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Mesoporous glass films supported on α-Al_2O_3

Wang, Huanting and Gavalas, George R. (2000) Mesoporous glass films supported on α-Al_2O_3. Journal of Membrane Science, 176 (1). pp. 75-85. ISSN 0376-7388. doi:10.1016/S0376-7388(00)00432-4.

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Glass–alumina composites were developed for possible use as membrane supports. Preparation involved dip-coating of α-Al_2O_3 tubes with a suspension of borosilicate glass particles (9.1% Na_2O–29.7% B_2O_3–61.2% SiO_2), sintering to convert the particle layer into a nonporous layer of phase separated glass, and leaching the glass with a strong acid to remove the soluble phase and obtain the final porous layer of about 10 μm thickness. In some preparations a 10% α-Al_2O_3 powder was added to the initial suspension. The composite supports were characterized by SEM, EDAX and EPMA for elemental composition, XRD for crystalline phase content, nitrogen adsorption for surface area and pore size distribution, and by permeation measurements with single gases and mixtures. After leaching the glass layers had pore size 1–4 nm, and contained varying amounts of boron, sodium, and aluminum oxides, in addition to silica. The nitrogen permeance of the composite supports was 10–100 times higher than that of standard porous Vycor tubing.

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Gavalas, George R.0000-0003-1468-6835
Alternate Title:Mesoporous glass films supported on α-Al2O3
Additional Information:© 2000 Elsevier. Received 21 January 2000; received in revised form 17 April 2000; accepted 20 April 2000. Dr. Chi Ma in Division of Geological and Planetary Sciences at Caltech helped with EPMA sample preparation and measurements. Funding by a grant from Mobil Technology Company is gratefully acknowledged.
Funding AgencyGrant Number
Mobil Technology CompanyUNSPECIFIED
Subject Keywords:Ceramic membranes; Composite membranes; Glass membranes; Porous glass; Phase separated glass
Issue or Number:1
Record Number:CaltechAUTHORS:20151006-150212970
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Official Citation:Huanting Wang, George R Gavalas, Mesoporous glass films supported on α-Al2O3, Journal of Membrane Science, Volume 176, Issue 1, 15 August 2000, Pages 75-85, ISSN 0376-7388, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60827
Deposited By: George Porter
Deposited On:07 Oct 2015 13:51
Last Modified:10 Nov 2021 22:40

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