A study of relaxation effects in (1-x)BaZr0.2Ti0.8O3-xBa(0.7)Ca(0.3)TiO(3) (x=0.3, 0.35, 0.4) ferroelectric ceramics

作者：Jan Shah Qasim; Usman Muhammad^*; Naveed Ul Haq M; Mumtaz Arif

来源：Journal of Alloys and Compounds, 2018, 735: 1893-1900.

DOI：10.1016/j.jallcom.2017.11.275

• Ceramics
• Ferroelectrics
• Dielectric response
• Relaxation effects
• X-ray diffraction
• Scanning electron microscopy

Lead free (1-x)Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 (x = 0.3, 0.35, 0.4) ceramics were prepared via conventional two-step solid-state reaction technique. Temperature dependent dielectric measurements, conducted in the frequency range from 1 kHz to 1 MHz, indicate diffused phase transition for all the samples. The diffuseness of the transition has been studied by fitting the data with modified Curie-Weiss law. It is found that the composition with x = 0.3 behaves as a weak relaxor-ferroelectric, superposed by a non-relaxor behavior. Vogel-Fulcher law was used to characterize the relaxor-ferroelectric behavior while the analysis according to the Cole-Cole plots was used to characterize the non-relaxor features.

• 出版日期2018-2-25