The effect of annealing at 1400°C on the structural evolution of porous C-rich silicon (boron)oxycarbide glass

Sorarù, Gian Domenico; Pena Alonso, R.; Kleebe, H. J.

doi:10.1016/j.jeurceramsoc.2011.12.018

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A precursor SiBOC glass was annealed at 1400 ◦C for 1, 3, 5 and 10 h and then it was HF etched in order to dissolve the SiO2/B2O3 phase and to obtain a porous C-rich oxycarbide glass. The porous material was studied by N2 absorption. The pore diameter of the porous C-rich SiBOC glass ranges between 2 and 5 nm and continuously increases with increasing annealing time. The pore volume also increases with the annealing time up to ≈1.0 cm3/g which is close to the pore volume estimated from the chemical composition (1.04 cm3/g) assuming complete dissolution of the silica-based phase.

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Titolo:	The effect of annealing at 1400°C on the structural evolution of porous C-rich silicon (boron)oxycarbide glass
Autori Unitn:	Sorarù, Gian Domenico R. Pena Alonso H. J. Kleebe mostra contributor esterni nascondi contributor esterni
Anno di pubblicazione:	2012
Titolo del periodico:	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Abstract:	A precursor SiBOC glass was annealed at 1400 ◦C for 1, 3, 5 and 10 h and then it was HF etched in order to dissolve the SiO2/B2O3 phase and to obtain a porous C-rich oxycarbide glass. The porous material was studied by N2 absorption. The pore diameter of the porous C-rich SiBOC glass ranges between 2 and 5 nm and continuously increases with increasing annealing time. The pore volume also increases with the annealing time up to ≈1.0 cm3/g which is close to the pore volume estimated from the chemical composition (1.04 cm3/g) assuming complete dissolution of the silica-based phase.
Handle:	http://hdl.handle.net/11572/90486
Appare nelle tipologie:	03.1 Articolo su rivista (Journal article)

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