Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Minimizing the Water Leaching of Zincborate Glass by La2O3 Addition for LTCC Applications

  • Hong, Seung-Hyuk (Department of Ceramic Engineering, Kangnung National University) ;
  • Jung, Eun-Hee (Department of Ceramic Engineering, Kangnung National University) ;
  • Oh, Chang-Yong (Temen Inc., Kangnung Science Industry Park) ;
  • Kim, Shin (Department of Ceramic Engineering, Kangnung National University) ;
  • Shin, Hyun-Ho (Department of Ceramic Engineering, Kangnung National University)
  • Published : 2008.03.31
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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.

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References

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