Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature
Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> (BCZT8-5) ceramic materials have been scarcely studied as lead-free piezo/ferroelectrics despite their enhanced Curie temperature (>100 °C) with respect to...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/6/2268 |
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| author | Ana Cristina Hernández-Moreno Armando Reyes-Montero Brenda Carreño-Jiménez Mónica Acuautla Lorena Pardo |
| author_facet | Ana Cristina Hernández-Moreno Armando Reyes-Montero Brenda Carreño-Jiménez Mónica Acuautla Lorena Pardo |
| author_sort | Ana Cristina Hernández-Moreno |
| collection | DOAJ |
| description | Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> (BCZT8-5) ceramic materials have been scarcely studied as lead-free piezo/ferroelectrics despite their enhanced Curie temperature (>100 °C) with respect to most studied BCZT compositions. In this work, homogeneous dense BCZT8-5 ceramics with grain size in the range of 20 μm, and optimum ferroelectric, dielectric, and electromechanical performance, were prepared by the mixed oxides route using moderate synthesis (1250 °C-2 h) and sintering (1400 °C-2 h) conditions. Thickness-poled thin disks and monomodal shear plate resonators were used for the determination of piezoelectric coefficients, coupling factors, elastic, and dielectric permittivity coefficients, including all losses, by iterative analysis of impedance curves at resonance. Furthermore, the thermal evolution of the piezoelectric characteristics at resonance was determined to assess the enhanced working range of the ceramics (≈100 °C). Ferroelectric hysteresis loops and strains vs. electric-field butterfly loops were also measured and showed soft behavior with E<sub>c</sub> = 2 kV/cm, P<sub>r</sub> = 12 μC/cm<sup>2</sup> after a maximum applied field of 3 kV was used. The ceramics showed a high endurance of P-E cycles to electrical fatigue up to 10<sup>7</sup> cycles. Moreover, dielectric properties as a function of temperature were also accomplished and showed nearly normal ferroelectric behavior, characteristic of samples with low crystallographic disorder. Overall, these ceramics showed high sensitivity and higher stability than other currently studied BCZT compositions. |
| first_indexed | 2024-03-11T06:15:04Z |
| format | Article |
| id | doaj.art-268289affe8c4613a4ddd856fa781824 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T06:15:04Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-268289affe8c4613a4ddd856fa7818242023-11-17T12:19:52ZengMDPI AGMaterials1996-19442023-03-01166226810.3390/ma16062268Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie TemperatureAna Cristina Hernández-Moreno0Armando Reyes-Montero1Brenda Carreño-Jiménez2Mónica Acuautla3Lorena Pardo4Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Cd. Universitaria, Coyoacán C.P. 04510, CDMX, MexicoInstituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Cd. Universitaria, Coyoacán C.P. 04510, CDMX, MexicoUnidad Morelia Del Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro No. 8701, Col. Ex Hacienda de San José de La Huerta, Morelia C.P. 58190, Michoacán, MexicoFaculty of Science and Engineering, University of Groningen, Groningen 4, 9747 AG Groningen, The NetherlandsInstituto de Ciencia de Materiales de Madrid, ICMM-CSIC, c/Sor Juana Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, SpainBa<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> (BCZT8-5) ceramic materials have been scarcely studied as lead-free piezo/ferroelectrics despite their enhanced Curie temperature (>100 °C) with respect to most studied BCZT compositions. In this work, homogeneous dense BCZT8-5 ceramics with grain size in the range of 20 μm, and optimum ferroelectric, dielectric, and electromechanical performance, were prepared by the mixed oxides route using moderate synthesis (1250 °C-2 h) and sintering (1400 °C-2 h) conditions. Thickness-poled thin disks and monomodal shear plate resonators were used for the determination of piezoelectric coefficients, coupling factors, elastic, and dielectric permittivity coefficients, including all losses, by iterative analysis of impedance curves at resonance. Furthermore, the thermal evolution of the piezoelectric characteristics at resonance was determined to assess the enhanced working range of the ceramics (≈100 °C). Ferroelectric hysteresis loops and strains vs. electric-field butterfly loops were also measured and showed soft behavior with E<sub>c</sub> = 2 kV/cm, P<sub>r</sub> = 12 μC/cm<sup>2</sup> after a maximum applied field of 3 kV was used. The ceramics showed a high endurance of P-E cycles to electrical fatigue up to 10<sup>7</sup> cycles. Moreover, dielectric properties as a function of temperature were also accomplished and showed nearly normal ferroelectric behavior, characteristic of samples with low crystallographic disorder. Overall, these ceramics showed high sensitivity and higher stability than other currently studied BCZT compositions.https://www.mdpi.com/1996-1944/16/6/2268Curie temperatureBCTZpiezo/ferroelectriclead-free |
| spellingShingle | Ana Cristina Hernández-Moreno Armando Reyes-Montero Brenda Carreño-Jiménez Mónica Acuautla Lorena Pardo Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature Materials Curie temperature BCTZ piezo/ferroelectric lead-free |
| title | Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature |
| title_full | Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature |
| title_fullStr | Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature |
| title_full_unstemmed | Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature |
| title_short | Ferroelectric, Dielectric and Electromechanical Performance of Ba<sub>0.92</sub>Ca<sub>0.08</sub>Ti<sub>0.95</sub>Zr<sub>0.05</sub>O<sub>3</sub> Ceramics with an Enhanced Curie Temperature |
| title_sort | ferroelectric dielectric and electromechanical performance of ba sub 0 92 sub ca sub 0 08 sub ti sub 0 95 sub zr sub 0 05 sub o sub 3 sub ceramics with an enhanced curie temperature |
| topic | Curie temperature BCTZ piezo/ferroelectric lead-free |
| url | https://www.mdpi.com/1996-1944/16/6/2268 |
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