| 共沉淀法制备超细LaCoO3中聚乙二醇的作用研究 |
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| 引用本文： | 姚根有,李延斌,逯宝娣,卫芝贤.共沉淀法制备超细LaCoO3中聚乙二醇的作用研究[J].稀有金属,2007,31(2):192-196. |
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| 作者姓名： | 姚根有 李延斌 逯宝娣 卫芝贤 |
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| 作者单位： | 1. 中北大学理学院化学系,山西,太原,030051
2. 太原科技大学化学与生物工程学院,030021 |
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| 摘 要： | 通过zeta电位、红外光谱等研究了用共沉淀方法制备LaCoO3时分散剂-聚乙二醇PEG-4000）的作用机制;通过粘度测定选择其适宜的使用量. 结果表明： 聚乙二醇的防团聚性能是通过在超细粉体的前驱体上吸附, 进而主要通过空间位阻稳定机制发挥作用的. 当其使用量为前驱体质量的3.0%时, 可制备出团聚程度轻、分散性良好的超细LaCoO3粉体.
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| 关 键 词： | 聚乙二醇 分散剂 |
| 文章编号： | 0258-7076（2007）02-0192-05 |
| 修稿时间： | 2006-04-252006-06-20 |
Effects of Additive-PEG in Preparation of Ultrafine Powder LaCoO3 via Coprecipitation |
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| Yao Genyou,Li Yanbin,Lu Baodi,Wei Zhixian.Effects of Additive-PEG in Preparation of Ultrafine Powder LaCoO3 via Coprecipitation[J].Chinese Journal of Rare Metals,2007,31(2):192-196. |
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| Authors: | Yao Genyou Li Yanbin Lu Baodi Wei Zhixian |
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| Affiliation: | 1. Department of Chemistry, North China University, Taiyuan 030051, China; 2. Institute of Chemistry and Bioengineering, Science and Technology University of Taiyuan, Taiyuan 030021, China |
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| Abstract: | The effects and the mechanism of additive PEG-4000 in the preparation process of perovskite-type LaCoO3 ultrafine powder via coprecipitation were studied by means of particle size analysis,IR spectrum,Zeta potential measurement. The suitable additive amount(3.0%) was determined by means of viscosity measurements.The experimental results showed that agglomeration of precursor was reduced by the steric effect of PEG-4000 adsorbing on it,and the powder product quality was greatly influenced by the added amount of PEG-4000.The well-dispersed perovskite-type LaCoO3 ultrafine powder can be obtained by adding suitable amount of PEG-4000(3.0%). |
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| Keywords: | LaCoO3 |
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