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<p>A single-phase 0.65PbMg<sub>1/3</sub>Nb<sub>2/3</sub>O<sub>3</sub>-0.35PbTiO<sub>3</sub> (65PMN-35PT) ceramic was synthesized at a relatively low temperature (875 <sup>o</sup>C) using a modified columbite method. X-ray diffraction analysis confirmed the single-phase formation of perovskite 65PMN-35PT with a tetragonal structure. Morphological studies indicated that the sample consisted of small grains with a size of ≤ 2 <i>µ</i>m. The dielectric properties of the material demonstrate its relaxor behavior near the ferroelectric transition temperature, <i>T</i><sub>C</sub> = 457&#xa0;K. The saturation and remnant polarization values of approximately 25.9 and 20.1 <i>µ</i>C cm<sup>−2</sup> were achieved for an electrically poled sample. Additionally, the poling induced a negative internal electric field of about − 0.2&#xa0;kV cm<sup>−1</sup> was detected due to the presence of ferroelectric nano-grains in this bulk 65PMN-35PT sample. These observed characteristics of the pyrochlore-free 65PMN-35PT ceramic are similar to those of its single-crystal counterpart.</p>

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Structural, dielectric, and ferroelectric characteristics of the low-temperature sintered 65PMN-35PT sample for electroceramic applications

  • 期刊论文

  • 发表日期：

    2025年7月8日

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  • Ramachandran Balakrishnan,
  • Sudarshan Narayanan,
  • Mangamma Geramilla,
  • Mamidanna S. Ramachandra Rao

摘要

A single-phase 0.65PbMg1/3Nb2/3O3-0.35PbTiO3 (65PMN-35PT) ceramic was synthesized at a relatively low temperature (875 oC) using a modified columbite method. X-ray diffraction analysis confirmed the single-phase formation of perovskite 65PMN-35PT with a tetragonal structure. Morphological studies indicated that the sample consisted of small grains with a size of ≤ 2 µm. The dielectric properties of the material demonstrate its relaxor behavior near the ferroelectric transition temperature, TC = 457 K. The saturation and remnant polarization values of approximately 25.9 and 20.1 µC cm−2 were achieved for an electrically poled sample. Additionally, the poling induced a negative internal electric field of about − 0.2 kV cm−1 was detected due to the presence of ferroelectric nano-grains in this bulk 65PMN-35PT sample. These observed characteristics of the pyrochlore-free 65PMN-35PT ceramic are similar to those of its single-crystal counterpart.