| (1-x)Pb(Yb1/2Nb1/2)O3-xPbTiO3 (0.40 ≤ x ≤ 0.60) 고용계에서의 PbTiO3 치환에 따른 상전이 영역의 상전이 거동과 유전특성 |
| 김정현 |
| 국립한밭대학교 신소재공학부 응용소재공학과 |
| Phase Transition Behavior and Dielectric Properties of Morphotropic Phase Boundary in (1-x)Pb(Yb1/2Nb1/2)O3-xPbTiO3 (0.40 ≤ x ≤ 0.60) Solid Solutions |
| Jung-Hyun Kim |
| Department of Applied Materials Engineering, Hanbat National University |
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| ABSTRACT |
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In this study, crystal structural changes and dielectric properties of $(1-x)Pb(Yb_{1/2}Nb_{1/2})O_3-xPbTiO_3$ ((1-x)PYN-xPT) solid solutions were measured and analyzed with respect to the $PbTiO_3$ (PT) contents ($0.40{leq}x{leq}0.60$). From X-ray diffraction (XRD) measurements, (1-x)PYN-xPT solid solutions showed changes of the crystal structure from pseudocubic ($0.40{leq}x{leq}0.44$) to tetragonal ($0.52{leq}x{leq}0.60$) on increasing PT contents and exhibited the coexistence of pseudocubic and tetragonal phase near the morphotropic phase boundary (MPB) composition ($0.46{leq}x{leq}0.50$). The dielectric constant showed a maximum value at x = 0.46 and the maximum values in (1-x)PYN-xPT decreased with higher PT contents. The phase transition temperatures of (1-x)PYN-xPT solid solutions increased over the whole composition ranges tested ($0.40{leq}x{leq}0.60$). |
| Key words:
Complex perovskite, Solid solution, Phase transition, Morphotropic phase boundary (MPB), Dielectric constant |
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