Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Raquel Peña-Alonso"'
Publikováno v:
Microporous and Mesoporous Materials. 172:125-130
The HF etching of a silicon(boron)oxycarbide glass was, for the first time, followed in situ by synchrotron radiation X-ray diffraction. The starting Si(B)OC glass is formed by two interpenetrating nano-sized networks, one SiO2-rich and the other C-r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf431611f010a7479217b5253eb25d8b
https://doi.org/10.1016/j.micromeso.2013.01.026
https://doi.org/10.1016/j.micromeso.2013.01.026
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
Two sets of solgel derived glass materials have been prepared and subjected to different thermal treatments. Pyrolysis in inert atmosphere lead to the formation of amorphous Si(B)CO ceramics whereas if the inert atmosphere is changed to NH once the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ccfa5a6a6e38a779bf8c7af3ea0fa7c
http://hdl.handle.net/10261/217532
http://hdl.handle.net/10261/217532
Publikováno v:
Journal of the European Ceramic Society. 32:1751-1757
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 diamet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51395e5b52672d339199c29b67174c3b
https://doi.org/10.1016/j.jeurceramsoc.2011.12.018
https://doi.org/10.1016/j.jeurceramsoc.2011.12.018
Autor:
Gian Domenico Sorarù, Raquel Peña-Alonso, Aitana Tamayo, Juan Rubio, Rishi Raj, José Luis Oteo
Publikováno v:
Journal of the American Ceramic Society. 94:4523-4533
The surface properties of different SiOC glasses before and after HF etching have been analyzed by means of nitrogen adsorption and inverse gas chromatography (IGC) at infinite dilution. Raman and Drift spectroscopies have been also used for structur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54802fccbb1298bc3883de5c9e99cdfc
https://doi.org/10.1111/j.1551-2916.2011.04810.x
https://doi.org/10.1111/j.1551-2916.2011.04810.x
Publikováno v:
Journal of Sol-Gel Science and Technology. 43:313-319
The sol–gel method has been used for the synthesis of borosilicate gels from mixtures of methyltriethoxysilane (MTES) and dimethyldiethoxysilane (DMDES) and boric acid. The use of boric acid, B(OH)3 allows the hydrolysis and condensation of hybrid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf6e5369c36f2ea70c43570388404c65
https://doi.org/10.1007/s10971-007-1558-2
https://doi.org/10.1007/s10971-007-1558-2
Publikováno v:
Journal of the American Ceramic Society. 89:2473-2480
Etching polymer-derived silicon-oxycarbide ceramics with hydrofluoric acid creates nanoporous structures of specific surface areas as high as 600 m2/g. The change in composition upon etching shows the removal of silica, not carbon. The structure rema
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c144cb45b3a04a89debc21361782c9c4
https://doi.org/10.1111/j.1551-2916.2006.01117.x
https://doi.org/10.1111/j.1551-2916.2006.01117.x
Publikováno v:
Journal of Sol-Gel Science and Technology. 38:133-145
The application of nitrogen adsorption, mercury porosimetry and inverse gas chromatography (IGC) for the examination of surface physical and chemical properties of hybrid materials is discussed. Hybrid materials were prepared from tetraethoxysilane (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36f7762ddee93c3c356a0dea9b4a8eef
https://doi.org/10.1007/s10971-006-7116-6
https://doi.org/10.1007/s10971-006-7116-6
Publikováno v:
Journal of Sol-Gel Science and Technology. 26:195-199
Mixed vitreous oxycarbide glasses containing silicon and boron were prepared by pyrolysis of hybrid precursors in N2 at 1100°C. Four different precursors were synthesized through the sol-gel process using TEOS, TEB and PDMS. Poly-condensation betwee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d8b4a8bb8433c30b0cb2bdb0a36646e
https://doi.org/10.1023/a:1020738829707
https://doi.org/10.1023/a:1020738829707
Polymer derived SiOC microcellular foams were etched by means of a 20 vol.-%HF solution. An increase in one order of magnitude in specific surface area (SSA) values compared to the unetched samples was observed. This SSA increase was accompanied by m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fad8782da807e585b1124e74bd0ae4d3
http://hdl.handle.net/11577/2265566
http://hdl.handle.net/11577/2265566
Autor:
Raquel Peña-Alonso, Gino Mariotto, Christel Gervais, Florence Babonneau, Gian Domenico Soraru
Publikováno v:
Chemistry of Materials; Nov2007, Vol. 19 Issue 23, p5694-5702, 9p