TY - JOUR
T1 - Structural characteristics and microwave dielectric properties of low-firing Ba(Co1-xMgx)2(VO4)2 (x = 0-1) ceramics
AU - Su, Chia Hui
AU - Lin, Feng Cheng
AU - Chu, Tsung Min
AU - Huang, Cheng Liang
N1 - Funding Information:
This work was financially supported by the Ministry of Science and Technology, Taiwan under grant MOST 104-2221-E-006-037 .
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/11/25
Y1 - 2016/11/25
N2 - The effects of the substitution of Mg2+ at Co2+ sites on the structural, optical and microwave dielectric properties of Ba(Co1-xMgx)2(VO4)2 (x = 0-1) ceramics were investigated. All these compositions were prepared by a conventional solid-state reaction method and observed to crystallize in a tetragonal structure, as confirmed by the XRD diffraction patterns. The unit cell volume decreased with the addition of Mg, due to the smaller ionic radius of Mg2+ than Co2+. The relationships between the polarizability, packing fraction, and bond valence with the microwave dielectric properties are also discussed. The specimen Ba(Co0.2Mg0.8)2(VO4)2 ceramic sintered at 870 °C for 4 h has a dielectric constant (ϵr) of ∼12.28, a Q × f of ∼88,700 GHz (f = 11.469 GHz), and a τf ∼ - 40.6 ppm/°C, and thus is a suitable candidate for use in microwave applications.
AB - The effects of the substitution of Mg2+ at Co2+ sites on the structural, optical and microwave dielectric properties of Ba(Co1-xMgx)2(VO4)2 (x = 0-1) ceramics were investigated. All these compositions were prepared by a conventional solid-state reaction method and observed to crystallize in a tetragonal structure, as confirmed by the XRD diffraction patterns. The unit cell volume decreased with the addition of Mg, due to the smaller ionic radius of Mg2+ than Co2+. The relationships between the polarizability, packing fraction, and bond valence with the microwave dielectric properties are also discussed. The specimen Ba(Co0.2Mg0.8)2(VO4)2 ceramic sintered at 870 °C for 4 h has a dielectric constant (ϵr) of ∼12.28, a Q × f of ∼88,700 GHz (f = 11.469 GHz), and a τf ∼ - 40.6 ppm/°C, and thus is a suitable candidate for use in microwave applications.
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U2 - 10.1016/j.jallcom.2016.06.062
DO - 10.1016/j.jallcom.2016.06.062
M3 - Article
AN - SCOPUS:84974845929
SN - 0925-8388
VL - 686
SP - 608
EP - 615
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -