Zhao, Changhao ; Zhang, Mao-Hua ; Rödel, Jürgen ; Koruza, Jurij (2022)
Extrinsic and intrinsic contributions to the electrostrain in precipitation-hardened barium calcium titanate.
In: Applied Physics Letters, 121 (16)
doi: 10.1063/5.0115726
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Deconvoluting the extrinsic and intrinsic contributions to electrostrain is of great importance to understand the hardening mechanism of piezoceramics. Here, in situ electric-field high-energy x-ray diffraction measurements are performed to investigate the polycrystalline barium calcium titanate hardened by precipitation, a recently developed hardening technique that pins domain walls with fine intragranular precipitates. The effect of precipitates on extrinsic and intrinsic mechanisms is examined. Under a low-frequency and large-signal field, the precipitates suppress non-180 wall motion, which is the major source of loss, by 40%. Anisotropy is observed in the field-induced lattice strain, which is dominantly contributed by an intergranular effect instead of pure piezoelectricity. At small fields, the lattice strain is barely affected by precipitates, while both lattice strain and strain from non-180 domain wall motion are suppressed and are coupled with each other at large fields, leading to an unchanged relative percentage of the extrinsic contribution.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Zhao, Changhao ; Zhang, Mao-Hua ; Rödel, Jürgen ; Koruza, Jurij |
| Art des Eintrags: | Bibliographie |
| Titel: | Extrinsic and intrinsic contributions to the electrostrain in precipitation-hardened barium calcium titanate |
| Sprache: | Englisch |
| Publikationsjahr: | 25 Oktober 2022 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Physics Letters |
| Jahrgang/Volume einer Zeitschrift: | 121 |
| (Heft-)Nummer: | 16 |
| DOI: | 10.1063/5.0115726 |
| Kurzbeschreibung (Abstract): | Deconvoluting the extrinsic and intrinsic contributions to electrostrain is of great importance to understand the hardening mechanism of piezoceramics. Here, in situ electric-field high-energy x-ray diffraction measurements are performed to investigate the polycrystalline barium calcium titanate hardened by precipitation, a recently developed hardening technique that pins domain walls with fine intragranular precipitates. The effect of precipitates on extrinsic and intrinsic mechanisms is examined. Under a low-frequency and large-signal field, the precipitates suppress non-180 wall motion, which is the major source of loss, by 40%. Anisotropy is observed in the field-induced lattice strain, which is dominantly contributed by an intergranular effect instead of pure piezoelectricity. At small fields, the lattice strain is barely affected by precipitates, while both lattice strain and strain from non-180 domain wall motion are suppressed and are coupled with each other at large fields, leading to an unchanged relative percentage of the extrinsic contribution. |
| Zusätzliche Informationen: | Artikel-ID: 162904 |
| 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: | 26 Okt 2022 06:33 |
| Letzte Änderung: | 26 Okt 2022 07:00 |
| PPN: | 500771359 |
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