Unlike sintered ceramics, glassceramics
are inherently free from porosity.
However, in some cases, bubbles or
pores develop during the latter stages of
crystallization. Glass-ceramics have, in
principle, several advantages.
• They can be mass produced by any
glass-forming technique.
• It is possible to design their nanostructure
or microstructure for a given
application.
• They have zero or very low porosity.
• It is possible for them to combine
a variety of desired properties.
One example of the fourth advantage
is combining very low thermal
expansion coefficient with transparency
in the visible wavelength range for
cooking ware