Leucite-based glass-ceramics

Glass-ceramics based on leucite, K[AlSi2O6], show exceptional biocompatibility. Apart from their good chemical, physical and mechanical properties, this type of glass-ceramic is well suited for computer aided machining. This type of glass-ceramic is produced by a method in which the nucleation and crystallization of a base glass is controlled. The base glass is composed in the K2O-Al2O3-SiO2 system and important additives that influence both nucleation and crystallization. As a result of the controlled surface activation of the base glass by fine grinding and subsequently heat treating it, leucite crystals are precipitated. The final product shows a crystal content of 35 to 45 vol % with a crystallite size of 1-5 μm

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