TY - JOUR
T1 - Crystal structure and microwave dielectric properties of an ultralow-temperature-fired (AgBi)0.5WO4 ceramic
AU - Zhou, Di
AU - Pang, Li Xia
AU - Xie, Hui Dong
AU - Guo, Jing
AU - He, Bin
AU - Qi, Ze Ming
AU - Shao, Tao
AU - Yao, Xi
AU - Randall, Clive A.
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2014/1
Y1 - 2014/1
N2 - A new microwave dielectric (AgBi)0.5WO4 ceramic with an ultralow firing temperature was prepared by the solid-state reaction method. (AgBi)0.5WO4 can be obtained as a dense single-phase bulk material with a calcination temperature of 500 °C and sintering temperatures of ca. 580 °C. The material has a microwave relative permittivity of ca. 35.9, a Qf value of ca. 13000 GHz, and a negative temperature coefficient of -69 ppm/°C at 7.5 GHz. The crystal structure of (AgBi)0.5WO 4 was determined by a combination of X-ray and transmission electron microscopy (TEM) diffraction analysis. The compound crystallizes in the monoclinic C12/m1 (no. 12) space group with the lattice parameters a = 10.1330(8) Å, b = 11.0013(0) Å, c = 7.2756(4) Å, and β = 127.712(3)°. From an X-ray diffraction analysis, the (Ag 0.5Bi0.5)WO4 ceramic reacts with silver after heat treatment at 560 °C to form new compounds, namely, Bi 2WO6 and Ag2WO4. However, the (AgBi)0.5WO4 ceramic is chemically compatible with aluminum powder at 600 °C as an alternative cofired electrode material. All the results suggest that (AgBi)0.5WO4 ceramic is a promising new candidate material for ultralow-temperature cofired ceramic (ULTCC) technology. (AgBi)0.5WO4 can be obtained as a dense single-phase bulk material with sintering temperatures of ca. 580 °C. The material has a microwave relative permittivity of ca. 35.9, a Qf value of ca. 13000 GHz, and a negative temperature coefficient of -69 ppm/°C at 7.5 GHz. It is chemically compatible with aluminum powder at 600 °C as an alternative cofired electrode material.
AB - A new microwave dielectric (AgBi)0.5WO4 ceramic with an ultralow firing temperature was prepared by the solid-state reaction method. (AgBi)0.5WO4 can be obtained as a dense single-phase bulk material with a calcination temperature of 500 °C and sintering temperatures of ca. 580 °C. The material has a microwave relative permittivity of ca. 35.9, a Qf value of ca. 13000 GHz, and a negative temperature coefficient of -69 ppm/°C at 7.5 GHz. The crystal structure of (AgBi)0.5WO 4 was determined by a combination of X-ray and transmission electron microscopy (TEM) diffraction analysis. The compound crystallizes in the monoclinic C12/m1 (no. 12) space group with the lattice parameters a = 10.1330(8) Å, b = 11.0013(0) Å, c = 7.2756(4) Å, and β = 127.712(3)°. From an X-ray diffraction analysis, the (Ag 0.5Bi0.5)WO4 ceramic reacts with silver after heat treatment at 560 °C to form new compounds, namely, Bi 2WO6 and Ag2WO4. However, the (AgBi)0.5WO4 ceramic is chemically compatible with aluminum powder at 600 °C as an alternative cofired electrode material. All the results suggest that (AgBi)0.5WO4 ceramic is a promising new candidate material for ultralow-temperature cofired ceramic (ULTCC) technology. (AgBi)0.5WO4 can be obtained as a dense single-phase bulk material with sintering temperatures of ca. 580 °C. The material has a microwave relative permittivity of ca. 35.9, a Qf value of ca. 13000 GHz, and a negative temperature coefficient of -69 ppm/°C at 7.5 GHz. It is chemically compatible with aluminum powder at 600 °C as an alternative cofired electrode material.
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U2 - 10.1002/ejic.201300789
DO - 10.1002/ejic.201300789
M3 - Article
AN - SCOPUS:84892164032
SN - 1434-1948
SP - 296
EP - 301
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 2
ER -