ICCAS OpenIR
Preparation of Si-C-N-Fe magnetic ceramics from iron-containing polysilazane
Li, YM; Zheng, ZM; Reng, CY; Zhang, ZJ; Gao, W; Yang, SY; Xie, ZM
2003-02-01
Source PublicationAPPLIED ORGANOMETALLIC CHEMISTRY
ISSN0268-2605
Volume17Issue:2Pages:120-126
AbstractA new type of hyperbranched polysilazane containing iron (PSZI) compound was synthesized by the polycondensation of silazane lithium salts with FeCl3, and the structure of the PSZIs was investigated by IR, NMR and elemental analyses. The PSZIs were pyrolyzed under nitrogen, argon or NH3, and magnetic ceramics could be obtained. The ceramic yields of the PSZIs were higher than those of their corresponding silazanes, and the PSZIs or silazanes with reactive groups containing Si-H, -CH=CH2 or higher branched structures had higher yields. The magnetism of the ceramics could be controlled by a pyrolytic atmosphere and temperature: the saturation magnetization M, ranged from 20 to 100 emu g(-1) and coercivity H-c ranged from 463 to 50 Oe. The transformation of the magnetic loop of the PSZIs pyrolyzed at different temperatures under NH3 was quite different from those under nitrogen. It was shown by X-ray diffraction measurements that the magnetic crystalline form could exist as Fe4N, Fe(0) or Fe3N depending on temperature under NH3, but under a nitrogen atmosphere Fe(0) was nearly the only magnetic crystalline form from 600 to 1100degreesC. By dipping or spin-coating of the PSZI solution, then through pyrolysis under nitrogen, argon or NH3, thin uniform magnetic ceramic films could be fabricated on the substrates. Copyright (C) 2003 John Wiley Sons, Ltd.
KeywordPolysilazane Containing Iron Ceramic Composite Magnetic Ceramics Precursor Pyrolysis Si-c-n-fe Iron Nitride
DOI10.1002/aoc.400
Indexed BySCI
Language英语
WOS IDWOS:000180745900004
PublisherJOHN WILEY & SONS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80556
Collection中国科学院化学研究所
Corresponding AuthorXie, ZM
Affiliation1.Chinese Acad Sci, Inst Chem, State Key Lab Engn Plast, Ctr Mol Sci,Grp 404, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Li, YM,Zheng, ZM,Reng, CY,et al. Preparation of Si-C-N-Fe magnetic ceramics from iron-containing polysilazane[J]. APPLIED ORGANOMETALLIC CHEMISTRY,2003,17(2):120-126.
APA Li, YM.,Zheng, ZM.,Reng, CY.,Zhang, ZJ.,Gao, W.,...&Xie, ZM.(2003).Preparation of Si-C-N-Fe magnetic ceramics from iron-containing polysilazane.APPLIED ORGANOMETALLIC CHEMISTRY,17(2),120-126.
MLA Li, YM,et al."Preparation of Si-C-N-Fe magnetic ceramics from iron-containing polysilazane".APPLIED ORGANOMETALLIC CHEMISTRY 17.2(2003):120-126.
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