| 掺铁碳化硅陶瓷的制备及其吸波性能 |
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| 引用本文： | 刘星煜,胡志明,吴鹏飞,董喜超,郭长青,苏智明,刘安华. 掺铁碳化硅陶瓷的制备及其吸波性能[J]. 应用化学, 2018, 35(2): 224-231. DOI: 10.11944/j.issn.1000-0518.2018.02.170080 |
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| 作者姓名： | 刘星煜 胡志明 吴鹏飞 董喜超 郭长青 苏智明 刘安华 |
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| 作者单位： | 厦门大学材料学院 福建省特种先进材料重点实验室;高性能陶瓷纤维教育部重点实验室 福建 厦门 361005 |
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| 基金项目： | 国家自然科学基金(51603175),中央高校基本科研业务费(20720150082)资助项目 |
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| 摘 要： | 将羰基铁和液态聚碳硅烷(LPCS)反应生成的铁(Fe)溶胶与固态聚碳硅烷(PCS)混合,合成出不同Fe质量分数的PCS先驱体,然后经氧化交联和高温热解制备了不同Fe质量分数的磁性碳化硅陶瓷(Fe/SiC),系统地研究了Fe元素的引入对SiC陶瓷的组成、结构、磁性能和介电性能的影响规律。 研究发现,当Fe质量分数小于8.94%时,在热解过程中,Fe元素可以显著促进SiCxOy的分解,生成β-SiC,且随着Fe质量分数的增加,β-SiC的结晶峰越来越强;但随着Fe质量分数继续增加,达11.78%时,则主要生成Fe3Si;Fe/SiC陶瓷均呈铁磁性,其饱和磁化强度随着Fe质量分数的增加而呈指数形式增加;当Fe质量分数为4.19%时Fe/SiC陶瓷在12.4 GHz具有最小的反射损耗,为-9.4 dB,同时低于-5 dB的带宽为2.4 GHz,Fe质量分数为8.94%时,低于-5 dB的带宽则为3.7 GHz,可用作良好的微波吸收材料。
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| 关 键 词： | 碳化硅陶瓷 磁损耗 介电损耗 微波吸收材料 |
| 收稿时间： | 2017-03-23 |
Processing and Microwave-absorption Properties of Iron-containing SiC Ceramics |
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| LIU Xingyu,HU Zhiming,WU Pengfei,DONG Xichao,GUO Changqing,SU Zhiming,LIU Anhua. Processing and Microwave-absorption Properties of Iron-containing SiC Ceramics[J]. Chinese Journal of Applied Chemistry, 2018, 35(2): 224-231. DOI: 10.11944/j.issn.1000-0518.2018.02.170080 |
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| Authors: | LIU Xingyu HU Zhiming WU Pengfei DONG Xichao GUO Changqing SU Zhiming LIU Anhua |
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| Affiliation: | Fujian Key Laboratory of Advanced Materials,Key Laboratory of High Performace Ceramic Fibers of Ministry of Education,College of Materials,Xiamen University,Xiamen,Fujian 361005,China |
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| Abstract: | Different mass fraction of iron-containing silicon carbide(Fe/SiC) ceramics was successfully prepared by firstly synthesizing iron(Fe)-containing precursor via blending Fe colloids formed by the reaction of liquid polycarbosilane(PCS) and carbonyl iron with solid PCS and then the cross-linking and pyrolysis. The effects of the introduction of Fe on the component, structure, and magnetic and dielectric properties were systematically studied. When the mass fraction of iron is less than 8.94%, Fe element can significantly promote the decomposition of SiCxOy and generate β-SiC, and the crystallization peak of β-SiC is sharper with increased Fe. But when the Fe mass fraction increases to 11.78%, the main product is Fe3Si; Fe-SiC ceramics are all ferromagnetic, and their saturation magnetization increases exponentially with the increase of iron. Fe/SiC ceramic with 4.19% Fe has a minimum -9.4 dB reflection loss at 12.4 GHz. The bandwidths of less than -5 dB for Fe/SiC cermic with 4.19% and 8.94% Fe are 2.4 GHz and 3.7 GHz, respectively, which can be used as good microwave-absorption materials. |
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| Keywords: | SiC ceramics magnetic loss dielectric loss microwave-absorption material |
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