超细氧化铈制备工艺研究

doi:10.12068/j.issn.1005-3026.2015.06.010

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (6): 800-804.DOI: 10.12068/j.issn.1005-3026.2015.06.010

超细氧化铈制备工艺研究

吴文远，薛首峰，边雪，王振峰

(东北大学材料与冶金学院，辽宁沈阳110819)

收稿日期:2014-04-22 修回日期:2014-04-22 出版日期:2015-06-15 发布日期:2015-06-11
通讯作者: 吴文远
作者简介:吴文远(1951-)，男，黑龙江哈尔滨人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51274060)；国家科技支撑计划项目(2012BAE01B02).

Study on the Preparation Process for CeO₂ Superfine Powder

WU Wen-yuan， XUE Shou-feng， BIAN Xue， WANG Zhen-feng

School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2014-04-22 Revised:2014-04-22 Online:2015-06-15 Published:2015-06-11
Contact: wuwy@smm.neu.edu.cn)
About author:-
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摘要/Abstract

摘要： 针对传统的沉淀法制备氧化铈工艺，研究了以CeCl₃溶液为原料的超声喷雾热解法制备超细CeO₂短流程工艺路线.通过TG-DTA实验研究CeCl₃·7H₂O的热分解过程，利用XRD，SEM和TEM表征了沉淀法和喷雾热解法制得的样品，最后从产品、流程及资源综合利用等方面对两种工艺进行对比分析.结果表明:CeCl₃·7H₂O在25~233℃为脱水反应，热分解温度为500℃，高于583℃热分解完全；在600℃时超声喷雾热解法制备的CeO₂分散性好、形貌规则，粒度主要分布在0.11~0.80μm，沉淀法制备的CeO₂有团聚现象且形貌不规则.超声喷雾热解法是一种流程短、资源综合利用高且产品形貌规则的清洁工艺技术.

关键词: 氧化铈, 喷雾热解, 沉淀, XRD, 热力学

Abstract: Compared with traditional precipitation process， a short process for preparation of CeO₂ superfine powder was investigated by ultrasonic spray pyrolysis using CeCl₃ solution as raw materials. The thermal decomposition process of CeCl₃·7H₂O was examined by TG-DTA experiments. CeO₂ was prepared by the precipitation and spray pyrolysis method respectively at 600℃， which was characterized by XRD， SEM and TEM. The two methods were compared in terms of products， processes and the resource comprehensive utilization. The results showed that the reaction of CeCl₃·7H₂O at 25~233℃ was a dehydration reaction， the thermal decomposition start temperature was 500℃ and end temperature was 583℃. The product synthesized via ultrasonic spray pyrolysis has good dispersion， regular morphology and the particle size distribution between 0.11~0.80μm， while the morphologies of the products obtained by precipitation process was not regular and agglomerate was also observed. Obviously， ultrasonic spray pyrolysis method is a clean technology with short process， high level resource comprehensive utilization and controllable product morphologies.

Key words: ceria, spray pyrolysis, precipitation, XRD, thermodynamic

中图分类号:

TF803.24

吴文远，薛首峰，边雪，王振峰. 超细氧化铈制备工艺研究[J]. 东北大学学报:自然科学版, 2015, 36(6): 800-804.

WU Wen-yuan， XUE Shou-feng， BIAN Xue， WANG Zhen-feng. Study on the Preparation Process for CeO₂ Superfine Powder[J]. Journal of Northeastern University Natural Science, 2015, 36(6): 800-804.

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超细氧化铈制备工艺研究

Study on the Preparation Process for CeO₂ Superfine Powder

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Study on the Preparation Process for CeO2 Superfine Powder

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Study on the Preparation Process for CeO₂ Superfine Powder