Structural and electrical properties of SrTiO3-modified Bi-0.5(Na,K)(0.5)TiO3 lead-free ceramics
Küçük Resim Yok
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SPRINGER
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Polycrystalline (1 - x)[0.8Bi(0.5)Na(0.5)TiO(3)-0.2Bi(0.5)K(0.5)TiO(3)]-(x)[SrTiO3] (x = 0 to 0.20) lead-free piezoelectric ceramics were synthesized via a solid-state reaction route. Microstructural and compositional analyses have been carried out using X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD patterns indicated that undoped composition (x = 0) had a tetragonal phase dominant structure, however SrTiO3 (ST) incorporations resulted in a phase shift to rhombohedral symmetry. SEM studies showed that increasing ST doping led to a decrease in grain size. Effect of ST doping on the piezoelectric and dielectric properties were also investigated. The results revealed that the dielectric constant increased gradually with the increase of ST. The ceramic having 12 mol% ST possessed the optimum properties (d(33) = 205 pC/N, k(p) = 0.36, K-T = 1520, tan delta = 6.1 %, Q(m) = 87, T-m = 285 A degrees C) enabling this composition a suitable lead-free candidate for piezoelectric actuator applications.
Açıklama
Anahtar Kelimeler
Kaynak
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
27
Sayı
8
