| 溶胶-凝胶法制备La1-xSrxMnO3及其电磁性能研究 |
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| 引用本文： | 王伟超,刘顾,汪刘应,葛超群,王龙,许可俊,陈孟州.溶胶-凝胶法制备La1-xSrxMnO3及其电磁性能研究[J].稀有金属材料与工程,2022,51(3):1003-1010. |
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| 作者姓名： | 王伟超 刘顾 汪刘应 葛超群 王龙 许可俊 陈孟州 |
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| 作者单位： | 火箭军工程大学,火箭军工程大学,火箭军工程大学,火箭军工程大学,火箭军工程大学,火箭军工程大学,火箭军工程大学 |
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| 基金项目： | 国防科技基础加强计划技术领域基金(项目号2020-JCJQ-JJ222),陕西省“特支计划”科技资助(陕组通字(2020)44号) |
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| 摘 要： | 采用溶胶凝胶法,制备了La1-xSrxMnO3(LSMO)纳米微粉。探究了Sr2+的掺杂量对LSMO晶体结构、磁学性质、电磁特性和微波吸收性能的影响。结果表明,随Sr2+含量的升高,样品的晶格常数和Mn-O-Mn键角增大,平均晶粒尺寸逐渐下降,样品出现从反铁磁性向铁磁性的转变,复介电常数呈先增大后减小的趋势。在2~18GHz内,x=0的样品在厚度为2mm时有最佳吸波效果,反射率小于-10dB对应的有效吸波频段为12.5~18GHz；Sr2+的掺杂可使吸波频段有效的向低频移动,在X波段内,x=0.2的样品在厚度为2.3mm时的有效带宽达2.6GHz,证明LSMO是一种性能优异的介电损耗型吸波材料。
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| 关 键 词： | 钙钛矿 La1-xSrxMnO3 电磁性能 吸波性能 溶胶-凝胶法 |
| 收稿时间： | 2021/3/16 0:00:00 |
| 修稿时间： | 2021/4/28 0:00:00 |
Electromagnetic Properties of La1-xSrxMnO3prepared by Sol-gel Method |
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| Wang Weichao,Liu Gu,Wang Liuying,Ge Chaoqun,Wang Long,Xu Kejun and Chen Mengzhou.Electromagnetic Properties of La1-xSrxMnO3prepared by Sol-gel Method[J].Rare Metal Materials and Engineering,2022,51(3):1003-1010. |
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| Authors: | Wang Weichao Liu Gu Wang Liuying Ge Chaoqun Wang Long Xu Kejun and Chen Mengzhou |
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| Abstract: | La1-xSrxMnO3 nanometer powders were prepared by sol-gel method. The crystal structure, magnetic properties, electromagnetic properties and microwave absorption properties of LSMO with different doping amount of Sr2+ were investigated. The results show that with increased amount of Sr2+, the lattice constant and Mn-O-Mn bond Angle increase, while the average grain size decreases gradually and the complex dielectric constant increases first and then decreases. The LSMO changes from antiferromagnetism to ferromagnetism when Sr2+ is doped. In the range of 2~18GHz, the best absorbing properties can be arrived when the doping amount of Sr2+ is 0 and the thickness is 2mm. The effective frequency band corresponding to the reflectivity less than -10dB is 12.5~18GHz. The doping of Sr2+ can make the absorbing bandwidth move to the low frequency availably. In the X-band, the effective bandwidth of the LSMO reaches 2.6GHz when the doping amount of Sr2+ is 0.2 and the thickness is 2.3mm. It is proved that LSMO is a kind of dielectric loss absorbing material with excellent performance. |
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