Structural variation and piezoelectric properties of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics

Cheol Woo Ahn; Hwi Yeol Park; Sahn Nahm; Kenji Uchino; Hyeung Gyu Lee; Hwack Joo Lee

doi:10.1016/j.sna.2006.10.036

Structural variation and piezoelectric properties of 0.95(Na_0.5K_0.5)NbO₃-0.05BaTiO₃ ceramics

Cheol Woo Ahn
, Hwi Yeol Park
, Sahn Nahm
, Kenji Uchino
, Hyeung Gyu Lee
, Hwack Joo Lee

Materials Research Institute (MRI)

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

58 Scopus citations

Abstract

A dense microstructure was developed for the 0.95(Na_0.5K_0.5)NbO₃-0.05BaTiO₃ (0.95NKN-0.05BT) ceramics sintered at above 1050 °C. Grain growth was observed in the specimens sintered at 1050-1060 °C while a liquid phase was found in the specimens sintered at above 1050 °C, which explained the increased sinterability and grain size. KTiNbO₅ and Ba₆Ti₂Nb₈O₃₀ second phases were also observed for the specimens sintered at above 1060 °C. Evaporation of Na₂O was responsible for the formation of the liquid phase and the KTiNbO₅ and Ba₆Ti₂Nb₈O₃₀ second phases. Muffling with 0.95NKN-0.05BT powders during the sintering improved the piezoelectric properties, possibly due to the increased poling efficiency resulting from the reduced Na₂O evaporation.

Original language	English (US)
Pages (from-to)	255-260
Number of pages	6
Journal	Sensors and Actuators, A: Physical
Volume	136
Issue number	1
DOIs	https://doi.org/10.1016/j.sna.2006.10.036
State	Published - May 1 2007

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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10.1016/j.sna.2006.10.036

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title = "Structural variation and piezoelectric properties of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics",

abstract = "A dense microstructure was developed for the 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 (0.95NKN-0.05BT) ceramics sintered at above 1050 °C. Grain growth was observed in the specimens sintered at 1050-1060 °C while a liquid phase was found in the specimens sintered at above 1050 °C, which explained the increased sinterability and grain size. KTiNbO5 and Ba6Ti2Nb8O30 second phases were also observed for the specimens sintered at above 1060 °C. Evaporation of Na2O was responsible for the formation of the liquid phase and the KTiNbO5 and Ba6Ti2Nb8O30 second phases. Muffling with 0.95NKN-0.05BT powders during the sintering improved the piezoelectric properties, possibly due to the increased poling efficiency resulting from the reduced Na2O evaporation.",

author = "Ahn, \{Cheol Woo\} and Park, \{Hwi Yeol\} and Sahn Nahm and Kenji Uchino and Lee, \{Hyeung Gyu\} and Lee, \{Hwack Joo\}",

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doi = "10.1016/j.sna.2006.10.036",

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T1 - Structural variation and piezoelectric properties of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics

AU - Ahn, Cheol Woo

AU - Park, Hwi Yeol

AU - Nahm, Sahn

AU - Uchino, Kenji

AU - Lee, Hyeung Gyu

AU - Lee, Hwack Joo

PY - 2007/5/1

Y1 - 2007/5/1

N2 - A dense microstructure was developed for the 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 (0.95NKN-0.05BT) ceramics sintered at above 1050 °C. Grain growth was observed in the specimens sintered at 1050-1060 °C while a liquid phase was found in the specimens sintered at above 1050 °C, which explained the increased sinterability and grain size. KTiNbO5 and Ba6Ti2Nb8O30 second phases were also observed for the specimens sintered at above 1060 °C. Evaporation of Na2O was responsible for the formation of the liquid phase and the KTiNbO5 and Ba6Ti2Nb8O30 second phases. Muffling with 0.95NKN-0.05BT powders during the sintering improved the piezoelectric properties, possibly due to the increased poling efficiency resulting from the reduced Na2O evaporation.

AB - A dense microstructure was developed for the 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 (0.95NKN-0.05BT) ceramics sintered at above 1050 °C. Grain growth was observed in the specimens sintered at 1050-1060 °C while a liquid phase was found in the specimens sintered at above 1050 °C, which explained the increased sinterability and grain size. KTiNbO5 and Ba6Ti2Nb8O30 second phases were also observed for the specimens sintered at above 1060 °C. Evaporation of Na2O was responsible for the formation of the liquid phase and the KTiNbO5 and Ba6Ti2Nb8O30 second phases. Muffling with 0.95NKN-0.05BT powders during the sintering improved the piezoelectric properties, possibly due to the increased poling efficiency resulting from the reduced Na2O evaporation.

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JO - Sensors and Actuators, A: Physical

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IS - 1

ER -

Structural variation and piezoelectric properties of 0.95(Na_0.5K_0.5)NbO₃-0.05BaTiO₃ ceramics

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