Enhanced dielectric properties of Ba(Ti, Sn)O3 lead-free ceramics by Bi(Zn0.5Ti0.5)O3 substitution. Issue 187 (12th February 2018)

• Record Type: Journal Article
• Authors: Bomlai, Pornsuda; Hwangkaw, Panida
• Is Part Of: Integrated ferroelectrics. Issue 187(2018)
• Page Start: 165
• Page End: 172
• Publication Date: 2018-02-12
• Subjects: Lead-free materials -- substitution -- dielectric constant; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2018.1445336
• Languages: English
• ISSNs: 1058-4587

Abstract

ABSTRACT: The (1- x )Ba(Ti, Sn)O3 - x Bi(Zn0.5 Ti0.5 )O3 lead-free ceramics with x = 0, 0.025, 0.05, 0.075 and 0.1 were prepared by the reaction sintering method. The effects of Bi(Zn0.5 Ti0.5 )O3 substitution on the densification, phase structure, microstructure and electrical properties of Ba(Ti, Sn)O3 ceramics were investigated. The results showed that the highest density of 6.22 ± 0.04 g/cm 3 was achieved in x = 0.1 composition. The crystal structure was found to change from tetragonal in x = 0 composition to cubic at x ≥ 0.025. The room-temperature dielectric constant reaching to 39, 560 (1 kHz) with low dielectric loss was achieved in ceramic with x = 0.025. The grain size and Curie temperature were significantly decreased when Bi(Zn0.5 Ti0.5 )O3 content increased. The AC complex impedance spectroscopy technique was also used to obtain the electrical parameters of (1- x )Ba(Ti, Sn)O3 - x Bi(Zn0.5 Ti0.5 )O3 ceramics. As a result, adding Bi(Zn0.5 Ti0.5 )O3 is an effective way to enhance the densification and dielectric properties of Ba(Ti, Sn)O3 ceramics.