Paper Title:
New Silicate Glass-Ceramic Materials and Composites
  Abstract

New silicate glass-ceramic compositions have been investigated due to their interesting chemical, mechanical, thermal, and electrical properties. LZSA glass-ceramics based on -spodumene (Li2O•Al2O3•4-10SiO2) and zircon (ZrSiO4) crystalline phases have shown good chemical resistance, high bending strength as well as high abrasion resistance, when compared with traditional ceramic materials, and coefficient of thermal expansion from 4.6 to 9.110-6 °C-1. These features basically depend on the nature, size and distribution of the formed crystals as well as on the residual glassy phase. The nature of the formed crystalline phases and consequently the final properties can be controlled by modifying the chemical composition of the parent glass and also by adequate selection of the heat-treatment parameters. The classical fabrication of glass-ceramic materials consists on the preparation of monolithic glass components followed by heat treatments for crystallisation. However, this technology requires high investments and can be justified only for large production. A viable alternative could be the production of glass-ceramics processed from glass powders and consolidated by sintering using the same equipments of traditional ceramic plants. This work reports the manufacturing and characterization of glass-ceramic materials and composites processed by pressing, injection moulding, extrusion, casting, replication, and rapid prototyping.

  Info
Periodical
Edited by
Pietro VINCENZINI and Michele DONDI
Pages
1-12
DOI
10.4028/www.scientific.net/AST.68.1
Citation
D. Hotza, A. P. N. de Oliveira, "New Silicate Glass-Ceramic Materials and Composites", Advances in Science and Technology, Vol. 68, pp. 1-12, 2010
Online since
October 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Mafalda Guedes, Alberto C. Ferro, José Maria F. Ferreira
136
Authors: E. Dolekcekic, Michael J. Pomeroy, Stuart Hampshire
1863
Authors: Paola Palmero, Claude Esnouf, Laura Montanaro, Gilbert Fantozzi
Abstract:Two α-Al2O3/YAG composite powders have been prepared by reverse-strike precipitation, starting from chlorides aqueous solutions, the former...
267
Authors: C. Gargori, R. Galindo, M.A. Tena, A. García, G. Monrós
Abstract:Different crystalline phases (tetragonal zirconia, titanite, celsian, diopside, anortite, zircon, scheelite, casiterite, gahnite and...
55
Authors: Ye Han, Ming Gu, Wei Wei Zhang, Shu Yu Yao
Abstract:The Fe2O3-CaO-SiO2 glass ceramics were prepared by the method of quenching and controlled crystallisation. Differential thermal analysis,...
52