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Journal of the Korean Ceramic Society 1981;18(2): 75. |
| $BaTiO_3$ 세라믹의 전기적성질(II) |
| 윤기현, 송효일, 윤상옥, 이형복 |
| 연세대학교 공과대학 요업공학과 |
| Electrical Property of $BaTiO_3$ Ceramics(II) |
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| ABSTRACT |
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The electrical conductivity of $(M_2O_3)_x (BaTiO_3)_{1-x}$ has been measured over the temperature range of 30 to 27$0^{circ}C$. The substitution of rare earth oxide such as $La_2O_3$, $Nd_2O_3$, or $Dy_2O_3$ can be represented by $M_2O_3$. The additional mole fraction of the rare earth oxide is ranged over 0.0015 to 0.0030. The electrical conductivity exhibits an anomalous decrease near the tetragonal to cubic transition about 12$0^{circ}C$. The decrease in the electrical conductivity is observed at the higher impurity concentrations owing to space charge layer. The increase in the electrical conductivity is observed as the impurity ion is varied from $La^{+3}$$Nd^{+3}$ to $Dy^{+3}$, due to overlap of 4f electrons of the inner shell. |
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