Chemical Durability of Silicon Oxycarbide Glasses

Journal of the American Ceramic Society - Tập 85 Số 6 - Trang 1529-1536 - 2002
Gian Domenico Sorarù1, Stefano Modena1, E. Guadagnino2, Paolo Colombo3, J. M. Egan4, Carlo G. Pantano4
1Università di Trento, Dipartimento di Ingegneria dei Materiali, I-38050 Trento, Italy
2Stazione Sperimentale del Vetro, I‐30141 Murano (VE), Italy
3Università di Bologna, Dipartimento di Chimica Applicata e Scienza dei Materiali, I-40136 Bologna, Italy
4Department of Materials Science and Engineering and the Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802

Tóm tắt

Silicon oxycarbide (SiOC) glasses with controlled amounts of Si—C bonds and free carbon have been produced via the pyrolysis of suitable preceramic networks. Their chemical durability in alkaline and hydrofluoric solutions has been studied and related to the network structure and microstructure of the glasses. SiOC glasses, because of the character of the Si—C bonds, exhibit greater chemical durability in both environments, compared with silica glass. Microphase separation into silicon carbide (SiC), silica (SiO2), and carbon, which usually occurs in this system at pyrolysis temperatures of >1000°–1200°C, exerts great influence on the durability of these glasses. The chemical durability decreases as the amount of phase separation increases, because the silica/silicate species (without any carbon substituents) are interconnected and can be easily leached out, in comparison with the SiOC phase, which is resistant to attack by OH− or F− ions.

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Tài liệu tham khảo

Riedel R., 1996, Processing of Ceramics, Part II, 1

10.1111/j.1151-2916.1998.tb02780.x

10.1038/382796a0

10.1111/j.1151-2916.2001.tb00986.x

10.1023/A:1008765829012

10.1557/JMR.1991.2716

10.1557/JMR.1991.2723

10.1111/j.1151-2916.1990.tb05143.x

10.1007/BF01184579

10.1021/cm00053a025

10.1557/PROC-271-789

10.1021/cm00024a035

10.1111/j.1151-2916.2001.tb00792.x

Loehman R. E., 1985, Glass IV, 119

10.1111/j.1151-2916.1985.tb16152.x

10.1016/0022-3093(86)90068-2

10.1111/j.1151-2916.1996.tb08939.x

10.1023/A:1008656230799

10.1002/9780470314234.ch32

10.1023/A:1008779915809

10.1023/A:1008775830830

10.1023/A:1008723813991

10.1023/A:1008740218534

10.1016/S0955-2219(00)00068-6

10.1021/cm970224p

S. R.Song “Chemical Vapor Deposition of Silicon Oxycarbide Thin Films by Oxy‐Carbonization of SiH4‐CO2‐C2H4Mixtures”;Ph. D. Dissertation.Pennsylvania State University University Park PA 1999.

J. M.EganandC. G.Pantano “Chemical Structure of Silicon Oxycarbide Glasses by XPS ”Surf. Int. Anal. 2001.

Iler R. K., 1979, The Chemistry of Silica

10.1021/cm00042a016

10.1016/0955-2219(95)00186-7

S.Modena “Proprietà Chimiche dei Vetri Ossicarburi”;Tesi di laurea in Ingegneria dei Materiali.Università di Trento Trento Italy 2000.

10.1021/cm00011a018

10.1063/1.1674108

10.1111/j.1151-2916.1995.tb08811.x

10.1021/cm9804719

Paul A., 1995, Chemistry of Glasses, 186

10.1002/9783527618217.ch5

10.1557/PROC-271-783

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Thông tin xuất bản

Journal of the American Ceramic Society

Tập 85 Số 6

1529-1536

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