Dielectric properties of single crystalline Ba(Ti0.99Zr0.01)2O5 prepared by the floating zone method. (2017)

• Record Type: Journal Article
• Authors: Shiga, Keiji; Katsui, Hirokazu; Goto, Takashi
• Is Part Of: Materials today. Volume 4:Number 11(2017)Part 1
• Page Start: 11457
• Page End: 11460
• Publication Date: 2017
• Subjects: BaTi2O5 -- Ferroelectric material -- Impedance, Floating zone method -- Single crystal; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2017.09.028
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Zr 4+ -substituted single crystalline BaTi2 O5 (Ba(Ti0.99 Zr0.01 )2 O5 ) was prepared by the floating zone method, and its dielectric properties were investigated. The growth direction of Ba(Ti0.99 Zr0.01 )2 O5 was parallel to the b axis. The Curie temperature of Ba(Ti0.99 Zr0.01 )2 O5 was 710 K, which was 42 K lower than that of BaTi2 O5 . The complex impedance plane plot of BaTi2 O5 in the b direction showed a semicircle associated with ferroelectric response and a spike associated with ionic conduction at 623 K. On the other hand, the complex impedance plot of Ba(Ti0.99 Zr0.01 )2 O5 showed a single semicircle, suggesting almost no ionic conduction. The electrical conductivity of Ba(Ti0.99 Zr0.01 )2 O5 was approximately half of that of BaTi2 O5 .