Glass-ceramics processing properties

Particularly Favorable Properties of Glass-Ceramics Processing properties... 

Kokubo, T. (1993) AAV glass-ceramic processing and properties, in Introduction to Bioceramics (eds L.L. Hench and J. Wilson), World Scientific Publishers, London and Singapore, pp. 75-88. 

Kokubo, T. (1993). A-W Glass-Ceramic Processing and Properties. In L.L.Hench J. Wilson editors. Introduction to Bioceramcs (75-88). Singapore. 

Kokubo, T. AAV glass-ceramic Processing and properties. In Hench LL, Wilson J. editors. An Introduction to Bioceramics. Singapore World Scientific 1993 75-88. 

Post-heat treatment of glass induces phase separation and crystalliza tion A very precise secondary heat treatment is necessary to develop and control photochromic properties. Glass-ceramics receive a thermal ceramming process that induces crystallization... 

A clay mass is a mixture of clay and additives for a specific ceramic (processing) technique. The clay provides the plastic properties. Possible additives are a flux and a filler. Some examples of fluxes are potassium feldspar, bone meal, volcanic ashes and ground glass, all of which serve to affect the density and decrease the melting range. Fillers reduce the shrinkage as well as the sticky character of the clay. 

Oxynitride glasses may be heat treated to form glass-ceramics, effectively multi-phase composites. The process involves heat treatment at two different temperatures, firstly to induce nucleation, then to allow crystal growth of the nuclei. The crystalline phases formed depend on both the composition of the parent glass and the temperatures used for heat treatment. The extent of their formation and growth, the relative amounts and distributions of different phases (including residual glass) and their characteristics will determine the overall properties of the particular composite. The formation of these types of materials and their properties is outlined below. 

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