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Microwave Dielectric Properties of (Mg 0.95 Ni 0.05 )TiO 3 –SrTiO 3 Ceramics with a Near‐Zero Temperature Coefficient of Resonant Frequency
Author(s) -
Shen ChunHsu,
Huang ChengLiang
Publication year - 2010
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02352.x
Subject(s) - materials science , dielectric , temperature coefficient , ceramic , microwave , analytical chemistry (journal) , composite material , optoelectronics , telecommunications , computer science , chemistry , chromatography
The microwave dielectric properties of a (1− x )(Mg 0.95 Ni 0.05 )TiO 3 – x SrTiO 3 ceramics system were investigated. The system was prepared using a conventional solid‐state ceramic method. To produce a temperature‐stable material, SrTiO 3 was added, which led to a near‐zero temperature variation in resonant frequency. The variation in microwave dielectric properties of the (1− x )(Mg 0.95 Ni 0.05 )TiO 3 – x SrTiO 3 ceramics system significantly depends on the amount of SrTiO 3 present. As x was varied from 0.01 to 0.1, the microwave Q × f value decreased from 105,000 to 31,000 GHz and the dielectric constant (ɛ r ) increased from 18.74 to 26.5. A microwave dielectric material with a dielectric constant (ɛ r ) of 21, a Q × f value of 73,000 GHz, and a τ f value of 1 ppm/°C were obtained from the compound 0.96(Mg 0.95 Ni 0.05 )TiO 3 –0.04SrTiO 3 sintered at 1300°C for 4 h. To verify the performance of the 0.96(Mg 0.95 Ni 0.05 )TiO 3 –0.04SrTiO 3 ceramics, a band‐pass filter with traditional hairpin resonators was designed and simulated on different dielectric materials [such as FR4, alumina, and 0.96(Mg 0.95 Ni 0.05 )TiO 3 –0.04SrTiO 3 ].