Glass Ceramic Structure

To convert them from a vitreous glass material into a crystalline glass ceramic material they must be heat treated or devitrified.

Glass ceramic structure. 9 the phase assemblage consists of spinel solid solution crystals dispersed throughout a continuous. Devitrification can occur spontaneously during cooling or in service but is most commonly incorporated to. Glass ceramics are made of small grains surrounded by a glassy phase and have properties in between those of glass and ceramics. The key difference between glass and ceramic is that ceramics have crystalline or semi crystalline or non crystalline atomic structure whereas the atomic structure of glass is non crystalline.

Glass ceramic components are formed using the same processes that are applicable to glass components. We use a vast range of ceramic materials in the day to day life. Glass ceramic materials share many properties with both glasses and ceramics glass ceramics have an amorphous phase and one or more crystalline phases and are produced by a so called controlled crystallization in contrast to a spontaneous crystallization which is usually not wanted in. These glass ceramics can be made highly transparent with spinel crystals on the order of 10 50 nm in size fig.

Glass ceramics are polycrystalline materials produced through controlled crystallization of base glass. Ceramics and glass have many applications that require qualities such as hardness rigidity high resistance to heat corrosion etc.