Sintering and crystallization behaviors of a LZS glass-powder were investigated by means of thermal shrinkage, differential thermal analysis, X-ray diffraction as well as density and mechanical properties measurements. The melted glass, 9.56Li2O.22.36ZrO2.68.08SiO2 (wt%) first was cast into water to provide a frit for milling. The milled glass powder (mean particle size 5.0 μm) was then uniaxially pressed at 100 MPa and the obtained samples were isothermally sintered in the 800-950°C temperature range in air for appropriated time intervals (15-120 min). Sintering was found to start at about 640°C and crystallization took place just after completion of sintering and was almost complete at 920°C. The glass powder compacts crystallized into lithium and zircon silicates so that glass-ceramics with relative densities between 84 and 99% were obtained reaching maximum hardness and bending strength values of 8 ± 0.5 GPa and 214 ± 20 MPa, respectively. © (2012) Trans Tech Publications, Switzerland.
Sintering behavior of LZS glass-ceramics / Teixeira, J. D.; De Oliveira, A. P. N.; Boehs, L.; Cesconeto, F. R.; Siligardi, C.; Pereira, M. A.. - 727-728:(2012), pp. 1028-1033. (Intervento presentato al convegno 8th International Latin-American Conference on Powder Technology 2012 tenutosi a Santa Catarina, bra nel 2012) [10.4028/www.scientific.net/MSF.727-728.1028].
Sintering behavior of LZS glass-ceramics
Siligardi C.;
2012
Abstract
Sintering and crystallization behaviors of a LZS glass-powder were investigated by means of thermal shrinkage, differential thermal analysis, X-ray diffraction as well as density and mechanical properties measurements. The melted glass, 9.56Li2O.22.36ZrO2.68.08SiO2 (wt%) first was cast into water to provide a frit for milling. The milled glass powder (mean particle size 5.0 μm) was then uniaxially pressed at 100 MPa and the obtained samples were isothermally sintered in the 800-950°C temperature range in air for appropriated time intervals (15-120 min). Sintering was found to start at about 640°C and crystallization took place just after completion of sintering and was almost complete at 920°C. The glass powder compacts crystallized into lithium and zircon silicates so that glass-ceramics with relative densities between 84 and 99% were obtained reaching maximum hardness and bending strength values of 8 ± 0.5 GPa and 214 ± 20 MPa, respectively. © (2012) Trans Tech Publications, Switzerland.
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