Zheng, Mupeng ; Zhao, Changhao ; Rödel, Jürgen (2023)
Transitions from soft to hard piezoelectricity
of (Ba, Ca)(Ti, Zr)O3 ceramics via precipitation
hardening.
In: Applied Physics Letters, 122 (13)
doi: 10.1063/5.0146096
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Hard piezoelectrics are essential for high-power applications, the market share of which has increased significantly over the past few years. Acceptor-doping hardening, which relies on oxygen vacancies, has been proven to be a good practice to improve mechanical quality factors. However, the high mobility of oxygen vacancies restricts the use of acceptor-doping hardening to low driving fields and temperatures. Here, we extend the design of hard-type piezoceramics via precipitation hardening and demonstrate its large potential in (Ba,Ca)(Ti,Zr)O3. A softto- hard transition has been realized in (Ba,Ca)(Ti,Zr)O3 ceramics with an introduction of precipitates, where the mechanical quality factor and coercive field increase by over 180% and 120%, respectively. Through synchrotron x-ray diffraction and Rayleigh analysis, it is revealed that the hardening effect is attributed to the inhibition of domain wall motion by the intragranular CaTiO3 precipitates. This precipitationhardening approach offers great potential for the design of hard piezoceramics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Zheng, Mupeng ; Zhao, Changhao ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Transitions from soft to hard piezoelectricity of (Ba, Ca)(Ti, Zr)O3 ceramics via precipitation hardening |
| Sprache: | Englisch |
| Publikationsjahr: | 30 März 2023 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Physics Letters |
| Jahrgang/Volume einer Zeitschrift: | 122 |
| (Heft-)Nummer: | 13 |
| DOI: | 10.1063/5.0146096 |
| Kurzbeschreibung (Abstract): | Hard piezoelectrics are essential for high-power applications, the market share of which has increased significantly over the past few years. Acceptor-doping hardening, which relies on oxygen vacancies, has been proven to be a good practice to improve mechanical quality factors. However, the high mobility of oxygen vacancies restricts the use of acceptor-doping hardening to low driving fields and temperatures. Here, we extend the design of hard-type piezoceramics via precipitation hardening and demonstrate its large potential in (Ba,Ca)(Ti,Zr)O3. A softto- hard transition has been realized in (Ba,Ca)(Ti,Zr)O3 ceramics with an introduction of precipitates, where the mechanical quality factor and coercive field increase by over 180% and 120%, respectively. Through synchrotron x-ray diffraction and Rayleigh analysis, it is revealed that the hardening effect is attributed to the inhibition of domain wall motion by the intragranular CaTiO3 precipitates. This precipitationhardening approach offers great potential for the design of hard piezoceramics. |
| Zusätzliche Informationen: | Artikel Id: 132904 |
| 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: | 31 Mär 2023 07:27 |
| Letzte Änderung: | 31 Mär 2023 07:27 |
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