caa a22 4500 463221125 CHVBK 20180405153212.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10853-006-1045-0 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1045-0 Microstructure and stresses in a keatite solid-solution glass-ceramic [Elektronische Daten] [Christian Roos, Otmar Becker, Friedrich Siebers] The microstructure of a translucent keatite solid-solution glass-ceramic (keatite s.s.) of the LAS-system (Li2O-Al2O3-SiO2) has been analyzed with SEM, AFM, XRF, XRD, and TEM. The glass-ceramic consists mainly of keatite s.s. with minor secondary phases such as zirconium titanate, gahnite and probably rutile. Furthermore the resistance to temperature differences (RTD) of this glass-ceramic was investigated. It is shown that, in spite of the relatively high coefficient of thermal expansion (CTE) of about 1×10−6K−1, an improved RTD can be achieved by special ceramization treatment. With this, compressive stresses in the first 100μm to 150μm are induced. These stresses can presumably be contributed to a difference in CTE between the surface-near zone and the bulk. Said CTE difference is caused by chemical gradients of CTE-relevant elements, such as Zn, K, and supposedly additional alkali elements such as Li. These stresses are useful to increase the strength and application range of glass-ceramics based on keatite s.s. Springer Science+Business Media, LLC, 2006 Roos Christian Corporate Research and Technology Development, SCHOTT AG, Hattenbergstraße 10, 55122, Mainz, Germany aut Becker Otmar Corporate Research and Technology Development, SCHOTT AG, Hattenbergstraße 10, 55122, Mainz, Germany aut Siebers Friedrich Corporate Research and Technology Development, SCHOTT AG, Hattenbergstraße 10, 55122, Mainz, Germany aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/1(2007-01-01), 50-58 0022-2461 42:1<50 2007 42 10853 https://doi.org/10.1007/s10853-006-1045-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1045-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Roos Christian Corporate Research and Technology Development, SCHOTT AG, Hattenbergstraße 10, 55122, Mainz, Germany aut NATIONALLICENCE 700 1- Becker Otmar Corporate Research and Technology Development, SCHOTT AG, Hattenbergstraße 10, 55122, Mainz, Germany aut NATIONALLICENCE 700 1- Siebers Friedrich Corporate Research and Technology Development, SCHOTT AG, Hattenbergstraße 10, 55122, Mainz, Germany aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/1(2007-01-01), 50-58 0022-2461 42:1<50 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer