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Etude de mousses de verres issus de Tubes à Rayons Cathodiques (TRC) en fin de vie contenant de l'oxyde de plomb : Elaboration, caractérisations physicochimiques et applications.

Abstract : This work is devoted to search of possible applications for waste Cathode-Ray-Tube (CRT) glasses. Heavy elements contained in the glasses are required be buried land field by producers and recyclers of CRT's.
Foam glass seems to be the most promising for waste CRT glasses recycling. The foam glass is commercially available and a great amount of the CRT glass could potentially be used. The foam glass is obtained after heat treatment of a powder mixture of the CRT glass and reducing agent such as titanium nitride or silicone carbide. The basic principle of foam glass manufacture is to generate a gas, by reaction between the reducing agent and lead oxide contained in the funnel CRT glass. The gas expands thus producing a structure of cells to form a porous body.
A low density leads to high porosity, about eighty percent, and a single pore size distribution has been obtained between 0.3 and 0.5 µm depending on the reducing agent used. Lead metallic granules are observed on the pore surface.
The foam glasses obtained from the CRT glass are good insulators has evidenced by their low thermal conductivity (<0.25 W.m-1.K-1) and also possess good mechanical properties. The mechanical stress was obtained between 4 and 250 MPa and depends on synthesis process. The insulating properties are conserved.
This ensemble of properties permits to consider industrials applications of thermal insulation production, in agreement with environmental legislation.
A partial depollution by mechanical extraction of the lead metallic granules formed after heat treatment is possible.
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https://tel.archives-ouvertes.fr/tel-00011189
Contributor : François Mear <>
Submitted on : Thursday, February 28, 2008 - 7:55:40 AM
Last modification on : Monday, June 8, 2020 - 10:20:04 AM
Long-term archiving on: : Thursday, September 23, 2010 - 4:21:47 PM

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  • HAL Id : tel-00011189, version 3

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François Mear. Etude de mousses de verres issus de Tubes à Rayons Cathodiques (TRC) en fin de vie contenant de l'oxyde de plomb : Elaboration, caractérisations physicochimiques et applications.. Matériaux. Université Montpellier II - Sciences et Techniques du Languedoc, 2004. Français. ⟨tel-00011189v3⟩

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