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<p>For efficient waste ambient energy harvesting, high piezoelectric charge coefficient (<i>d</i><sub>33</sub>) and pyroelectric coefficients (<i>π</i>) with low dielectric constant (<i>ε</i>) are anticipated. A high degree of correlation among <i>d</i><sub>33</sub>, <i>π</i> and <i>ε</i> parameters restrict energy harvesting efficiency. Morphotropic phase boundary (MPB) based compounds demonstrate technologically appealing characteristics – enhanced dielectric, piezoelectric and pyroelectric properties, provide opportunity to realize optimized figure of merits (FOMs). PbTiO<sub>3</sub>, a promising piezoelectric and ferroelectric material, is compositionally tuned with Pb(Mg<sub>0.33</sub>Nb<sub>0.67</sub>)O<sub>3</sub> to realize MPB driven exotic characteristics. Here, we synthesized a series of MPB based solid solutions (1-x) Pb(Mg<sub>0.33</sub>Nb<sub>0.67</sub>)O<sub>3</sub>-(x)PbTiO<sub>3</sub> (<i>x</i>= 0.28, 0.29, 0.30 and 0.31) [PMN-PT] using the solid-state route. Enhanced piezoelectric properties were observed for the composition <i>x</i> = 0.29, including piezoelectric charge coefficient (<i>d</i><sub>33</sub>) of ~320 pC/N, piezoelectric voltage coefficient (<i>g</i><sub>33</sub>) ~ 0.0084 Vm/N, and transducer coefficient (<i>d</i><sub>33</sub> × <i>g</i><sub>33</sub>) ~ 2784 × 10<sup>-15</sup> m<sup>2</sup>/N. Furthermore, the <i>x</i> = 0.29 composition demonstrated high potential for thermoelectric energy conversion, as revealed by Olsen cycle analysis. Present study emphasizes on Olsen cycle based thermoelectric performance of a material further assessed qualitatively using the Arrott plot approach.</p>

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Thermal probing of morphotropic phase boundary of Pb(Mg0.33Nb0.67) O3-PbTiO3: arrott plot as pyroelectric figure of merit

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Shubham Modgil,
  • Mukul Kumar,
  • Varun Kamboj,
  • Shobhna Dhiman,
  • OP Thakur,
  • Gyaneshwar Sharma,
  • Sanjeev Kumar

摘要

For efficient waste ambient energy harvesting, high piezoelectric charge coefficient (d33) and pyroelectric coefficients (π) with low dielectric constant (ε) are anticipated. A high degree of correlation among d33, π and ε parameters restrict energy harvesting efficiency. Morphotropic phase boundary (MPB) based compounds demonstrate technologically appealing characteristics – enhanced dielectric, piezoelectric and pyroelectric properties, provide opportunity to realize optimized figure of merits (FOMs). PbTiO3, a promising piezoelectric and ferroelectric material, is compositionally tuned with Pb(Mg0.33Nb0.67)O3 to realize MPB driven exotic characteristics. Here, we synthesized a series of MPB based solid solutions (1-x) Pb(Mg0.33Nb0.67)O3-(x)PbTiO3 (x= 0.28, 0.29, 0.30 and 0.31) [PMN-PT] using the solid-state route. Enhanced piezoelectric properties were observed for the composition x = 0.29, including piezoelectric charge coefficient (d33) of ~320 pC/N, piezoelectric voltage coefficient (g33) ~ 0.0084 Vm/N, and transducer coefficient (d33 × g33) ~ 2784 × 10-15 m2/N. Furthermore, the x = 0.29 composition demonstrated high potential for thermoelectric energy conversion, as revealed by Olsen cycle analysis. Present study emphasizes on Olsen cycle based thermoelectric performance of a material further assessed qualitatively using the Arrott plot approach.