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| 纳米级M型铁氧体的溶胶-凝胶法制备和形貌控制 | |
| 引用本文： | 沈国柱,徐政,李轶. 纳米级M型铁氧体的溶胶-凝胶法制备和形貌控制[J]. 材料科学与工程学报, 2005, 23(5): 521-523 |
| 作者姓名： | 沈国柱 徐政 李轶 |
| 作者单位： | 同济大学材料科学与工程学院,上海,200092;同济大学材料科学与工程学院,上海,200092;同济大学材料科学与工程学院,上海,200092 |
| 摘 要： | 以硝酸钡、硝酸铁和氨水为原料,采用柠檬酸sol-gel工艺,制备了M型六角钡铁氧体(BaFe12O19)纳米晶.运用X射线衍射仪和透射电子显微镜等表征手段研究了产物的结构和形貌.结果表明不同的升温烧结工艺对所制备产物的结构和形貌影响很大,升温速率快,有利于片状产物的形成,慢的升温速率易形成棒状产物.并讨论了不同的升温烧结机制影响铁氧体结构和形貌的原因. |
| 关 键 词： | 柠檬酸sol-gel法 钡铁氧体 纳米粒子 制备 |
| 文章编号： | 1004-793X(2005)05-0521-03 |
| 修稿时间： | 2004-11-15 |
Preparation and Morphological Controlling of Nonophase M-type Ferrite by Sol-gel Method |
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| SHEN Guo-zhu,XU Zheng,LI Yi. Preparation and Morphological Controlling of Nonophase M-type Ferrite by Sol-gel Method[J]. Journal of Materials Science and Engineering, 2005, 23(5): 521-523 | |
| Authors: | SHEN Guo-zhu XU Zheng LI Yi |
| Abstract: | Citrate sol-gel process was used to prepare M-type hexagonal Ba-ferrite nanocrystals. The structure and morphology of the prepared products were investigated by means of X-ray powder diffractometry (XRD) and transmission electron microscopy (TEM). The results showed that the different sintering process largely influences the structure and morphology of the prepared products. Sheet-like nanoparticles could be obtained in the sintering process with a rapid temperature rising rate, while nanorods were obtained with a slow rate. The formative mechanism of the different structures and morphologies of the prepared Ba-ferrite nanoparticles was also discussed. |
| Keywords: | citrate sol-gel method Ba-ferrite nanoparticles preparation |
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