Enhanced Temperature Stability of Pyroelectric Sensing in Multilayer Potassium Sodium Niobate‐Based Ceramics with Graded Polarization Rotation
Pyroelectric effect which refers to electrical responses induced by time temperature‐dependent fluctuations has received extensive attention, showing promising application prospects for infrared (IR) technology. Although enhanced pyroelectric performances are obtained in potassium sodium niobate‐bas...
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Veröffentlicht in: | Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-10, Vol.20 (43), p.e2403346-n/a |
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Sprache: | eng |
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Zusammenfassung: | Pyroelectric effect which refers to electrical responses induced by time temperature‐dependent fluctuations has received extensive attention, showing promising application prospects for infrared (IR) technology. Although enhanced pyroelectric performances are obtained in potassium sodium niobate‐based ceramics at room temperature via multi‐symmetries coexistence design, the poor pyroelectric temperature stability is still an urging desire that needs to be resolved. Herin, by constructing multilayer composite ceramics and adjusting the proportion of stacked layers, improved pyroelectric coefficient, and figures of merit (FOMs), as well as enhanced temperature stabilities can be achieved. With a remained high pyroelectric coefficient of 5.45 × 10−4 C m−2°C−1 at room temperature, the pyroelectric parameters almost keep unchanged in the temperature range of 30–100 °C, showing great properties advantages compared with previous reports. The excellent properties can be attributed to the graded polarization rotation states among each lamination induced by successive phase transitions. The novel strategy for achieving stable pyroelectric sensing can further promote the application in the IR sensors field.
Excellent pyroelectric and FOMs temperature stability is achieved by designing multilayer potassium sodium niobate ‐based ceramics, which is superior to other pyroelectric ceramic systems. The excellent temperature stability can be attributed to the graded polarization rotation states among each lamination induced by successive phase transitions. |
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ISSN: | 1613-6810 1613-6829 1613-6829 |
DOI: | 10.1002/smll.202403346 |