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Journal of the Korean Ceramic Society 1998;35(2): 123. |
| Pb(Mg1/3Nb2/3)O3-PbTiO3계의 조성변화에 의한 다층 콘덴서 물성 |
| 김복희 |
| 전북대학교 공과대학 신소재공학부 신소재개발연구소 |
| Properties of Multilyer Condensor with Composition Change in the System of Pb(Mg1/3Nb2/3)O3-PbTiO3 |
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| ABSTRACT |
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Multilayer ceramic capacitors(MLCC) were prepared by laminating the layer of composition with dif-ferent Curie temperature to improve temperature coefficient in the Pb(Mg1/3Nb2/3)O3-PbTiO3 binary system. Green sheet was formed by tape casting using Pb(Mg1/3Nb2/3)O3-PbTiO3 and PbTiO3 synthesized with solid state reaction of PBO. Nb2O5 MgO and TiO2. Green sheet with electrode of 70Ag-30Pd was laminated under 300 kg/cm2 at 70$^{circ}C$ and sintered at 1100$^{circ}C$ for 2hr. Curie temperatues for MLCC with 10 layers of pure PMN and 0.9PMN-0.1PT were lowered to -22$^{circ}C$ and 36$^{circ}C$ respectively. MLCC with 7 layers of PMN and 3 layers of 0.9PMN-0.1PT showed nearly zero temperature coefficient of capacitance in the range of -20∼30$^{circ}C$ and sum of dissipation factor of each layer. |
| Key words:
Tape casting, MLCC, Pb(Mg1/3Nb2/3)O3-PbTiO3, Temperature coefficient of capacitance, Curie temperature |
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