采用氧化物陶瓷工艺制备了掺Bi2O3的Li 0.4 Zn 0.2 Fe 2.4 O 4铁氧体. 用XRD、SEM、密度测试和磁性能表征, 研究了Bi2O3对LiZn铁氧体性能的影响. 结果表明: Bi2O3能有效抑制烧结过程中的锂挥发, 促进固相反应, 降低烧结温度, 但过多的Bi2O3会阻止晶粒生长; 适量掺杂Bi2O3可以提高LiZn铁氧体的饱和磁感应强度和矩形比, 降低铁氧体的矫顽力.
The lithium-zinc ferrite doped with Bi2O3 was prepared by the conventional oxide ceramic process. The effect of Bi2O3 on properties of lithium-zinc ferrite was investigated by means of characterizing the phase component and fracture surface micrograph by X-ray diffraction (XRD) and scanning electron microscope (SEM), density by Archimedean method, and magnetic properties by B-H analyzer. The results show that Bi2O3 can effectively bate the volatilization of lithium, promote solid state reaction and decrease the sintering temperature, but excessive Bi2O3 can restrain the crystal grain growth during sintering process. An optimal amount of Bi2O3 is beneficial to increase the saturation magnetic induction Bs and squareness Br/Bs, and decrease the coercive force Hc of lithium-zinc ferrite.
参考文献
| [1] | 潘永吉. 磁性材料及器件, 1999, 30 (6): 22--30. [2] 韩志全. 磁性材料及器件, 2000, 31 (5): 32--35. [3] 扬永山, 史兴宽, 胡雪梅,等. 航天工艺, 2000, (5): 1--5. [4] Nakamura T, Miyamoto T. Permeability Spectra of Low-Temperature Sintered Li-Zn-Cu Ferrite. Proceeding of 9th International Conference of Ferrite, San Francisco, 2004. 197--202. [5] Chen S H, Chang S C, Ysay C Y, et al. J. Euro. Ceram. Soci., 2001, 21: 1931--1935. [6] 余忠, 兰中文, 王京梅. 材料研究学报, 2004, 18 (2): 176--180. [7] 周济, 梁彬. 高技术通讯, 1998, 8 (4): 39--42. [8] Mamata, Maisnam, Sumitra, et al. Physica B, 2004, (352): 86--90. [9] Ono K, Fukunanga S, Matsuo Y. IEEE Trans. on Magn., 1999, 35 (5): 3406--3408. [10] Andrei P, Caltun O F. J. Magn. Magn. Mater., 1999, 196-197: 362--364. [11] Seafue W, Yuhruey W, Thomas C K, et al. J. Magn. Magn. Mater., 2000, 220: 129--138. [12] Laishram Radhapiyari, Sumitra Phanjoubam. Materials Letters, 2000, (44): 65--69. [13] Nutan Gupta, Mukesh C, Dimri, et al. Ceramics International, 2005, 31: 171--176. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%