This work reports some experimental results regarding to a Li2O-ZrO2-SiO2-Al2O3 (LZSA) sintered glass-ceramic material obtained by roll pressing of glass powders (mean particle size ≈ 5 μm) with an added (7 wt.%) inorganic material (bentonite) as binder. The composition was characterized using chemical analysis, laser-scattering particle size analysis, DTA, XRD, thermal expansion, modulus of rupture (MOR) and deep abrasion (DA) measurements as well as density measurements and SEM observations. From the results it was verified that the glass-ceramic materials obtained by sintering and controlled crystallization, in the 850-1030°C temperature range, of glass powders, have properties and characteristics decisively better than those of other traditionally used materials. It is concluded that roll pressing technology is a potential candidate to produce sintered glassceramics for many applications, such as, for example, large sheets panels for electrical and thermal insulation.
[1]
P. Greil,et al.
LZSA glass ceramic foams prepared by replication process
,
2005
.
[2]
E. Rabinovich.
Preparation of glass by sintering
,
1985
.
[3]
N. A. Kir'yanova,et al.
Cordierite material with sintered condition extending over a 300°C interval
,
1977
.
[4]
M. Fredel,et al.
Injection moulding of LiO2-ZrO2-SiO2-Al2O3 (LZSA) glass ceramics
,
2005
.
[5]
D. Hotza,et al.
Sintering and Crystallization of LZSA Glass Powder Compacts Formed by Injection Molding
,
2005
.
[6]
C. Siligardi,et al.
Extruded LZS glass-ceramics
,
2004
.
[7]
Donald R Uhlmann,et al.
Glass--science and technology
,
1980
.
[8]
Joel S. Hirschhorn,et al.
Introduction to powder metallurgy
,
1969
.