glass ceramic definition

glass ceramic means an inorganic non-metallic material where one or more crystalline phases are surrounded by a glassy phase so that the material comprises a glass material and a ceramic material in a combination or mixture. It is formed as a glass, and then made to crystallize partly by heat treatment. Glass ceramics may refer to a mixture of lithium-, silicon-, and aluminium-oxides.
glass ceramic means an inorganic non-metallic material obtained by melting of mainly mineral raw materials at high temperature, the homogeneous liquid being cooled down progressively after contitution then crystallised to a certain degree by heat treatment. Glass ceramic materials may be combined together and/or decorated.