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Due casi d'impiego del giallo di piombo-stagno e del giallo di antimonio come pigmenti in ceramiche antiche.
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Mechanical properties of metal-particulate lead-silicate glass matrix composites obtained by means of powder technology
No full textThe great number of waste glasses leads to the need for new applications. The realization of matrices for innovative and cost-effective materials could be an interesting way. In the present work lead silicate glasses from cathode ray tubes (CRTs) dismantling are investigated. A low cost powder processing route is proposed for the manufacture of particulate aluminium reinforced glass matrix composites. These composites exhibit an anomalous mechanical behaviour which is thought to be due to a complex metal/glass interaction. In the case of limited metal/glass interaction good bending strength and fracture toughness are achieved. The obtained KIC level of about 1,20 MPa m0,5, together with observed crack control behaviour, appears to be very promising
Sintered sanidine glass-ceramics from industrial wastes
No full textGlass obtained from melting a mixture of industrial wastes (panel glass from dismantled cathode ray tubes, mining residues from feldspar excavation and lime from fume abatement systems of the glass industry) has been employed for the production of sanidine-based glass-ceramics. The glass-ceramics were developed by a sintering treatment with concurrent crystallization, from fine powders (< 37 micron), at a relatively low temperature (880 degrees C). The enhanced nucleating activity of glass surfaces likely promoted the formation of sanidine, hardly found in glass-ceramics, as the main crystal phase. Due to the achieved mechanical properties (bending strength of about 120 MPa, Vickers' microhardness exceeding 7 GPa) and aesthetic appearance, resulting from a compact and homogeneous microstructure, the obtained sanidine glass-ceramics may find applications as construction materials. (c) 2005 Elsevier Ltd. All rights reserved
Foam glass as a way of recycling glasses from cathode ray tubes
Full text linkThe manufacturing of glass foams is proposed as a way of recycling glasses from cathode ray tubes (CRTs), following a simple and low cost processing route. No melting of CRT glasses is required, and the foaming occurs at relatively low temperatures, thus preserving the chemical stability of glasses. The obtained foams have promising mechanical properties and chemical durability, and they could be suitable for applications in the building and chemical industries
Studio preliminare di caratterizzazione chimico-mineralogica di alcuni mattoni e della malta di un muro di Palazzo Badoer a Venezia.
No full textA cura dell’Istituto per lo Studio delle Grandi Masse, CNR
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