Hardening of K0.5Na0.5NbO3 lead-free ceramics by adding Ag2O and CuO and crystal-orientation behavior of their powders under a high magnetic field

Jun Li; Zhiwei Zhang; Hyo Matsui; Yutaka Doshida; Satoshi Tanaka; Hideki Tamura; Yoshiki Takano; Satoshi Demura

doi:10.35848/1347-4065/adb7ec

Hardening of K_0.5Na_0.5NbO₃ lead-free ceramics by adding Ag₂O and CuO and crystal-orientation behavior of their powders under a high magnetic field

Jun Li, Zhiwei Zhang, Hyo Matsui, Yutaka Doshida, Satoshi Tanaka, Hideki Tamura, Yoshiki Takano, Satoshi Demura

College of Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

The hardening of K_0.5Na_0.5NbO₃ (KNN) ceramics with the addition of Ag₂O and CuO and the crystal-orientation behavior of KNN and CuO-added KNN powders under a high magnetic field were investigated. Ag₂O reduced the degree of compositional deviation of KNN ceramics and increased their density. Additionally, the piezoelectric characteristics were improved by the addition of Ag₂O. CuO functioned as a sintering aid for KNN, and the CuO-added KNN ceramics increased the grain size and mechanical quality factor by up to approximately 1200. The simultaneous addition of Ag₂O (0.01 mol) and CuO (0.01 mol) to KNN resulted in hardening with a mechanical quality factor of 1400 owing to the synergistic contributions of each additive. Under a high magnetic field of 5 T, the KNN powder and CuO (0.01 mol)-added KNN powder exhibited b- and c-axes orientation parallel to the magnetic field, which is expected to enhance the piezoelectric properties through crystal orientation.

Original language	English
Article number	03SP20
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	64
Issue number	3
DOIs	https://doi.org/10.35848/1347-4065/adb7ec
Publication status	Published - 1 Mar 2025

Keywords

KNaNbO-based lead-free
hardening
piezoelectric ceramics

Access to Document

10.35848/1347-4065/adb7ec

Cite this

Li, J., Zhang, Z., Matsui, H., Doshida, Y., Tanaka, S., Tamura, H., Takano, Y., & Demura, S. (2025). Hardening of K_0.5Na_0.5NbO₃ lead-free ceramics by adding Ag₂O and CuO and crystal-orientation behavior of their powders under a high magnetic field. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 64(3), Article 03SP20. https://doi.org/10.35848/1347-4065/adb7ec

@article{b77f8f30afea42e1a9bddbb163e8bcaa,

title = "Hardening of K0.5Na0.5NbO3 lead-free ceramics by adding Ag2O and CuO and crystal-orientation behavior of their powders under a high magnetic field",

abstract = "The hardening of K0.5Na0.5NbO3 (KNN) ceramics with the addition of Ag2O and CuO and the crystal-orientation behavior of KNN and CuO-added KNN powders under a high magnetic field were investigated. Ag2O reduced the degree of compositional deviation of KNN ceramics and increased their density. Additionally, the piezoelectric characteristics were improved by the addition of Ag2O. CuO functioned as a sintering aid for KNN, and the CuO-added KNN ceramics increased the grain size and mechanical quality factor by up to approximately 1200. The simultaneous addition of Ag2O (0.01 mol) and CuO (0.01 mol) to KNN resulted in hardening with a mechanical quality factor of 1400 owing to the synergistic contributions of each additive. Under a high magnetic field of 5 T, the KNN powder and CuO (0.01 mol)-added KNN powder exhibited b- and c-axes orientation parallel to the magnetic field, which is expected to enhance the piezoelectric properties through crystal orientation.",

keywords = "KNaNbO-based lead-free, hardening, piezoelectric ceramics",

author = "Jun Li and Zhiwei Zhang and Hyo Matsui and Yutaka Doshida and Satoshi Tanaka and Hideki Tamura and Yoshiki Takano and Satoshi Demura",

