Ren, Pengrong ; Wang, Yike ; Fang, Xufei ; Hofmann, Kathrin ; Kodumudi Venkataraman, Lalitha (2021)
A new family of high temperature lead-free Na1/2Bi1/2TiO3-BiFeO3 piezoelectrics.
In: Materials Today Physics, 21
doi: 10.1016/j.mtphys.2021.100526
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The surge of interest in the search for lead-free alternatives in the past two decades has identified Na1/2Bi1/2TiO3-based materials to exhibit high strain, large mechanical quality factor, high temperature conductivity and temperature-stable permittivity. Nevertheless, the low depolarization temperature (Td) has been a major concern. This work reports the (1-x)Na1/2Bi1/2TiO3-xBiFeO3 solid solution processed using the quenching strategy to exhibit high Td that surpasses that of major Na1/2Bi1/2TiO3 class of materials. Upon quenching the sample, Td of Na1/2Bi1/2TiO3 with 60 mol% BiFeO3 considerably increases from 380 °C to 640 °C, while retaining the piezoelectric coefficient, d33z57 pC/N. The d33 value is nearly double that of traditional bismuth-layered high temperature piezoelectrics. The role of quenchinginduced thermal stability of d33 is substantiated by annealing investigations below 800 °C. The enhancement of Td is ascribed to the increased latticed distortion and enlarged domain size upon quenching. The practical feasibility of quenching is further substantiated by the similar hardness for the furnace cooled and quenched specimens, indicating comparable mechanical strength.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Ren, Pengrong ; Wang, Yike ; Fang, Xufei ; Hofmann, Kathrin ; Kodumudi Venkataraman, Lalitha |
| Art des Eintrags: | Bibliographie |
| Titel: | A new family of high temperature lead-free Na1/2Bi1/2TiO3-BiFeO3 piezoelectrics |
| Sprache: | Englisch |
| Publikationsjahr: | 22 September 2021 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials Today Physics |
| Jahrgang/Volume einer Zeitschrift: | 21 |
| DOI: | 10.1016/j.mtphys.2021.100526 |
| URL / URN: | https://www.sciencedirect.com/science/article/abs/pii/S25425... |
| Kurzbeschreibung (Abstract): | The surge of interest in the search for lead-free alternatives in the past two decades has identified Na1/2Bi1/2TiO3-based materials to exhibit high strain, large mechanical quality factor, high temperature conductivity and temperature-stable permittivity. Nevertheless, the low depolarization temperature (Td) has been a major concern. This work reports the (1-x)Na1/2Bi1/2TiO3-xBiFeO3 solid solution processed using the quenching strategy to exhibit high Td that surpasses that of major Na1/2Bi1/2TiO3 class of materials. Upon quenching the sample, Td of Na1/2Bi1/2TiO3 with 60 mol% BiFeO3 considerably increases from 380 °C to 640 °C, while retaining the piezoelectric coefficient, d33z57 pC/N. The d33 value is nearly double that of traditional bismuth-layered high temperature piezoelectrics. The role of quenchinginduced thermal stability of d33 is substantiated by annealing investigations below 800 °C. The enhancement of Td is ascribed to the increased latticed distortion and enlarged domain size upon quenching. The practical feasibility of quenching is further substantiated by the similar hardness for the furnace cooled and quenched specimens, indicating comparable mechanical strength. |
| Freie Schlagworte: | Na1/2Bi1/2TiO3-BiFeO3, High temperature piezoelectrics, Lattice distortion, Quenching |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 01 Okt 2021 06:10 |
| Letzte Änderung: | 01 Okt 2021 06:10 |
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