Zeitschriften & Reihen

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Crystallization of osumilite from modified basaltic glasses
(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2003) El-Shennawe, Ahmed W. A.; Abdel-Hameed, Salwa A. M.
Osumilite-type phases, which have high temperature stability and low linear thermal expansion coefficients, were crystallized from modified basalt glass composition. To satisfy the compositional requirements of osumilite molecules, a deliberate amount of kaolin, sand, magnesite and TiO2 should be added to the basalt. The crystallization process was investigated by DTA, X-ray diffractometry and SEM. The effect of compositional changes on bulk crystallization and growth morphology was also studied. The linear thermal expansion coefficient was measured to characterize the produced glass-ceramics.
Development of wall-covering glass-ceramics from raw materials
(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2002) Abdel-Hameed, Salwa A. M.
The possibihty of producing wall-covering glass-ceramic materials from raw materials by crystallization of the glass is demonstrated. Glass-ceramics based on β-wollastonite and diopside with various ratios were designed from raw materials such as limestone and dolomite. The phases crystallized were examined by X-ray analysis. Thermal expansion and mechanical properties such as bending strength and microhardness for glasses and glass-ceramics were measured.