A low-firing Ca5Ni4(VO4)(6) ceramic with tunable microwave dielectric properties and chemical compatibility with Ag
A low-firing Ca5Ni4(VO4)(6) ceramic with tunable microwave dielectric properties and chemical compatibility with Ag
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一种低烧 Ca5Ni4(VO4)(6) 陶瓷，具有可调谐微波介电性能和与 Ag 的化学兼容性
DOI：
10.1016/j.ceramint.2016.06.085
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发表时间：
2016
影响因子：
5.2
通讯作者：
Li Chunchun
中科院分区：
文献类型：
--
作者：
Wang Dan;Xiang Huaicheng;Tang Ying;Fang Liang;Khaliq Jibran;Li Chunchun
采用常规固相反应方法制备了具有缺位石榴石结构的Ca5Ni4(VO4)6低损耗微波介质陶瓷。 Ca5Ni4(VO4)6在980°C下烧结4小时至相对密度为96.2%，表现出良好的微波介电性能，例如介电常数为10.9，aQ×f值为96,500 GHz，τf值为-63.6 ppm/°C。其较大的负τf可以通过与LiCa2Mg2V3O12形成固溶体来补偿，这使得0.8Ca5Ni4(VO4)6−0.2LiCa2Mg2V3O12在955°C下烧结4小时后性能得到改善，τf=−3.7ppm/°C，εr=10.2，Q×f=59,300GHz。此外，0.8Ca5Ni4(VO4)6−0.2LiCa2Mg2V3O12 被证明与 Ag 电极化学相容，因此它可能是 LTCC 应用的可能候选材料。
A Ca5Ni4(VO4)6low loss microwave dielectric ceramic with A site deficient garnet structure was prepared via the conventional solid state reaction method. Ca5Ni4(VO4)6sintered at 980 °C for 4 h to a relative density of 96.2% exhibits favorable microwave dielectric properties such as a permittivity of 10.9, aQ×fvalue of 96,500 GHz, and aτfvalue of −63.6 ppm/°C. Its large negativeτfcould be compensated by forming a solid solution with LiCa2Mg2V3O12, that led to improved properties with a near-zeroτf=−3.7 ppm/°C,εr=10.2,Q×f=59,300 GHz for 0.8Ca5Ni4(VO4)6−0.2LiCa2Mg2V3O12after sintering at 955 °C for 4 h. Further on, 0.8Ca5Ni4(VO4)6−0.2LiCa2Mg2V3O12proved to be chemically compatible with Ag electrodes, so it might be a possible candidate for LTCC applications.