Lithium disilicate (LD) glass-ceramics are extensively employed in
restorative dentistry because their superior aesthetic properties and
hardness are similar to natural teeth. The aim of this work is to
investigate the mechanical properties and chemical solubility of lithium
disilicate glass-ceramics prepared by the low-pressure injection moulding
using the PEG-based binder. The glass-to-binder ratio was varied as 60:40,
55:45, 50:50 and 45:55 vol.%. The sintering conditions of 800?C with 2 h
dwell time were selected according to thermal analysis. Phase formation,
microstructure and mechanical properties of the prepared samples were
characterized by XRD, SEM, microhardness and three-point bending test,
respectively. Besides, the chemical solubility of the system was
investigated by the immersion test in acetic acid solution. XRD analyses of
the sintered sample confirmed the presence of only one prominent crystalline
phase of LD. SEM result showed that the porosity increased with decreasing
glass powder content. The mechanical properties of the LD glass-ceramic
samples tended to decrease when the proportion of the glass powder
decreased, while the chemical solubility tended to increase. The mechanical
properties of the glass-ceramics, i.e. the highest density value, Vickers
hardness and flexural strength were 2.55 g/cm3, 6.80GPa, and 176MPa,
respectively. These results could be useful in developing these LD
glass-ceramics for their optimal use in dental applications.
Electrochemical Performance of Cone-Shaped Tubular Anode Supported Solid
Oxide Fuel Cells Fabricated by Low-Pressure Injection Moulding
Technique
