Dielectric Properties of Ba(Ti_0.9Zr_0.1)O₃Ceramics Co-Doped with Bi and Cu

Abstract

Ba 0.98 Bi 0.02 (Ti 0.9 Zr 0.1 ) 1−x Cu x O 3 (x = 0, 0.01, 0.02, 0.03 mol) ceramics were prepared by a solid state processing. X-ray diffraction analysis indicates that all of the ceramics samples have tetragonal crystal structure. The dielectric constants as a function of temperature at different frequencies show that all of the ceramics have relaxor behavior. But the dielectric dispersion is weak for x = 0.01 and strong for x = 0 and 0.03. The relaxor characteristics were discussed using random field model and Lorenz formula in BBTZC ceramics.

Broadband Dielectric, Terahertz, and Infrared Spectroscopy of BaTiO3–BaZrO3 Solid Solution: From Proper Ferroelectric over Diffuse and Relaxor Ferroelectrics and Dipolar Glass to Normal Dielectric

“…[ 15 ] However, more recently several new aspects on the physics of BZT and understanding of its dielectric properties appeared in the literature, which we would like to briefly review and discuss here. It concerns its high‐frequency dielectric properties including MW, THz, and IR properties [ 7,16–18 ] and their first‐principles and molecular dynamics analysis, [ 19–29 ] nonlinear dielectric properties, [ 30 ] comparison with lead‐containing relaxors, [ 31,32 ] and dipolar glasses, [ 33–35 ] more detailed analysis of the close‐to‐BT compositions (0 ≤ x ≤ 0.2), [ 36–50 ] of pure BZ, [ 6,51 ] variously doped BZT, more suitable for potential applications, [ 26,52–57 ] processing and properties of nanograin BZT ceramics, [ 58–62 ] BT–BZ superlattices [ 63,64 ] and new applications of BZT as giant electrocaloric materials [ 65–67 ] and, in the thin‐film form, as energy storage materials. [ 68 ]…”

“…[15] However, more recently several new aspects on the physics of BZT and understanding of its dielectric properties appeared in the literature, which we would like to briefly review and discuss here. It concerns its highfrequency dielectric properties including MW, THz, and IR properties [7,[16][17][18] and their first-principles and molecular dynamics analysis, [19][20][21][22][23][24][25][26][27][28][29] nonlinear dielectric properties, [30] comparison with lead-containing relaxors, [31,32] and dipolar glasses, [33][34][35] more detailed analysis of the close-to-BT compositions (0 ≤ x ≤ 0.2), [36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] of pure BZ, [6,51] variously doped BZT, more suitable for potential applications, [26,[52][53][54][55][56][57] processing and prop...…”