Preparation and structural evolution of SiOC preceramic aerogel during high-temperature treatment

Bin Du; Changqing Hong; Anzhe Wang; Shitong Zhou; Qiang Qu; Shanbao Zhou; Xinghong Zhang

doi:10.1016/j.ceramint.2017.09.212

Preparation and structural evolution of SiOC preceramic aerogel during high-temperature treatment

Bin Du
, Changqing Hong^*
, Anzhe Wang
, Shitong Zhou
, Qiang Qu
, Shanbao Zhou
, Xinghong Zhang

^*Corresponding author for this work

School of Astronautics

Harbin Institute of Technology
China Aerospace Science and Technology Corporation

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

Silicon oxycarbide (SiOC) ceramic aerogels in mesopores range have been fabricated by pyrolyzing polycarbosilane aerogels in nitrogen (N₂) atmosphere. The reactants, poly(methylhydrosiloxane) and 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinylcyclotetrasiloxane have been heated in the presence of hydrochloroplatinic acid. As-prepared SiOC preceramic aerogel has specific surface area of 299 m²/g at room temperature, and decomposes during pyrolysis. Structural evolution of the aerogels as a function of heat-treatment temperature has been investigated by Fourier transform infrared spectrophotometer, X-ray diffraction analysis, transmission electron microscopy and X-ray photoelectron spectroscopy. Results indicate that tetrahedral Si–O–C network underwent four structural changes during thermal treatment from room temperature to 1600 °C.

Original language	English
Pages (from-to)	563-570
Number of pages	8
Journal	Ceramics International
Volume	44
Issue number	1
DOIs	https://doi.org/10.1016/j.ceramint.2017.09.212
State	Published - Jan 2018

Keywords

Aerogels
Polymer-derived ceramic aerogels
SiOC ceramics

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10.1016/j.ceramint.2017.09.212

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@article{7f2bf03eb8a74ad5ae060439c9bf6e35,

title = "Preparation and structural evolution of SiOC preceramic aerogel during high-temperature treatment",

abstract = "Silicon oxycarbide (SiOC) ceramic aerogels in mesopores range have been fabricated by pyrolyzing polycarbosilane aerogels in nitrogen (N2) atmosphere. The reactants, poly(methylhydrosiloxane) and 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinylcyclotetrasiloxane have been heated in the presence of hydrochloroplatinic acid. As-prepared SiOC preceramic aerogel has specific surface area of 299 m2/g at room temperature, and decomposes during pyrolysis. Structural evolution of the aerogels as a function of heat-treatment temperature has been investigated by Fourier transform infrared spectrophotometer, X-ray diffraction analysis, transmission electron microscopy and X-ray photoelectron spectroscopy. Results indicate that tetrahedral Si–O–C network underwent four structural changes during thermal treatment from room temperature to 1600 °C.",

keywords = "Aerogels, Polymer-derived ceramic aerogels, SiOC ceramics",

author = "Bin Du and Changqing Hong and Anzhe Wang and Shitong Zhou and Qiang Qu and Shanbao Zhou and Xinghong Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = jan,

doi = "10.1016/j.ceramint.2017.09.212",

language = "英语",

volume = "44",

pages = "563--570",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

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}

TY - JOUR

T1 - Preparation and structural evolution of SiOC preceramic aerogel during high-temperature treatment

AU - Du, Bin

AU - Hong, Changqing

AU - Wang, Anzhe

AU - Zhou, Shitong

AU - Qu, Qiang

AU - Zhou, Shanbao

AU - Zhang, Xinghong

PY - 2018/1

Y1 - 2018/1

N2 - Silicon oxycarbide (SiOC) ceramic aerogels in mesopores range have been fabricated by pyrolyzing polycarbosilane aerogels in nitrogen (N2) atmosphere. The reactants, poly(methylhydrosiloxane) and 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinylcyclotetrasiloxane have been heated in the presence of hydrochloroplatinic acid. As-prepared SiOC preceramic aerogel has specific surface area of 299 m2/g at room temperature, and decomposes during pyrolysis. Structural evolution of the aerogels as a function of heat-treatment temperature has been investigated by Fourier transform infrared spectrophotometer, X-ray diffraction analysis, transmission electron microscopy and X-ray photoelectron spectroscopy. Results indicate that tetrahedral Si–O–C network underwent four structural changes during thermal treatment from room temperature to 1600 °C.

AB - Silicon oxycarbide (SiOC) ceramic aerogels in mesopores range have been fabricated by pyrolyzing polycarbosilane aerogels in nitrogen (N2) atmosphere. The reactants, poly(methylhydrosiloxane) and 2, 4, 6, 8-tetramethyl-2, 4, 6, 8-tetravinylcyclotetrasiloxane have been heated in the presence of hydrochloroplatinic acid. As-prepared SiOC preceramic aerogel has specific surface area of 299 m2/g at room temperature, and decomposes during pyrolysis. Structural evolution of the aerogels as a function of heat-treatment temperature has been investigated by Fourier transform infrared spectrophotometer, X-ray diffraction analysis, transmission electron microscopy and X-ray photoelectron spectroscopy. Results indicate that tetrahedral Si–O–C network underwent four structural changes during thermal treatment from room temperature to 1600 °C.

KW - Aerogels

KW - Polymer-derived ceramic aerogels

KW - SiOC ceramics

UR - https://www.scopus.com/pages/publications/85030756918

U2 - 10.1016/j.ceramint.2017.09.212

DO - 10.1016/j.ceramint.2017.09.212

M3 - 文章

AN - SCOPUS:85030756918

SN - 0272-8842

VL - 44

SP - 563

EP - 570

JO - Ceramics International

JF - Ceramics International

IS - 1

ER -

Preparation and structural evolution of SiOC preceramic aerogel during high-temperature treatment

Abstract

Keywords

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