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Erschienen in:
23.10.2017
Microstructure, phase structure, and electrical properties of Zr-modified BaTiO3-based lead-free ceramics
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 2/2018
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Abstract
Lead-free piezoelectric ceramics of (Ba0.98Ca0.02)(Ti0.94Sn0.06−x
Zr
x
)O3 (BCTS0.06−x
Z
x
) were synthesized by the conventional solid-state method. The evolution of their microstructure, phase structure, and electrical properties of BCTS0.06−x
Z
x
ceramics in the composition range of 0 ≤ x ≤ 0.06 was systematically investigated. A dense microstructure is developed, and a coexistence of orthorhombic and tetragonal phases is identified in the ceramics, showing an enhanced electrical properties (e.g., d
33 ~ 545 pC/N, k
p ~ 0.52, ε
r ~ 3135, tan δ ~ 0.008, strain ~ 0.106%, and d
33* ~ 503 pm/V) as well as relatively high Curie temperature (T
C ~ 100 °C) in the composition of x = 0.02. As a result, the addition of Zr content can effectively enhance the piezoelectricity of BaTiO3-based ceramics without sacrificing the T
C sharply, which is a promising candidate for lead-free piezoelectric ceramics.