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Influence of BaO Addition on the Phase Formation Characteristics in Li2O–Al2O3–ZnO–SiO2–TiO2–ZrO2 Glass

Published online by Cambridge University Press:  31 January 2011

Yun-Mo Sung
Yun-Mo Sung
Affiliation:
Functional Nanostructured Materials Laboratory (FNML), Department of Materials Science & Engineering, Daejin University, Pochun-koon, Kyunggi-do 487–711, South Korea
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Abstract

The effect of BaO addition on the crystallization of Li2O–Al2O3–ZnO–SiO2–TiO2– ZrO2 (LAZSTZ) glass was investigated and discussed. The crystallization temperature of BaO-added LAZSTZ precursor glass (LBAZSTZ) was decreased due to the increase in the number of broken ionic bonds, while the transparency of the glass–ceramic was maintained. The lowered activation energy for crystallization in LBAZSTZ glass strongly supports the increase in the number broken bonds. During heating LBAZSTZ glass, phase separation did not occur most probably due to the competition between metal cations having a certain degree of ionic field strength. The formation of β-spodumene as a major phase in LBAZSTZ glass–ceramic was identified using x-ray diffraction.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 3 , March 2002 , pp. 517 - 520
Copyright
Copyright © Materials Research Society 2002

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