Influence of superlattice and antiphase domain boundaries on dielectric loss in Ba[Mg{sub 1/3}(Nb{sub x/4}Ta{sub (4-x)/4}){sub 2/3}]O{sub 3} ceramics

Journal Article · Mon Sep 05 04:00:00 EDT 2005 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2041831· OSTI ID:20709729

Lin, C -F; Lu, H -H; Chang, T -I; Huang, J -L ^[1]

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1. Department of Materials Science and Engineering, National Cheng-Kung University, Tainan, Taiwan (China)

The Ba[Mg{sub 1/3}(Nb{sub x/4}Ta{sub (4-x)/4}){sub 2/3}]O{sub 3} ceramics (x=0, 1, 2, 3, and 4) synthesized by a solid reaction method were sintered at 1650 deg. C for 9 h. The quality factor (Q,{approx}1/tan {delta},tan {delta}: dielectric loss) and superlattice structure were investigated by the cavity method and high-resolution electron microscopy. The excellent Q value of 17 600 obtained at appropriate Nb content (x=1). The disorder structure (superlattice modulation{approx}0.41 nm), 1:2 ordering structure (superlattice modulation{approx}0.71 nm) and antiphase domain boundary (APB) were revealed in Ba[Mg{sub 1/3}(Nb{sub x/4}Ta{sub (4-x)/4}){sub 2/3}]O{sub 3} ceramics. The formation of extra ordering structure (superlattice modulation{approx}1.24 nm) on the APBs contributed to the improved Q value with the stabilization of ordering-induced domain boundaries.

• OSTI ID: 20709729
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 87; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CERAMICS
DIELECTRIC MATERIALS
MAGNESIUM COMPOUNDS
NIOBIUM COMPOUNDS
Q-VALUE
QUALITY FACTOR
SINTERING
STABILIZATION
SUPERLATTICES
TANTALUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY