Revisiting the role of NbO precursors on solid-state formation reactions of (K $_{0.5}$ Na $_{0.5}$ )NbO

Shoji, Takuma*; Nam, H.*; Ye, J.*; Ito, Daiki*; Takagi, Yuka*; Yoneda, Yasuhiro ; Nagata, Hajime*

(K,Na)NbO (KNN)-based ceramics have been hesitant to be used in practical piezoelectric devices due to their poor chemical homogeneity, despite their excellent piezoelectric characteristics. In this study, we revealed that the role of NbO precursors varies depending on the processing approaches and is strongly correlated with the chemical homogeneity of KNN with the use of soft X-ray absorption spectroscopy. Therefore, the choice of NbO precursor is a dominant factor in the fabrication of KNN.

Language	:	English
Journal	:	Journal of the American Ceramic Society
Volume	:	109
Number	:	3
Pages	:	p.e70657_1 - e70657_9
Publication Year/Month	:	2026/03
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Paper URL	:	https://doi.org/10.1111/jace.70657
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Keywords	:	no keyword
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : AA20250851
JAEA Abstracts No. : 54000443
Paper Submission No. : 30855

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Revisiting the role of NbO precursors on solid-state formation reactions of (KNa)NbO

Revisiting the role of NbO precursors on solid-state formation reactions of (K $_{0.5}$ Na $_{0.5}$ )NbO