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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fritze, Holger
Clausthal University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Acoustic Loss in LiNb1−xTaxO3 at Temperatures up to 900 °C
- 2024Acoustic loss in LiNb1-xTaxO3 at temperatures up to 900 °C
- 2023Analysis of defect mechanisms in nonstoichiometric ceria–zirconia by the microwave cavity perturbation methodcitations
- 2023Chemical expansion of CeO2−δ and Ce0.8Zr0.2O2−δ thin films determined by laser Doppler vibrometry at high temperatures and different oxygen partial pressurescitations
- 2022Assembly and interconnection technology for high-temperature bulk acoustic wave resonatorscitations
- 2022In situ analysis of hydration and ionic conductivity of sulfonated poly(ether ether ketone) thin films using an interdigitated electrode array and a nanobalancecitations
- 2022Impact of electrode conductivity on mass sensitivity of piezoelectric resonators at high temperaturescitations
- 2021Linking the Electrical Conductivity and Non-Stoichiometry of Thin Film Ce1−xZrxO2−δ by a Resonant Nanobalance Approachcitations
- 2021Linking the electrical conductivity and non-stoichiometry of thin film Ce1−xZrxO2−δ by a resonant nanobalance approachcitations
- 2020High-temperature stable piezoelectric transducers using epitaxially grown electrodescitations
- 2020Determination of the Dielectric Properties of Storage Materials for Exhaust Gas Aftertreatment Using the Microwave Cavity Perturbation Methodcitations
- 2019Carbon pair defects in aluminum nitridecitations
- 2019Electromechanical losses in carbon- and oxygen-containing bulk AlN single crystals
- 2018Oxygen transport in epitaxial SrTiO3/SrTi1 − xFexO3 multilayer stackscitations
- 2018Thin-film nano-thermogravimetry applied to praseodymium-cerium oxide films at high temperaturescitations
- 2017Oxygen transport in epitaxial SrTiO3/SrTi1xFexO3 multilayer stackscitations
- 2017Oxygen transport in epitaxial SrTiO3/SrTi1 − xFexO3 multilayer stackscitations
- 2017Oxygen transport in epitaxial SrTiO3/SrTi1-xFexO3 multilayer stackscitations
- 2016Preparation and characterization of c-LiMn2O4 thin films prepared by pulsed laser deposition for lithium-ion batteriescitations
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article
Acoustic Loss in LiNb1−xTaxO3 at Temperatures up to 900 °C
Abstract
<jats:p>Lithium niobate‐lithium tantalate solid solutions are new piezoelectric crystals that enable to combine the advantages of their edge compounds with respect to the high thermal stability of lithium tantalate and the high Curie temperature of lithium niobate. This study aims to determine of the acoustic losses of bulk resonators with varying Nb/Ta ratios and their correlation with charge transport at temperatures up to 900 °C and at reduced oxygen partial pressures. Techniques such as resonant piezoelectric spectroscopy and contactless resonant ringdown spectroscopy are used to determine the acoustic losses. Further, the electrical conductivity is determined by impedance spectroscopy. A one‐dimensional physical model for vibrating plates is fitted to the data to extract key parameters such as piezoelectric coefficients and elastic modulus as a function of temperature. Noncontacting determination of loss excludes the impact of metal electrodes and reveals up to 300 °C values in the order of Akhiezer‐type losses. Resonators operated at 2 MHz show a rapid loss increase above about 450 °C, which is attributed to the piezoelectric/carrier relaxation. The latter follows from atomistic models using the key parameters mentioned and the electrical conductivity. The modeling includes variation of the resonance frequency and suggests higher resonance frequencies to lower the acoustic loss.</jats:p>