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- ROTH Felix
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt
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- WALESKA Philipp
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt
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- HESS Christian
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt
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- IONESCU Emanuel
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt
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- NICOLOSO Norbert
- Institut für Material- und Geowissenschaften, Technische Universität Darmstadt
抄録
Polymer-derived silicon oxycarbides exhibiting ≤1 and 10 vol.% of segregated carbon finely dispersed within a glassy SixOyCz matrix have been investigated by UV Raman spectroscopy using a laser excitation of 4.8 eV (λ = 256.7 nm). Carbon exists as amorphous sp2–sp3 bonded component in SiOC/C (≤1 vol.%) pyrolyzed at 1100°C in H2, including C–C single bonds, polymeric chains and small polycyclic aromatic hydrocarbons (PAHs). The formation of nanocrystalline carbon at T > 1400°C is seen in the Raman spectra of SiOC/C (≤1 vol.%) and SiOC/C (10 vol.%) by the appearance of the G band of graphite. Tempering at 1600°C increases the degree of order within the carbon phase. However, the slight narrowing of the G peak with processing temperature (by about 5%) indicates still not well-crystallized carbon: the Raman results can be best explained by turbostratic carbon (with a lateral size La of ≈2 nm) and do not support the model description in literature as a network of single layer graphene.
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 124 (10), 1042-1045, 2016
公益社団法人 日本セラミックス協会
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詳細情報
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- CRID
- 1390282680263255680
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- NII論文ID
- 130005605987
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- ISSN
- 13486535
- 18820743
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可