Sintering behavior of lead-free (K,Na)NbO3-basedpiezoelectric ceramics

Cheol Woo Ahn; Chee Sung Park; Chang Hak Choi; Sahn Nahm; Myong Jae Yoo; Hyeung Gyu Lee; Shashank Priya

doi:10.1111/j.1551-2916.2009.03167.x

Sintering behavior of lead-free (K,Na)NbO₃-basedpiezoelectric ceramics

Cheol Woo Ahn, Chee Sung Park, Chang Hak Choi, Sahn Nahm, Myong Jae Yoo, Hyeung Gyu Lee, Shashank Priya

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Abstract

In this manuscript, we investigate the sintering behavior of (K,Na)NbO ₃ (KNN)-based ceramics covering unmodified KNN, (K,Na,Li)NbO ₃ (KNLN), and KNLN-xBaTiO₃ (KNLN-BT) systems. Three stages of sintering were identified using detailed temperature and time dependent microscopy. The first stage corresponds to rearrangement of random shape particle to form stack of plate type particles. The second stage is characterized by rapid grain growth promoted by formation of liquid phase. The liquid phase was identified to be Na-deficient composition. In the final stage of sintering, densification slows and microstructural coarsening becomes the dominant process. The fraction control of liquid phase was an important factor to obtain dense and uniform microstructure by completely filling the voids between the plate-shaped particle stacks.

Original language	English (US)
Pages (from-to)	2033-2038
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	92
Issue number	9
DOIs	https://doi.org/10.1111/j.1551-2916.2009.03167.x
State	Published - Sep 2009
Externally published	Yes

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10.1111/j.1551-2916.2009.03167.x

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title = "Sintering behavior of lead-free (K,Na)NbO3-basedpiezoelectric ceramics",

abstract = "In this manuscript, we investigate the sintering behavior of (K,Na)NbO 3 (KNN)-based ceramics covering unmodified KNN, (K,Na,Li)NbO 3 (KNLN), and KNLN-xBaTiO3 (KNLN-BT) systems. Three stages of sintering were identified using detailed temperature and time dependent microscopy. The first stage corresponds to rearrangement of random shape particle to form stack of plate type particles. The second stage is characterized by rapid grain growth promoted by formation of liquid phase. The liquid phase was identified to be Na-deficient composition. In the final stage of sintering, densification slows and microstructural coarsening becomes the dominant process. The fraction control of liquid phase was an important factor to obtain dense and uniform microstructure by completely filling the voids between the plate-shaped particle stacks.",

author = "Ahn, {Cheol Woo} and Park, {Chee Sung} and Choi, {Chang Hak} and Sahn Nahm and Yoo, {Myong Jae} and Lee, {Hyeung Gyu} and Shashank Priya",

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AU - Ahn, Cheol Woo

AU - Park, Chee Sung

AU - Choi, Chang Hak

AU - Nahm, Sahn

AU - Yoo, Myong Jae

AU - Lee, Hyeung Gyu

AU - Priya, Shashank

PY - 2009/9

Y1 - 2009/9

N2 - In this manuscript, we investigate the sintering behavior of (K,Na)NbO 3 (KNN)-based ceramics covering unmodified KNN, (K,Na,Li)NbO 3 (KNLN), and KNLN-xBaTiO3 (KNLN-BT) systems. Three stages of sintering were identified using detailed temperature and time dependent microscopy. The first stage corresponds to rearrangement of random shape particle to form stack of plate type particles. The second stage is characterized by rapid grain growth promoted by formation of liquid phase. The liquid phase was identified to be Na-deficient composition. In the final stage of sintering, densification slows and microstructural coarsening becomes the dominant process. The fraction control of liquid phase was an important factor to obtain dense and uniform microstructure by completely filling the voids between the plate-shaped particle stacks.

AB - In this manuscript, we investigate the sintering behavior of (K,Na)NbO 3 (KNN)-based ceramics covering unmodified KNN, (K,Na,Li)NbO 3 (KNLN), and KNLN-xBaTiO3 (KNLN-BT) systems. Three stages of sintering were identified using detailed temperature and time dependent microscopy. The first stage corresponds to rearrangement of random shape particle to form stack of plate type particles. The second stage is characterized by rapid grain growth promoted by formation of liquid phase. The liquid phase was identified to be Na-deficient composition. In the final stage of sintering, densification slows and microstructural coarsening becomes the dominant process. The fraction control of liquid phase was an important factor to obtain dense and uniform microstructure by completely filling the voids between the plate-shaped particle stacks.

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Sintering behavior of lead-free (K,Na)NbO₃-basedpiezoelectric ceramics

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