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Journal of the Korean Ceramic Society 1997;34(2): 123. |
| $(1-x)(Sr_a.Pb_b.Ca_c)TiO_3-xB_i2O_3.TiO_2$계에서의 $Bi_2O_3.3TiO_2$ 및 $MnO_2$첨가에 따른 유전특성에 관한 연구 |
| 박상도, 이응상 |
| 한양대학교 무기재료공학과 |
| The Dielectrical Properties of $(1-x)(Sr_a.Pb_b.Ca_c)TiO_3-xB_i2O_3.TiO_2$ system affected by $Bi_2O_3.3TiO_2$ amounts and $MnO_2$ |
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| ABSTRACT |
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In this study, (Sr.Pb.Ca)TiO3-Bi2O3.3TiO2(SPCT) systems were investigated to develop a new material which has a high dielectric constant, a low dielectric loss and a small TCC(Temperature Coefficient of Capa-citance), and are suitable for high voltage applications as a function of the additions of Bi2O3.3TiO2 from 5 mol.% to 9 mol.%. The result obtained from our investigation showed that up to 6 mol.% Bi2O3.3TiO ad-dition the dielectric constant increased and it deteriorated at higher concentrations with increasing amount of the acicular grains. As a result of some dopants (SiO2, Nb2O3, MnO2) addition to SPCT, the specimens with MnO2 showed good dielectric properties. The dielectric constant decreased, but the TCC was improved with the addition of MnO2 from 0.15 wt.% to 0.45 wt. %. |
| Key words:
Dielectric constant, Dielectric loss, TCC, Needle-grain |
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