caa a22 4500 463228103 CHVBK 20180405153233.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10853-007-1983-1 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1983-1 Nucleation behavior and microstructure of Al2O3-poor LAS glass-ceramics [Elektronische Daten] [K. Kim, S. Lee, J. Hwang, W. Seo] Influence of MgO and K2O on the nucleation behavior of Al2O3-poor LAS (Li2O-Al2O3-SiO2) base glasses was investigated by thermal analysis and, the effect on microstructure and surface topography of glass-ceramics was also examined by SEM, AFM and TEM. According to results of thermal analysis, the exothermic peak temperature of the glass showed a decrease with increase of nucleation temperature to nucleation time of 6h. But some glasses nucleated for 9h showed nucleation rate-like curve with maximum point. The dependence of reciprocal value of the exothermic peak temperature on the nucleation temperature indicated that an introduction of MgO might accelerate the nucleation of the base glass and thus result in rough surface topography of glass-ceramics. On the other hand, in the case of glass-ceramics containing K2O the main crystalline phase was lithium metasilicate and they showed fine microstructure resulting in smooth surface topography. TEM micrographs of as-quenched and nucleated glasses showed no trace of phase separation affecting nucleation or final microstructure. Springer Science+Business Media, LLC, 2007 Kim K. Department of Materials Science & Engineering, Kunsan National University, 573-701, Kunsan, Korea aut Lee S. Department of Materials Science & Engineering, Kunsan National University, 573-701, Kunsan, Korea aut Hwang J. Korea Institute of Ceramic Engineering & Technology, 153-801, Seoul, Korea aut Seo W. Korea Institute of Ceramic Engineering & Technology, 153-801, Seoul, Korea aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/24(2007-12-01), 10180-10187 0022-2461 42:24<10180 2007 42 10853 https://doi.org/10.1007/s10853-007-1983-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1983-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim K. Department of Materials Science & Engineering, Kunsan National University, 573-701, Kunsan, Korea aut NATIONALLICENCE 700 1- Lee S. Department of Materials Science & Engineering, Kunsan National University, 573-701, Kunsan, Korea aut NATIONALLICENCE 700 1- Hwang J. Korea Institute of Ceramic Engineering & Technology, 153-801, Seoul, Korea aut NATIONALLICENCE 700 1- Seo W. Korea Institute of Ceramic Engineering & Technology, 153-801, Seoul, Korea aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/24(2007-12-01), 10180-10187 0022-2461 42:24<10180 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer