| Title: | Microstructural engineering of sodium potassium niobate for enhanced and temperature-stable electromechanical response |
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| Authors: | ID Bradeško, Andraž, Institut "Jožef Stefan" (Author)
ID Roknić, Janina, Institut "Jožef Stefan" (Author)
ID Suban, Nejc, Institut "Jožef Stefan" (Author)
ID Žiberna, Katarina, Institut "Jožef Stefan" (Author)
ID Drnovšek, Silvo, Institut "Jožef Stefan" (Author)
ID Kmet, Brigita, Institut "Jožef Stefan" (Author)
ID Shah, Aadil Abass, Institut "Jožef Stefan" (Author)
ID Robić, Marko, Institut "Jožef Stefan" (Author)
ID Uršič Nemevšek, Hana, Institut "Jožef Stefan" (Author)
ID Rojac, Tadej, Institut "Jožef Stefan" (Author)
ID Benčan, Andreja, Institut "Jožef Stefan" (Author)
ID Malič, Barbara, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://ceramics.onlinelibrary.wiley.com/journal/17447402
 PDF - Presentation file, download (5,56 MB)
MD5: 606997C8ABF6BB7406C267E9C31BCC69
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | The development of high-performance lead-free piezoelectrics is a critical step toward sustainable electronic components, yet matching the electromechanical stability over external variables, such as temperature, of lead-based standards remains a significant challenge. This study investigates the synergistic effects of Ti-doping and K5.4Cu1.3Ta10O29 (KCT) co-modification on the structural and functional properties of (K0.5Na0.5)NbO3 (KNN) ceramics. Co-modification significantly enhances both electromechanical coupling and the mechanical quality factor, parameters essential for ultrasonic transducer applications. A comparative analysis of the ferroelectric behavior reveals that these modifications establish a stable internal bias field leading to the hardening of piezoelectric properties. Interestingly, the samples modified solely by Ti exhibit a stronger internal bias field than the Cu-containing co-modified samples, a phenomenon further explored through domain imaging. When benchmarked against commercial hard PZT, the optimized KNN-Ti-KCT ceramic demonstrates comparable thermal stability in the room-temperature to 100°C range. Although a trade-off exists between peak piezoelectric coefficients and environmental impact, these results highlight the potential of tailored KNN ceramics as reliable lead-free alternatives for high-temperature electromechanical devices. |
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| Keywords: | electronic ceramics, piezoelectricity, electromechanical stability |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 27.03.2026 |
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| Article acceptance date: | 30.04.2026 |
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| Publication date: | 20.05.2026 |
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| Publisher: | Wiley |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-12 |
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| Numbering: | Vol. 23, iss. 3, [article no.] e70201 |
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| Source: | Združeno kraljestvo |
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| PID: | 20.500.12556/DiRROS-29552  |
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| UDC: | 621.7+621.9 |
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| ISSN on article: | 1744-7402 |
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| DOI: | 10.1111/ijac.70201 |
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| COBISS.SI-ID: | 279220483 |
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| Copyright: | © 2026 The Author(s). |
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| Note: | Nasl. z nasl. zaslona;
Soavtorji: Janina Roknić, Nejc Suban, Katarina Žiberna, Silvo Drnovšek, Brigita Kmet, Aadil Abass Shah, Marko Robić, Hana Uršič, Tadej Rojac, Andreja Benčan Golob, Barbara Malič;
Opis vira z dne 25. 5. 2026;
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| Publication date in DiRROS: | 25.05.2026 |
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| Views: | 36 |
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| Downloads: | 17 |
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