[1]杨春娟,董如林,陈智栋.均相沉淀法制备 Ce01 8 Y 01 2O 11 9氧化物固溶体的研究*[J].常州大学学报(自然科学版),2008,(02):1-5.
　Y A N G Chun- juan,DO N G Ru- lin,CH EN Zhi- dong.Study of Preparing Ce01 8 Y01 2O11 9 Solid Solution by Homogenous Precipitation[J].Journal of Changzhou University(Natural Science Edition),2008,(02):1-5.
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均相沉淀法制备 Ce01 8 Y 01 2O 11 9氧化物固溶体的研究*()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2008年02期
页码:
1-5
栏目:
材料科学与工程
出版日期:
2008-06-25

文章信息/Info

Title:
Study of Preparing Ce01 8 Y01 2O11 9 Solid Solution by Homogenous Precipitation
作者:
杨春娟;  董如林;  陈智栋
江苏工业学院 化学化工学院, 江苏 常州 213 164
Author(s):
Y A N G Chun- juan;  DO N G Ru- lin;  CH EN Zhi- dong
School of Chemistry and Chemical Eng ineering, Jiangsu Polytechnic U niversity, Changzhou 213164, China
关键词:
草酸二乙酯;  均相沉淀法;  Ce01 8Y 01 2 O11 9固溶体
Keywords:
diethy l ox alate;  homog enous precipitation;  Ce0. 8 Y 0. 2O 1. 9 so lid solution
分类号:
O 6141 32
文献标志码:
A
摘要:
采用草酸二乙酯、 Ce ( N O 3 ) 3 # 6H 2O、 Y ( N O3 ) 3 # 6H 2 O 为出发原料, 以 尿素为 pH 调节剂 达到了 Ce 3+ 、 Y3 + 的均 相 共沉淀。 重点考察尿素对溶液 pH 以及形成的粒子形貌的影响。 实 验表明 : 体系的 pH 随温度 的升高由于草酸 二乙酯、 金属 离 子 的水解作用加强而下降。 尿素的水解一方面促进了 草酸二乙酯的水解, 另一方面提高了 沉淀形成的环境 pH 。 在尿素添加量 x = 0~ 351 5 (x : 尿素与草酸二乙酯的摩尔分数) 的情况下, 体系升温前及发生沉淀时的 pH 均随 x 的增大 而上升。 经扫描电 子 显微镜观察, 发现生成的草酸盐 及相 应的氧 化物 颗粒 大小均 随 x 的增大 而减 小, 由 x = 0 时 约 10 Lm 下降 到 x = 351 5 时 约 01 5 Lm。 沉淀物经 500 e , 1 h 热处理后, 得到的氧化物经 X - 射线 衍射仪的 结晶相分 析表明为 Y 固溶 C eO 2, 其 结晶粒径 为 91 2 nm。
Abstract:
Oxalate solid solution was obtained in a mixed aqueous solution system of diethyl oxalate, cerium nitrate and yttrium nitrate with urea as pH adjuster by homogenous precipitation. It was found that the pH of the mixed solution system decreased with increasing temperature because of increased hydroly sis of the diethyl oxalate and Ce3+ , Y 3+ ion. The hydrolys is of the urea not only promoted the hydrolys is of the diethyl oxalate but also increased the pH of the mixed solution. Both the pH values before heating and at the precipitation increased with increasing x ( x : mole ratio of urea to diethyl ox alate ) when the x is in the range of 0- 3 5. 5. The SEM observ ation indicated that the precipitate and its corresponding average oxide particle size decreased from about 10 Lm to 0.5 Lm with x increasing fro m 0 to 35.5. The XRD analysis of the oxide from the precipitate by heating at 500 e for 1 h indicated that the oxide was Y doped CeO2 with crystal size 9. 2 nm.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目 : 留学回国人员 科研启 动基金 ( [2006] 331 ) ; 江苏工业学 院科研启 动基金 ( ZM F04020106) 作者简介: 杨春娟 ( 1982- ) , 女, 山东烟台人, 硕士研究生。
更新日期/Last Update: 2008-06-25