| 椭球形α—Fe2O3微粒子合成研究 |
| |
| 引用本文： | 任福民,曾桓兴.椭球形α—Fe2O3微粒子合成研究[J].中国科学技术大学学报,1991,21(1):103-108. |
| |
| 作者姓名： | 任福民 曾桓兴 |
| |
| 作者单位： | 中国科学技术大学材料科学与工程系
(任福民)，中国科学技术大学材料科学与工程系(曾桓兴) |
| |
| 摘 要： | 研究了利用Fe(NO_3)_3水溶液强迫水解制备均匀椭球形α-Fe_2O_3微粒子的多种影响因素,比较了密闭的静态环境和沸腾回流的动态开放环境下的水解反应。实验发现加入微量NaH_2PO_4后,Fe(NO_3)_3在较高起始浓度(0.2M)和较短水解时间内(5h～7h)可制备颗粒完整、尺寸比较均匀的椭球形α—Fe_2O_3微粒子。这为用新方法生产NP磁粉作了有意义的尝试。还对反应机理作了探讨。
|
| 关 键 词： | α-Fe_2O_3 椭球形微粒子 强迫水解法 NP磁粉 |
The Synthesis of Ellipsoidal Hematite Microparticles |
| |
| Ren Fumin Zheng Huanxing.The Synthesis of Ellipsoidal Hematite Microparticles[J].Journal of University of Science and Technology of China,1991,21(1):103-108. |
| |
| Authors: | Ren Fumin Zheng Huanxing |
| |
| Institution: | Department of Materials Science and Engineering |
| |
| Abstract: | This paper studied the effection factors of the synthesis of ellipsodal hematite micro-particles by forced hydrolysis of ferric nitrate at elevated temperatures. Differences were compared between hydrolysis in an opened system (with boiling and cooling equipment) and hydrolysis in a closed system. It was found that by adding a small quantity of phosphate ion into the former system before ageing, ellipsoidal hematite micro-particles of narrow size distribution could be obtained in higher ferric nitrate concentration within a shorter synthesis time, which is advantageous to the production of NP magnetic particles by a new synthesis way. |
| |
| Keywords: | hematite ellipsoidal particles forced hydrolysis NP magnetic particles |
| 本文献已被 CNKI 维普 等数据库收录！ |
