Microstructure and piezoelectric properties of (Na0.5K 0.5)NbO3 lead-free piezoelectric ceramics with V 2O5 addition

In Tae Seo; Hwi Yeol Park; Nguyen Van Dung; Min Kyu Choi; Sahn Nahm; Hyeung Gyu Lee; Byung Hyun Choi

doi:10.1109/TUFFC.2009.1321

Microstructure and piezoelectric properties of (Na_0.5K _0.5)NbO₃ lead-free piezoelectric ceramics with V ₂O₅ addition

In Tae Seo, Hwi Yeol Park, Nguyen Van Dung, Min Kyu Choi, Sahn Nahm, Hyeung Gyu Lee, Byung Hyun Choi

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

20 Citations (Scopus)

Abstract

Various amounts of Nb₂O₅ in the (Na _0.5K_0.5) NbO₃ (NKN) ceramic were replaced by V₂O₅ to decrease its sintering temperature to below 950°C. A small V₂O₅ content resulted in a dense microstructure with an increased grain size for the specimen sintered at 900°C due to the presence of a liquid phase. When V₂O₅ was added to the NKN ceramics, their orthorhombic-to-tetragonal transition temperature increased from 178°C to around 200°C. However, their Curie temperature decreased from 402°C to around 330°C. The κ_p, ε3^T/ε0, and Q_m values increased with V₂O₅ addition, probably due to the increased density and poling state, which was identified by the phase angle. The specimen with x = 0.05, sintered at 900°C for 8 h, exhibited the following piezoelectric properties: κ_p = 0.32, ε3 ^T/ε0 = 245, d₃₃ = 120 (pC/N), and Q_m = 232.

Original language	English
Article number	5306715
Pages (from-to)	2337-2342
Number of pages	6
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	56
Issue number	11
DOIs	https://doi.org/10.1109/TUFFC.2009.1321
Publication status	Published - 2009

Bibliographical note

Funding Information:
manuscript received september 12, 2008; accepted august 10, 2009. This research was supported by a grant from the center for advanced materials Processing (camP) of the 21st century Frontier r&d Program, which was funded by the ministry of commerce, Industry and Energy (mocIE), republic of Korea.

ASJC Scopus subject areas

Instrumentation
Acoustics and Ultrasonics
Electrical and Electronic Engineering

Access to Document

10.1109/TUFFC.2009.1321

Cite this

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title = "Microstructure and piezoelectric properties of (Na0.5K 0.5)NbO3 lead-free piezoelectric ceramics with V 2O5 addition",

abstract = "Various amounts of Nb2O5 in the (Na 0.5K0.5) NbO3 (NKN) ceramic were replaced by V2O5 to decrease its sintering temperature to below 950°C. A small V2O5 content resulted in a dense microstructure with an increased grain size for the specimen sintered at 900°C due to the presence of a liquid phase. When V2O5 was added to the NKN ceramics, their orthorhombic-to-tetragonal transition temperature increased from 178°C to around 200°C. However, their Curie temperature decreased from 402°C to around 330°C. The κp, ε3T/ε0, and Qm values increased with V2O5 addition, probably due to the increased density and poling state, which was identified by the phase angle. The specimen with x = 0.05, sintered at 900°C for 8 h, exhibited the following piezoelectric properties: κp = 0.32, ε3 T/ε0 = 245, d33 = 120 (pC/N), and Qm = 232.",

author = "Seo, {In Tae} and Park, {Hwi Yeol} and {Van Dung}, Nguyen and Choi, {Min Kyu} and Sahn Nahm and Lee, {Hyeung Gyu} and Choi, {Byung Hyun}",

note = "Funding Information: manuscript received september 12, 2008; accepted august 10, 2009. This research was supported by a grant from the center for advanced materials Processing (camP) of the 21st century Frontier r&d Program, which was funded by the ministry of commerce, Industry and Energy (mocIE), republic of Korea.",

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AU - Van Dung, Nguyen

AU - Choi, Min Kyu

AU - Nahm, Sahn

AU - Lee, Hyeung Gyu

AU - Choi, Byung Hyun

N1 - Funding Information: manuscript received september 12, 2008; accepted august 10, 2009. This research was supported by a grant from the center for advanced materials Processing (camP) of the 21st century Frontier r&d Program, which was funded by the ministry of commerce, Industry and Energy (mocIE), republic of Korea.

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