TY - JOUR
T1 - A low-loss, low temperature sintering dielectric using Ba1-xSrxMg2(VO4)2 ceramics and its applications at microwave frequencies
AU - Huang, Cheng Liang
AU - Chu, Tsung Min
AU - Tsai, Meng Hung
N1 - Funding Information:
This work was financially supported by the Ministry of Science and Technology of Taiwan under grant MOST 109-2221-E-006-139. The authors gratefully acknowledge the use of D8 Discover equipment belonging to the Instrument Center of National Cheng Kung University.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/6
Y1 - 2021/6
N2 - Polycrystalline Ba1-xSrxMg2(VO4)2 compounds were investigated as a promising microwave dielectric for low-temperature co-fired ceramics (LTCC) applications. The single tetragonal phase was detected for the BaMg2(VO4)2 compound, and a phase transition from BaMg2(VO4)2 to SrMg2(VO4)2 was observed with an increase in the Sr substitution. The Raman spectrum was recorded to clarify the vibration and rotation modes of the specimen. The τf values was improved dramatically from –42.8 to –4.5 ppm/°C with a minute Sr substitution (x = 0.15) in place of Ba. Combined excellent microwave dielectric properties (εr ~ 13.1, Q × f ~ 71,000 GHz and τf ~ –4.5 ppm/°C) can be obtained for specimens using Ba0.85Sr0.15Mg2(VO4)2 sintered at 950 °C for 4 h. In addition, an U-type band-pass filter with two transmission zeroes was designed and fabricated on the ceramic substrates. Not only the circuit size was reduced, an excellent filter performance was also obtained. Thus, these compounds constitute very promising materials for LTCC applications.
AB - Polycrystalline Ba1-xSrxMg2(VO4)2 compounds were investigated as a promising microwave dielectric for low-temperature co-fired ceramics (LTCC) applications. The single tetragonal phase was detected for the BaMg2(VO4)2 compound, and a phase transition from BaMg2(VO4)2 to SrMg2(VO4)2 was observed with an increase in the Sr substitution. The Raman spectrum was recorded to clarify the vibration and rotation modes of the specimen. The τf values was improved dramatically from –42.8 to –4.5 ppm/°C with a minute Sr substitution (x = 0.15) in place of Ba. Combined excellent microwave dielectric properties (εr ~ 13.1, Q × f ~ 71,000 GHz and τf ~ –4.5 ppm/°C) can be obtained for specimens using Ba0.85Sr0.15Mg2(VO4)2 sintered at 950 °C for 4 h. In addition, an U-type band-pass filter with two transmission zeroes was designed and fabricated on the ceramic substrates. Not only the circuit size was reduced, an excellent filter performance was also obtained. Thus, these compounds constitute very promising materials for LTCC applications.
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U2 - 10.1016/j.mseb.2021.115114
DO - 10.1016/j.mseb.2021.115114
M3 - Article
AN - SCOPUS:85102043262
SN - 0921-5107
VL - 268
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
M1 - 115114
ER -