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Journal of the Korean Ceramic Society 1996;33(4): 385. |
| $SiO_2-Al_2O_3-B_2O_3-RO-Na_2O$계 유리의 전지저항에 미치는 수식체의 영향 |
| 김대기, 김철영 |
| 인하대학교 무기재료공학과 |
| Effect of Modifiers on the Electrical Resistivity of $SiO_2-Al_2O_3-B_2O_3-RO-Na_2O$ Glasses |
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| ABSTRACT |
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The electrical resistivity of the ceramic glaze coated on ceramic substrate plays an important role on the characteristics of the thick and thin film electrical circuits. In this study the effects of the various modifiers on the electrical resistivity were examined in SiO2-Al2O3-B2O3-RO-Na2O (RO=CaO , SrO, BaO, PbO) glass system. In alkali free glasses where divalent cations are responsible for electrical conduction the electrical conductivity of th glasses increased with the ionic size of divalent cations due to the decrease in the bond strength between oxyben and divalent cation. In Na2O containing glasses however where Na+ ion is responsible for electrical conduction the ionic conductivity decreased with the ionic size of divalent cations because the blocking effect of the cations on Na+ ion movement increased with larger divalent cations. Na+ ionic conduction also depended on the glass structure relaxation due to the corrdination number changes of B2O3 and Al2O3 which varied with the NaO2 content in the glass. |
| Key words:
Ionic conduction, Ceramic glaze, Alkaki free glass, ionic size, Bond strength |
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