxidants.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第4期393-397,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学D基金(50304008)
教育部博士点基金(20030532016)
]化学生物传感与计量学国家重点实验室开放基金(2005016)资助项目。
关键词
掺杂二氧化铈
燃烧合成
纳米固溶体
红外光谱
doped ceria
combustion synthesis
nano-scale solid solution
infrared spectrum
