Effect of sintering temperature on microstructure and electric properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb 0.5Sb0.5)O3with copper oxide sintering aid

Yongjie Zhao; Yuzhen Zhao; Rongxia Huang; Rongzheng Liu; Heping Zhou

doi:10.1111/j.1551-2916.2010.04353.x

Effect of sintering temperature on microstructure and electric properties of 0.95(K_0.5Na_0.5)NbO₃-0.05Li(Nb _0.5Sb_0.5)O₃with copper oxide sintering aid

Yongjie Zhao^*, Yuzhen Zhao^*, Rongxia Huang, Rongzheng Liu, Heping Zhou

^*Corresponding author for this work

Tsinghua University

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

51 Citations (Scopus)

Abstract

The 0.95(K_0.5Na_0.5NbO₃)-0.05Li(Nb _0.5Sb_0.5)O₃ doped with 0.8 mol% copper oxide (CuO) lead-free piezoelectric ceramics were synthesized by conventional solid-state reaction route. The introduction of CuO could significantly improve the sinterability of 0.95(K_0.5Na_0.5NbO₃)-0. 05Li(Nb_0.5Sb_0.5)O₃ ceramics. The grain size of the specimen was considerably decreased due to the formation of a large amount of liquid phase when the sintering temperature exceeded 960°C. The piezoelectric constant (d₃₃), planar electromechanical coupling (k_p), and dielectric constant () values increased with increasing relative density and grain size. The improved piezoelectric and dielectric properties of d₃₃=207 pC/N, k_p=44%, tan θ=0.0137, Q_m=320, and =340 can be obtained for specimens sintered at 960°C for 2 h.

Original language	English
Pages (from-to)	656-659
Number of pages	4
Journal	Journal of the American Ceramic Society
Volume	94
Issue number	3
DOIs	https://doi.org/10.1111/j.1551-2916.2010.04353.x
Publication status	Published - Mar 2011
Externally published	Yes

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title = "Effect of sintering temperature on microstructure and electric properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb 0.5Sb0.5)O3with copper oxide sintering aid",

abstract = "The 0.95(K0.5Na0.5NbO3)-0.05Li(Nb 0.5Sb0.5)O3 doped with 0.8 mol% copper oxide (CuO) lead-free piezoelectric ceramics were synthesized by conventional solid-state reaction route. The introduction of CuO could significantly improve the sinterability of 0.95(K0.5Na0.5NbO3)-0. 05Li(Nb0.5Sb0.5)O3 ceramics. The grain size of the specimen was considerably decreased due to the formation of a large amount of liquid phase when the sintering temperature exceeded 960°C. The piezoelectric constant (d33), planar electromechanical coupling (kp), and dielectric constant () values increased with increasing relative density and grain size. The improved piezoelectric and dielectric properties of d33=207 pC/N, kp=44%, tan θ=0.0137, Qm=320, and =340 can be obtained for specimens sintered at 960°C for 2 h.",

author = "Yongjie Zhao and Yuzhen Zhao and Rongxia Huang and Rongzheng Liu and Heping Zhou",

year = "2011",

month = mar,

doi = "10.1111/j.1551-2916.2010.04353.x",

language = "English",

volume = "94",

pages = "656--659",

journal = "Journal of the American Ceramic Society",

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T1 - Effect of sintering temperature on microstructure and electric properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Nb 0.5Sb0.5)O3with copper oxide sintering aid

AU - Zhao, Yongjie

AU - Zhao, Yuzhen

AU - Huang, Rongxia

AU - Liu, Rongzheng

AU - Zhou, Heping

PY - 2011/3

Y1 - 2011/3

N2 - The 0.95(K0.5Na0.5NbO3)-0.05Li(Nb 0.5Sb0.5)O3 doped with 0.8 mol% copper oxide (CuO) lead-free piezoelectric ceramics were synthesized by conventional solid-state reaction route. The introduction of CuO could significantly improve the sinterability of 0.95(K0.5Na0.5NbO3)-0. 05Li(Nb0.5Sb0.5)O3 ceramics. The grain size of the specimen was considerably decreased due to the formation of a large amount of liquid phase when the sintering temperature exceeded 960°C. The piezoelectric constant (d33), planar electromechanical coupling (kp), and dielectric constant () values increased with increasing relative density and grain size. The improved piezoelectric and dielectric properties of d33=207 pC/N, kp=44%, tan θ=0.0137, Qm=320, and =340 can be obtained for specimens sintered at 960°C for 2 h.

AB - The 0.95(K0.5Na0.5NbO3)-0.05Li(Nb 0.5Sb0.5)O3 doped with 0.8 mol% copper oxide (CuO) lead-free piezoelectric ceramics were synthesized by conventional solid-state reaction route. The introduction of CuO could significantly improve the sinterability of 0.95(K0.5Na0.5NbO3)-0. 05Li(Nb0.5Sb0.5)O3 ceramics. The grain size of the specimen was considerably decreased due to the formation of a large amount of liquid phase when the sintering temperature exceeded 960°C. The piezoelectric constant (d33), planar electromechanical coupling (kp), and dielectric constant () values increased with increasing relative density and grain size. The improved piezoelectric and dielectric properties of d33=207 pC/N, kp=44%, tan θ=0.0137, Qm=320, and =340 can be obtained for specimens sintered at 960°C for 2 h.

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

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ER -

Effect of sintering temperature on microstructure and electric properties of 0.95(K_0.5Na_0.5)NbO₃-0.05Li(Nb _0.5Sb_0.5)O₃with copper oxide sintering aid

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