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J. Korean Ceram. Soc. > Volume 22(5); 1985 > Article
Journal of the Korean Ceramic Society 1985;22(5): 29.
KCI 용융염 합성법에 의한 $BaTiO_3$ 의 PTCR 효과
윤기현, 이은홍
연세대학교 공과대학 요업공학과
PTCR Effects in KCI Molten Salt Synthesized $BaTiO_3$
The PTCR characteristics of the $BaTiO_3$ as a function of the molten KCl and dopant $Sb_2O_3$ were investitated. When the weight ratio of KCl to raw materials was above 0.1, $BaTiO_3$ was synthesized by calcining at 80$0^{circ}C$ for 6 hrs. As the amount of the KCl increased the resistivity of the $BaTiO_3$ at room temperature incr-eased. This can be explained by charge compensation effect between electrons and holes and with microstruc-tures change of the specimens. The resistivity of the $BaTiO_3$ decreased with increasing amount of $Sb_2O_3$. In the time-current characteristics initial current decreased with increasing the ratio of KCl to raw materials but initial current increased and then decreased with the increase of the dopant $Sb_2O_3$. These results of the time-current characteristics can be explained by the resistivity-temperature characteristics.
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