| 柠檬酸盐凝胶的自燃烧与铁氧体纳米粉合成 |
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| 引用本文： | 岳振星,周济,张洪国,桂治轮,李龙土. 柠檬酸盐凝胶的自燃烧与铁氧体纳米粉合成[J]. 硅酸盐学报, 1999, 27(4): 466-470 |
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| 作者姓名： | 岳振星 周济 张洪国 桂治轮 李龙土 |
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| 作者单位： | 清华大学材料系新型陶瓷与精细工艺国家重点实验室 |
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| 基金项目： | 国家“863”高技术新材料领域资助项目 |
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| 摘 要： | 借助差热分析、红外吸收光谱和Ｘ射线衍射技术研究了硝酸盐－柠檬酸盐凝胶的热分解和燃烧过程，发现具有一定组成的镍铜锌铁硝酸盐和柠檬形成的凝胶具有自蔓延燃烧特征，燃烧后直接形成粒径为２０～５０ｎｍ具有尖晶石结构的单相铁氧体粉末，调整硝酸盐和柠檬本的比例可控燃烧速率和燃烧过程，进而调控纳米粉末的颗粒尺寸和磁相结构。
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| 关 键 词： | 溶胶-凝胶技术 自燃烧 镍铜锌铁氧体 纳米粉末 |
AUTO-COMBUSTION BEHAVIOR OF NITRATE-CITRATE GELS AND SYNTHESIS OF FERRITE NANO-PARTICLES |
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| Yue Zhenxing,Zhou Ji,Zhang Hongguo,Gui Zhilun,Li Longtu. AUTO-COMBUSTION BEHAVIOR OF NITRATE-CITRATE GELS AND SYNTHESIS OF FERRITE NANO-PARTICLES[J]. Journal of The Chinese Ceramic Society, 1999, 27(4): 466-470 |
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| Authors: | Yue Zhenxing Zhou Ji Zhang Hongguo Gui Zhilun Li Longtu |
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| Abstract: | The combustion process of nitrate-citrate gels was studied using DTA, IR spectra and XRD techniques. The results reveal that the dried gels, formed from metal(Ni,Cu,Zn and Fe)nitrates and citric acid, have auto_combustion behavior. The single phase NiCuZn ferrite powder with spinel structure and particle size of 2050 nm are directly synthesized after auto_combustion of gels, without calcination at higher temperature. The combustion rate and process can be controlled by changing the ratio of nitrate to citric acid, and then the particle size and magnetic structure can be controlled. |
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| Keywords: | sol-gel technique auto_combustion NiCuZn ferrites nano_particles |
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