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Title: Bi(Zn2/3Nb1/3)O3-(K0.5Na0.5)NbO3 high-temperature lead-freeferroelectric ceramics with low capacitance variation in a broad temperature usage range
Authors: Cheng, Hualei
Zhou, Wancheng
Zhu, Dongmei
Luo, Fa
Xu, Boxi
Du, Hongliang.
Keywords: DRNTU::Engineering::Materials::Ceramic materials
Issue Date: 2012
Source: Cheng, H., Du, H., Zhou, W., Zhu, D., Luo, F., & Xu, B. (2013). Bi(Zn 2/3 Nb 1/3 )O 3 -(K 0.5 Na 0.5 )NbO 3 High-Temperature Lead-FreeFerroelectric Ceramics with Low Capacitance Variation in a Broad Temperature Usage Range. Journal of the American Ceramic Society, 96(3), 833-837.
Series/Report no.: Journal of the American ceramic society
Abstract: The xBi(Zn2/3Nb1/3)O3–(1−x)(K0.5Na0.5)NbO3 (abbreviated as xBZN–(1−x)KNN) ceramics have been synthesized using the conventional solid-state sintering method. The phase structure, dielectric properties and “relaxorlike” behavior of the ceramics were investigated. The 0.03BZN–0.97KNN ceramics show a broad and stable permittivity maximum near 2000 and lower dielectric loss (≤5%) at a broad temperature usage range (100°C–400°C) and the capacitance variation (ΔC/C150°C) is maintained smaller than ±15%. The 0.03BZN–0.97KNN ceramics only possess the diffuse phase transition and no frequency dispersion of dielectric permittivity, which indicates that 0.03BZN–0.97KNN ceramics is a high temperature “relaxorlike” ferroelectric ceramics. These results indicate that 0.03BZN–0.97KNN ceramics are excellent promising candidates for preparing high-temperature multilayer ceramics capacitors.
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