note = "Publisher Copyright: {\textcopyright} 2025 The Japan Society of Applied Physics. All rights, including for text and data mining, AI training, and similar technologies, are reserved.",

year = "2025",

month = mar,

day = "1",

doi = "10.35848/1347-4065/adb7ec",

language = "English",

volume = "64",

journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "3",

}

Li, J, Zhang, Z, Matsui, H, Doshida, Y, Tanaka, S, Tamura, H, Takano, Y & Demura, S 2025, 'Hardening of K_0.5Na_0.5NbO₃ lead-free ceramics by adding Ag₂O and CuO and crystal-orientation behavior of their powders under a high magnetic field', Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, vol. 64, no. 3, 03SP20. https://doi.org/10.35848/1347-4065/adb7ec

Hardening of K_0.5Na_0.5NbO₃ lead-free ceramics by adding Ag₂O and CuO and crystal-orientation behavior of their powders under a high magnetic field. / Li, Jun; Zhang, Zhiwei; Matsui, Hyo et al.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 64, No. 3, 03SP20, 01.03.2025.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Hardening of K0.5Na0.5NbO3 lead-free ceramics by adding Ag2O and CuO and crystal-orientation behavior of their powders under a high magnetic field

AU - Li, Jun

AU - Zhang, Zhiwei

AU - Matsui, Hyo

AU - Doshida, Yutaka

AU - Tanaka, Satoshi

AU - Tamura, Hideki

AU - Takano, Yoshiki

AU - Demura, Satoshi

PY - 2025/3/1

Y1 - 2025/3/1

N2 - The hardening of K0.5Na0.5NbO3 (KNN) ceramics with the addition of Ag2O and CuO and the crystal-orientation behavior of KNN and CuO-added KNN powders under a high magnetic field were investigated. Ag2O reduced the degree of compositional deviation of KNN ceramics and increased their density. Additionally, the piezoelectric characteristics were improved by the addition of Ag2O. CuO functioned as a sintering aid for KNN, and the CuO-added KNN ceramics increased the grain size and mechanical quality factor by up to approximately 1200. The simultaneous addition of Ag2O (0.01 mol) and CuO (0.01 mol) to KNN resulted in hardening with a mechanical quality factor of 1400 owing to the synergistic contributions of each additive. Under a high magnetic field of 5 T, the KNN powder and CuO (0.01 mol)-added KNN powder exhibited b- and c-axes orientation parallel to the magnetic field, which is expected to enhance the piezoelectric properties through crystal orientation.

AB - The hardening of K0.5Na0.5NbO3 (KNN) ceramics with the addition of Ag2O and CuO and the crystal-orientation behavior of KNN and CuO-added KNN powders under a high magnetic field were investigated. Ag2O reduced the degree of compositional deviation of KNN ceramics and increased their density. Additionally, the piezoelectric characteristics were improved by the addition of Ag2O. CuO functioned as a sintering aid for KNN, and the CuO-added KNN ceramics increased the grain size and mechanical quality factor by up to approximately 1200. The simultaneous addition of Ag2O (0.01 mol) and CuO (0.01 mol) to KNN resulted in hardening with a mechanical quality factor of 1400 owing to the synergistic contributions of each additive. Under a high magnetic field of 5 T, the KNN powder and CuO (0.01 mol)-added KNN powder exhibited b- and c-axes orientation parallel to the magnetic field, which is expected to enhance the piezoelectric properties through crystal orientation.

KW - KNaNbO-based lead-free

KW - hardening

KW - piezoelectric ceramics

UR - http://www.scopus.com/inward/record.url?scp=105000064903&partnerID=8YFLogxK

U2 - 10.35848/1347-4065/adb7ec

DO - 10.35848/1347-4065/adb7ec

M3 - Article

AN - SCOPUS:105000064903

SN - 0021-4922

VL - 64

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers

IS - 3

M1 - 03SP20

ER -

Hardening of K_0.5Na_0.5NbO₃ lead-free ceramics by adding Ag₂O and CuO and crystal-orientation behavior of their powders under a high magnetic field

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this