TY - JOUR
T1 - Low-loss and ultra-low sintering temperature ceramics of AgCa1−xMg xVO4 (x = 0–0.09) for microwave applications
AU - Li, Yau Shiuan
AU - Ling, I. Chun
AU - Hsu, Tsung Hsien
AU - Huang, Cheng Liang
N1 - Funding Information:
This work was financially sponsored by the National Science and Technology Council of Taiwan under the projects MOST 110-2221-E-006-032-MY2 and MOST 111-2221-E-006-164-MY2. The authors would like to thank Ms. Hui–Jung Shih with the Instrument Center of National Cheng Kung University for supporting the use of high-resolution SEM (Hitachi SU8000). The authors also gratefully acknowledge the use of D8 Discover equipment belonging to the Instrument Center of National Cheng Kung University.
Funding Information:
This work was financially sponsored by the National Science and Technology Council of Taiwan under the projects MOST 110-2221-E-006-032-MY2 and MOST 111-2221-E-006-164-MY2. The authors would like to thank Ms. Hui–Jung Shih with the Instrument Center of National Cheng Kung University for supporting the use of high-resolution SEM (Hitachi SU8000). The authors also gratefully acknowledge the use of D8 Discover equipment belonging to the Instrument Center of National Cheng Kung University.
Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
PY - 2023/3
Y1 - 2023/3
N2 - Pure and Mg-substituted AgCaVO4 compounds were explored using the conventional solid-state sintering method and their microwave dielectric properties were investigated. The XRD patterns indicate all samples belong to an orthorhombic structure with a space group of Pmna. The pure AgCaVO4 ceramic gives the dielectric properties: εr of 11.7, Q × f of 15,000 GHz, and τf of38 ppm/°C at 530 °C. The value of τf is correlated with the bond valence. In a limited range (x = 0.03–0.05), a small amount of Mg substitution can not only reduce the dielectric loss, but also increase the dielectric constant of the AgCa1−xMgxVO4 specimen. AgCa0.97Mg0.03VO4 ceramic sintered at 530 °C exhibits optimum properties of εr = 12, Q × f = 23,000 GHz and τf = –35 ppm/°C at microwave frequencies. The ceramic also shows good chemical compatibility with aluminum, providing a promising candidate for ULTCC applications.
AB - Pure and Mg-substituted AgCaVO4 compounds were explored using the conventional solid-state sintering method and their microwave dielectric properties were investigated. The XRD patterns indicate all samples belong to an orthorhombic structure with a space group of Pmna. The pure AgCaVO4 ceramic gives the dielectric properties: εr of 11.7, Q × f of 15,000 GHz, and τf of38 ppm/°C at 530 °C. The value of τf is correlated with the bond valence. In a limited range (x = 0.03–0.05), a small amount of Mg substitution can not only reduce the dielectric loss, but also increase the dielectric constant of the AgCa1−xMgxVO4 specimen. AgCa0.97Mg0.03VO4 ceramic sintered at 530 °C exhibits optimum properties of εr = 12, Q × f = 23,000 GHz and τf = –35 ppm/°C at microwave frequencies. The ceramic also shows good chemical compatibility with aluminum, providing a promising candidate for ULTCC applications.
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U2 - 10.1007/s00339-023-06501-8
DO - 10.1007/s00339-023-06501-8
M3 - Article
AN - SCOPUS:85149025192
SN - 0947-8396
VL - 129
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 3
M1 - 211
ER -