Liu, Hairui ; Veber, Philippe ; Koruza, Jurij ; Rytz, Daniel ; Josse, Michael ; Rödel, Jürgen ; Maglione, Mario (2016):
Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PCoriented (Li,Na,K)IJNb,Ta)O3 single crystals.
In: CrystEngComm, 18, pp. 2081-2088. RSC Publishing, ISSN 1466-8033,
[Article]
Abstract
A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method. Effective segregation of the elements was considered in order to further develop the growth of Li+- and Ta5+-modified (Na,K)NbO3 single crystals. The crystallographic structure and electrical behaviour along the [001]PC orientation were studied. X-ray diffraction, Raman spectroscopy and dielectric studies reveal that the increase in Ta5+ content reduces the orthorhombic–tetragonal phase transition. Bipolar and unipolar strain curves were investigated at 2 kV mm−1. The highest bipolar and unipolar strains associated with a largesignal piezoelectric constant of 368 pm V−1 were achieved for Li0.02Na0.626K0.354Nb0.808Ta0.192O3. The asymmetric bipolar strain curves were observed and related to the existence of internal bias fields induced (V'a-Vo) by defect dipoles, which were created during the crystal growth process.
| Item Type: | Article |
|---|---|
| Erschienen: | 2016 |
| Creators: | Liu, Hairui ; Veber, Philippe ; Koruza, Jurij ; Rytz, Daniel ; Josse, Michael ; Rödel, Jürgen ; Maglione, Mario |
| Title: | Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PCoriented (Li,Na,K)IJNb,Ta)O3 single crystals |
| Language: | English |
| Abstract: | A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method. Effective segregation of the elements was considered in order to further develop the growth of Li+- and Ta5+-modified (Na,K)NbO3 single crystals. The crystallographic structure and electrical behaviour along the [001]PC orientation were studied. X-ray diffraction, Raman spectroscopy and dielectric studies reveal that the increase in Ta5+ content reduces the orthorhombic–tetragonal phase transition. Bipolar and unipolar strain curves were investigated at 2 kV mm−1. The highest bipolar and unipolar strains associated with a largesignal piezoelectric constant of 368 pm V−1 were achieved for Li0.02Na0.626K0.354Nb0.808Ta0.192O3. The asymmetric bipolar strain curves were observed and related to the existence of internal bias fields induced (V'a-Vo) by defect dipoles, which were created during the crystal growth process. |
| Journal or Publication Title: | CrystEngComm |
| Journal volume: | 18 |
| Publisher: | RSC Publishing |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials |
| Date Deposited: | 23 Mar 2016 13:01 |
| Identification Number: | doi:10.1039/c5ce02581h |
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