TY - JOUR
T1 - A low-firing Ca5Ni4(VO4)6 ceramic with tunable microwave dielectric properties and chemical compatibility with Ag
AU - Wang, Dan
AU - Xiang, Huaicheng
AU - Tang, Ying
AU - Fang, Liang
AU - Khaliq, Jibran
AU - Li, Chunchun
PY - 2016
Y1 - 2016
N2 - A Ca5Ni4(VO4)6 low loss microwave dielectric ceramic with A site deficient garnet structure was prepared via the conventional solid state reaction method. Ca5Ni4(VO4)6 sintered at 980°C for 4h to a relative density of 96.2% exhibits favorable microwave dielectric properties such as a permittivity of 10.9, a Q×f value of 96,500GHz, and a τ f value of -63.6ppm/°C. Its large negative τ f could be compensated by forming a solid solution with LiCa2Mg2V3O12, that led to improved properties with a near-zero τ f =-3.7ppm/°C, ε r =10.2, Q×f=59,300GHz for 0.8Ca5Ni4(VO4)6-0.2LiCa2Mg2V3O12 after sintering at 955°C for 4h. Further on, 0.8Ca5Ni4(VO4)6-0.2LiCa2Mg2V3O12 proved to be chemically compatible with Ag electrodes, so it might be a possible candidate for LTCC applications.
AB - A Ca5Ni4(VO4)6 low loss microwave dielectric ceramic with A site deficient garnet structure was prepared via the conventional solid state reaction method. Ca5Ni4(VO4)6 sintered at 980°C for 4h to a relative density of 96.2% exhibits favorable microwave dielectric properties such as a permittivity of 10.9, a Q×f value of 96,500GHz, and a τ f value of -63.6ppm/°C. Its large negative τ f could be compensated by forming a solid solution with LiCa2Mg2V3O12, that led to improved properties with a near-zero τ f =-3.7ppm/°C, ε r =10.2, Q×f=59,300GHz for 0.8Ca5Ni4(VO4)6-0.2LiCa2Mg2V3O12 after sintering at 955°C for 4h. Further on, 0.8Ca5Ni4(VO4)6-0.2LiCa2Mg2V3O12 proved to be chemically compatible with Ag electrodes, so it might be a possible candidate for LTCC applications.
KW - Garnet structure
KW - LTCC
KW - Microwave dielectric properties
KW - Vanadate
UR - http://www.scopus.com/inward/record.url?scp=85006489851&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2016.06.085
DO - 10.1016/j.ceramint.2016.06.085
M3 - Article
AN - SCOPUS:85006489851
SN - 0272-8842
VL - 42
SP - 15094
EP - 15098
JO - Ceramics International
JF - Ceramics International
IS - 13
ER -