Co2+ - Ti4+共掺钡铁氧体陶瓷的微波吸收性能

Zhenjia Song, Jun Li, Kouzhong Shi, San He, C. Yuan, Zhongxiang Zhou
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引用次数: 0

摘要

m型钡铁氧体BaFe12O19 (BaM)广泛应用于磁记录和微波吸收,掺杂BaM通常具有较好的微波吸收性能。研究了溶胶-凝胶法制备的掺杂钡铁氧体$\mathbf{Ba}(\mathbf{CoTi})_{\boldsymbol{x}}\mathbf{Fe}_{12-2\boldsymbol{x}}\mathbf{O}_{19}\ (\boldsymbol{x}=0.2,\ 0.4,\ 0.6)$的磁性和吸波性能。随着掺杂量的增加,$\boldsymbol{M}_{\mathbf{r}}$和$\boldsymbol{H}_{\mathbf{c}}$迅速减小,这可能是由于Co2+和Ti4+离子的掺杂使磁性和磁性各向异性常数迅速降低。微波吸收结果表明,反射损耗的特性可以通过厚度来调制。Ba(CoTi)0.4Fe11.2O19-PVA在4.5 mm处的最大反射损耗为- 36.37 dB,带宽大于-10 dB 2.08 GHz,而Ba(CoTi)0.6 fe10.80 o19 - pva在3.6 mm处的最大反射损耗为- 29.51 dB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Microwave Absorbing Performance of Co2+ - Ti4+ Co-doped Barium Ferrite Ceramics
M-type barium ferrite BaFe12O19 (BaM) is widely used in magnetic recording and microwave absorbing and doped BaM generally has a better performance on microwave absorbing property. The magnetic performance and microwave absorbing property for doped barium ferrite $\mathbf{Ba}(\mathbf{CoTi})_{\boldsymbol{x}}\mathbf{Fe}_{12-2\boldsymbol{x}}\mathbf{O}_{19}\ (\boldsymbol{x}=0.2,\ 0.4,\ 0.6)$ synthesized by sol-gel method are investigated in this work. With the increase of doping amount, the $\boldsymbol{M}_{\mathbf{r}}$ and $\boldsymbol{H}_{\mathbf{c}}$ decrease rapidly which may be attributed to the doping of Co2+ and Ti4+ ions decreases the magnetic and the magnetic anisotropy constant quickly. The microwave absorbing results show that the property of reflection loss can be modulated by thickness. The maximum reflection loss of absorber Ba(CoTi)0.4Fe11.2O19-PVA can reach −36.37 dB at 15.44 GHz at 4.5 mm with a bandwidth over −-10 dB 2.08 GHz while Ba(CoTi)0.6Fe10.8O19-PVA can reach −29.51 dB at 17.92 GHz at 3.6 mm.
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