| 溶胶-凝胶低温自蔓延工艺合成Co0.5Ni0.5Mn2O4纳米粉体的过程稳定性研究 |
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| 引用本文： | 王卫民,赵鸣,赵丽丽,高峰,田长生.溶胶-凝胶低温自蔓延工艺合成Co0.5Ni0.5Mn2O4纳米粉体的过程稳定性研究[J].人工晶体学报,2006,35(2):294-298. |
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| 作者姓名： | 王卫民 赵鸣 赵丽丽 高峰 田长生 |
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| 作者单位： | 西北工业大学材料学院,西安,710072 |
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| 基金项目： | 航空基金(No.02G53044)资助项目 |
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| 摘 要： | 本文研究了溶胶-凝胶低温自蔓延工艺合成Co0.5Ni0.5Mn2O4纳米粉体过程中柠檬酸-硝酸盐体系的稳定性.研究结果表明:柠檬酸盐的析出是造成溶胶-凝胶体系不稳定主要因素;加入乙二醇与柠檬酸形成网络结构、以及金属离子与柠檬酸羧基之间形成的配位键是保证溶胶-凝胶体系稳定的两个必不可少的条件.
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| 关 键 词： | 溶胶-凝胶 纳米粉体 NTC热敏电阻 柠檬酸 乙二醇 |
| 文章编号： | 1000-985X（2006）02-0294-05 |
| 收稿时间： | 07 5 2005 12:00AM |
| 修稿时间： | 2005-07-05 |
Study on Stability in the Preparation of Co0.5Ni0.5Mn2O4 by Sol-gel Auto-combustion Process |
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| WANG Wei-min,ZHAO Ming,ZHAO Li-li,GAO Feng,TIAN Chang-sheng.Study on Stability in the Preparation of Co0.5Ni0.5Mn2O4 by Sol-gel Auto-combustion Process[J].Journal of Synthetic Crystals,2006,35(2):294-298. |
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| Authors: | WANG Wei-min ZHAO Ming ZHAO Li-li GAO Feng TIAN Chang-sheng |
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| Abstract: | The detailed studies on the stability in the preparation of Co_(0.5)Ni_(0.5)Mn_2O_4 by sol-gel auto-combustion process are given in this paper.It is demonstrated that the formation of precipitation related to the citrate is a main factor to induce the instability of citrate-nitrate solution.There are two necessary conditions to keep the stability.One of the conditions is the formation of the network between the citric acid and EG,which is important to form a stable sol-gel,and the other is the formation of chemical bond between the metal cations and the carboxyl. |
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| Keywords: | sol-gel nanocrystalline NTC thermistor citric acid EG |
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