Structural and Electrical Characteristics of (1−x)Pb(Lu1/2Nb1/2)O3–xPbTiO3 Ceramics with Low PbTiO3 |
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| Authors: | Xiaoming Yang Chao He Ying Liu Xiuzhi Li Zujian Wang Shujuan Han Shilie Pan Xifa Long |
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| Affiliation: | 1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China;2. Key Laboratory of Functional Materials and Devices for Special Environments of CAS;3. Xinjiang Technical Institute of Physics & Chemistry of CAS;4. Xinjiang Key Laboratory of Electronic Information Materials and Devices, Urumqi, China |
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| Abstract: | A solid solution of (1?x)Pb(Lu1/2Nb1/2)O3–xPbTiO3 with composition of 0.01 ≤ x ≤ 0.08 have been prepared successfully. XRD analysis indicates the crystal structure adopts an orthorhombic (O) phase in 0.01 ≤ x ≤ 0.06 interval and becomes the coexistence of O and rhombohedral (R) phase at x = 0.07, then turns into R phase mostly at x = 0.08. In addition, two sets of superlattice reflections due to B‐site ordering and antiparallel cation displacement are distinguished by XRD and the superstructures which arise from antiparallel cation displacement disappear gradually with the increasing x. The grain size increases gradually with the increasing x, and then becomes the bimodal microstructure at x ≥ 0.06 due to the coexistence of O and R phase. The dielectric spectra exhibit Curie temperature decreases from 248°C to 147°C with increasing x from 0.01 to 0.08. As 0.01 ≤ x ≤ 0.04, the samples display typical double hysteresis loops, suggesting antiferroelectric nature, then turn into ferroelectric gradually at x = 0.05. Finally, it exhibit typical ferroelectric hysteresis loops in 0.06 ≤ x ≤ 0.08 interval. |
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| Keywords: | dielectric materials/properties electrical properties ferroelectricity/ferroelectric materials microstructure phase transformations |
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