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Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates
We show how sintering in different atmospheres affects the structural, microstructural, and functional properties of ~30 μm thick films of K(0.5)Na(0.5)NbO(3) (KNN) modified with 0.38 mol% K(5.4)Cu(1.3)Ta(10)O(29) and 1 mol% CuO. The films were screen printed on platinized alumina substrates and sin...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658548/ https://www.ncbi.nlm.nih.gov/pubmed/34885292 http://dx.doi.org/10.3390/ma14237137 |
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author | Kmet, Brigita Kuščer, Danjela Dutta, Soma Uršič, Hana Matavž, Aleksander Levassort, Franck Bobnar, Vid Malič, Barbara Benčan, Andreja |
author_facet | Kmet, Brigita Kuščer, Danjela Dutta, Soma Uršič, Hana Matavž, Aleksander Levassort, Franck Bobnar, Vid Malič, Barbara Benčan, Andreja |
author_sort | Kmet, Brigita |
collection | PubMed |
description | We show how sintering in different atmospheres affects the structural, microstructural, and functional properties of ~30 μm thick films of K(0.5)Na(0.5)NbO(3) (KNN) modified with 0.38 mol% K(5.4)Cu(1.3)Ta(10)O(29) and 1 mol% CuO. The films were screen printed on platinized alumina substrates and sintered at 1100 °C in oxygen or in air with or without the packing powder (PP). The films have a preferential crystallographic orientation of the monoclinic perovskite phase in the [100] and [−101] directions. Sintering in the presence of PP contributes to obtaining phase-pure films, which is not the case for the films sintered without any PP notwithstanding the sintering atmosphere. The latter group is characterized by a slightly finer grain size, from 0.1 μm to ~2 μm, and lower porosity, ~6% compared with ~13%. Using piezoresponse force microscopy (PFM) and electron backscatter diffraction (EBSD) analysis of oxygen-sintered films, we found that the perovskite grains are composed of multiple domains which are preferentially oriented. Thick films sintered in oxygen exhibit a piezoelectric d(33) coefficient of 64 pm/V and an effective thickness coupling coefficient k(t) of 43%, as well as very low mechanical losses of less than 0.5%, making them promising candidates for lead-free piezoelectric energy harvesting applications. |
format | Online Article Text |
id | pubmed-8658548 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86585482021-12-10 Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates Kmet, Brigita Kuščer, Danjela Dutta, Soma Uršič, Hana Matavž, Aleksander Levassort, Franck Bobnar, Vid Malič, Barbara Benčan, Andreja Materials (Basel) Article We show how sintering in different atmospheres affects the structural, microstructural, and functional properties of ~30 μm thick films of K(0.5)Na(0.5)NbO(3) (KNN) modified with 0.38 mol% K(5.4)Cu(1.3)Ta(10)O(29) and 1 mol% CuO. The films were screen printed on platinized alumina substrates and sintered at 1100 °C in oxygen or in air with or without the packing powder (PP). The films have a preferential crystallographic orientation of the monoclinic perovskite phase in the [100] and [−101] directions. Sintering in the presence of PP contributes to obtaining phase-pure films, which is not the case for the films sintered without any PP notwithstanding the sintering atmosphere. The latter group is characterized by a slightly finer grain size, from 0.1 μm to ~2 μm, and lower porosity, ~6% compared with ~13%. Using piezoresponse force microscopy (PFM) and electron backscatter diffraction (EBSD) analysis of oxygen-sintered films, we found that the perovskite grains are composed of multiple domains which are preferentially oriented. Thick films sintered in oxygen exhibit a piezoelectric d(33) coefficient of 64 pm/V and an effective thickness coupling coefficient k(t) of 43%, as well as very low mechanical losses of less than 0.5%, making them promising candidates for lead-free piezoelectric energy harvesting applications. MDPI 2021-11-24 /pmc/articles/PMC8658548/ /pubmed/34885292 http://dx.doi.org/10.3390/ma14237137 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kmet, Brigita Kuščer, Danjela Dutta, Soma Uršič, Hana Matavž, Aleksander Levassort, Franck Bobnar, Vid Malič, Barbara Benčan, Andreja Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates |
title | Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates |
title_full | Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates |
title_fullStr | Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates |
title_full_unstemmed | Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates |
title_short | Screen Printed Copper and Tantalum Modified Potassium Sodium Niobate Thick Films on Platinized Alumina Substrates |
title_sort | screen printed copper and tantalum modified potassium sodium niobate thick films on platinized alumina substrates |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658548/ https://www.ncbi.nlm.nih.gov/pubmed/34885292 http://dx.doi.org/10.3390/ma14237137 |
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