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Titel: Silica glass : preparation and characterization
Verfasser: Ruvolo, E. C.
Bellinetti, H. L.
Aegerter, Michel A.
Sprache: Englisch
Erscheinungsjahr: 1990
Quelle: Journal of non-crystalline solids. - 121. 1990, 1/3, S. 244-249
SWD-Schlagwörter: Quarzglas
Quarz
Tetramethoxylsilan
Sol-Gel-Verfahren
DDC-Sachgruppe: 620 Ingenieurwissenschaften und Maschinenbau
Dokumentart : Journalartikel
Kurzfassung: Silica glass with good optical quality and low OH content has been prepared by a sol-gel process. The sols have been prepared by mixing TMOS, methanol and water in acid condition, and 0.15 μm SiO2 Stöber microspheres or CabOSil M5 have been added to the sols in order to reinforce mechanically the gels and obtain monolithic samples. The gels were then dried at 60°C during 15 to 20 days. The gelation time and BET surface area have been determined as a function of the concentration of these additions and sol pH. The BET area shows an anomalous behavior with a narrow dip down to 300 m2/g for concentration of SiO2 powder of the order of 1 wt%. The gelation time exhibits a maximum at a pH of 2.5 and a minimum at a pH of 4.5. Sintering into clear and bubble free amorphous silica has been obtained by heating under controlled atmospheres (CCL4, O2 and vacuum) up to 1070°C. The OH content was measured by IR spectroscopy and found to decrease with the chlorination time. © 1990.
Link zu diesem Datensatz: urn:nbn:de:bsz:291-scidok-21746
hdl:20.500.11880/24102
http://dx.doi.org/10.22028/D291-24046
SciDok-Publikation: 29-Jun-2009
Fakultät: Sonstige Einrichtungen
Fachrichtung: SE - INM Leibniz-Institut für Neue Materialien
Fakultät / Institution:INM
SE - Sonstige Einrichtungen

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