TY - JOUR
T1 - Microwave dielectric properties of the (1−x)La(Nb0.9V0.1)O4-xCaMoO4 (0.05 ≤ x ≤ 0.50) scheelite solid solution ceramics
AU - Ma, Zhili
AU - Zhao, Jinxiong
AU - Zhou, Di
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/6/15
Y1 - 2019/6/15
N2 - The CaMoO4 was added into La(Nb0.9V0.1)O4 ceramics by solid state reaction method to adjust the temperature coefficient of frequency (TCF) values. The series of (1−x)La(Nb0.9V0.1)O4-xCaMoO4 (0.05 ≤ x ≤ 0.5) ceramics were sintered at 1060–1180 °C and found to possess permittivity (εr) = 10.38–17.73, Q × f = 31,820–76,570 GHz (Q = 1/dielectric loss, f = resonant frequency lying between 8.5 and 9 GHz), and TCF = −26.3 ∼ +160.7 ppm/°C. The structures of ceramic samples changed from monoclinic fergusonite to tetragonal scheelite continuously at x = 0.20 along with the shift of TCF values from positive to negative. The best microwave dielectric properties with εr = 15.71, Q × f = 76,310 GHz (at 8.825 GHz), and TCF = − 26.3 ppm/°C were obtained in 0.8La(Nb0.9V0.1)O4-0.2CaMoO4 ceramics sintered at 1160 °C and these ceramics might be good candidates for microwave devices.
AB - The CaMoO4 was added into La(Nb0.9V0.1)O4 ceramics by solid state reaction method to adjust the temperature coefficient of frequency (TCF) values. The series of (1−x)La(Nb0.9V0.1)O4-xCaMoO4 (0.05 ≤ x ≤ 0.5) ceramics were sintered at 1060–1180 °C and found to possess permittivity (εr) = 10.38–17.73, Q × f = 31,820–76,570 GHz (Q = 1/dielectric loss, f = resonant frequency lying between 8.5 and 9 GHz), and TCF = −26.3 ∼ +160.7 ppm/°C. The structures of ceramic samples changed from monoclinic fergusonite to tetragonal scheelite continuously at x = 0.20 along with the shift of TCF values from positive to negative. The best microwave dielectric properties with εr = 15.71, Q × f = 76,310 GHz (at 8.825 GHz), and TCF = − 26.3 ppm/°C were obtained in 0.8La(Nb0.9V0.1)O4-0.2CaMoO4 ceramics sintered at 1160 °C and these ceramics might be good candidates for microwave devices.
KW - LaNbO
KW - Low temperature co-fired ceramic (LTCC)
KW - Microwave dielectric
UR - https://www.scopus.com/pages/publications/85062687972
U2 - 10.1016/j.jallcom.2019.03.057
DO - 10.1016/j.jallcom.2019.03.057
M3 - 文章
AN - SCOPUS:85062687972
SN - 0925-8388
VL - 789
SP - 345
EP - 350
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -