Nanocluster-containing mesoporous magnetoceramics from hyperbranched organometallic polymer precursors
文献类型：期刊论文
| 作者 | Sun QH ; Lam JWY ; Xu KT ; Xu HY ; Cha JAK ; Wong PCL ; Wen GH ; Zhang XX ; Jing XB ; Wang FS ; Tang BZ |
| 刊名 | chemistry of materials
 |
| 出版日期 | 2000 |
| 卷号 | 12期号:9页码:2617-2624 |
| 关键词 | RAY PHOTOELECTRON-SPECTROSCOPY MATRIX-MEDIATED SYNTHESIS SILICON-CARBIDE FIBER HIGH-MOLECULAR-WEIGHT ELECTRONIC-STRUCTURE DEPOLYMERIZATION PRODUCTS MAGNETIC NANOCOMPOSITE BLOCK-COPOLYMERS POLY(FERROCENYLSILANES) FILMS |
| ISSN号 | 0897-4756 |
| 通讯作者 | tang bz |
| 中文摘要 | pyrolysis of hyperbranched poly[1,1'-ferrocenylene(methyl)silyne] (5) yields mesoporous, conductive, and magnetic ceramics (6). sintering at high temperatures (1000-1200 degrees c) under nitrogen and argon converts 5 to 6n and 6a, respectively, in similar to 48-62% yields. the ceramization yields of 5 are higher than that (similar to 36%) of its linear counterpart poly[1,1'-ferrocenylene(dimethyl)silylene] (1), revealing that the hyperbranched polymer is superior to the linear one as a ceramic precursor. the ceramic products 6 are characterized by sem, xps, edx, xrd, and squid. it is found that the ceramics are electrically conductive and possess a mesoporous architecture constructed of tortuously interconnected nanoclusters. the iron contents of 6 estimated by edx are 36-43%, much higher than that (11%) of the ceramic 2 prepared from the linear precursor 1. the nanocrystals in 6n are mainly alpha-fe2o3 whereas those in 6a are mainly fe3si. when magnetized by an external field at room temperature, 6a exhibits a high-saturation magnetization (m-s similar to 49 emu/g) and near-zero remanence and coercivity; that is, 6a is an excellent soft ferromagnetic material with an extremely low hysteresis loss. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000089458000019 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://202.98.16.49/handle/322003/19565]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Sun QH,Lam JWY,Xu KT,et al. Nanocluster-containing mesoporous magnetoceramics from hyperbranched organometallic polymer precursors[J]. chemistry of materials,2000,12(9):2617-2624. |
| APA | Sun QH.,Lam JWY.,Xu KT.,Xu HY.,Cha JAK.,...&Tang BZ.(2000).Nanocluster-containing mesoporous magnetoceramics from hyperbranched organometallic polymer precursors.chemistry of materials,12(9),2617-2624. |
| MLA | Sun QH,et al."Nanocluster-containing mesoporous magnetoceramics from hyperbranched organometallic polymer precursors".chemistry of materials 12.9(2000):2617-2624. |
入库方式： OAI收割
来源：长春应用化学研究所
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