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J. Korean Ceram. Soc. > Volume 45(3); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(3): 157.
doi: https://doi.org/10.4191/kcers.2008.45.3.157
Minimizing the Water Leaching of Zincborate Glass by La2O3 Addition for LTCC Applications
Seung-Hyuk Hong, Eun-Hee Jung, Chang-Yong Oh1, Shin Kim, Hyun-Ho Shin
Department of Ceramic Engineering, Kangnung National University
1Temen Inc., Kangnung Science Industry Park
ABSTRACT
A series of $La_2O_3$-added zincborosilicate glasses was fabricated by systematically varying $La_2O_3$ addition up to 15mol% under the constraint of a ZnO:$B_2O_3$ ratio of 1:2. The degree of water leaching after ball milling of the prepared glasses in water medium was relatively quantified by the change in zinc peak intensity in energy dispersive spectroscopy. 8mol% of $La_2O_3$ was the most efficient addition in inhibiting the glass leaching by water. The role of $La_2O_3$ in inhibiting the leaching was explained in terms of change of structural units in the glass network. When the optimum 8mol% $La_2O_3$-added ZnO-$B_2O_3$ glass was used as sintering aid for $Al_2O_3$, the fabricated alumina-glass composite at $875^{circ}C$ demonstrated dielectric constant of 6.11 and quality factor of 15470 GHz, indicating the potential of leaching-minimized $La_2O_3-ZnO-B_2O_3$ glass for application to low temperature co-firing ceramic technology.
Key words: Water leaching, Glass$La_2O_3$, Zincborate, LTCC
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