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http://dx.doi.org/10.6111/JKCGCT.2011.21.5.218

Sintered body characteristics of LAS by addition of CaCO3 and ZrO2 using a solid-state reaction  

Kim, Sang-Hun (KICET Icheon Branch)
Kang, Eun-Tae (School of Nano and Advanced Materials Engineering Gyeongsang National University)
Kim, Ung-Soo (KICET Icheon Branch)
Hwang, Kwang-Taek (KICET Icheon Branch)
Cho, Woo-Seok (KICET Icheon Branch)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.21, no.5, 2011 , pp. 218-224 More about this Journal
Abstract
LAS ($Li_2O-Al_2O_3-SiO_2$) ceramics were sintered by a solid-state reaction. $CaCO_3$ and $ZrO_2$ were added to the ${\beta}$-spodumene ($Li_2O-Al_2O_3-4SiO_2$) composition of the LAS system for enhancement of sintering behavior and mechanical strength, respectively. We have investigated the sintering characteristics, microstructures, mechanical properties and thermal expansion characteristics according to the change of the amount of additive and sintering temperature of the ${\beta}$-spodumene. At 0.1 mol% $CaCO_3$, the densification of ${\beta}$-spodumene was significantly improved. At 0.04 mol% $ZrO_2$, the strength of ${\beta}$-spodumene was also improved. For all the selected all compositions, the thermal expansion coefficient was measured by a dilatometer, which revealed 1.2 to $1.7{\times}10^6/^{\circ}C$.
Keywords
Low thermal expansion; LAS ($Li_2O-Al_2O_3-SiO_2$); Sintering characteristics;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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