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Preparation and microwave dielectric properties of CaTiO3 added Mg0.95Ni0.05Ti0.98Zr0.02O3 composite ceramics for high frequency applications

Manan Abdul, Nawaz Asif, Ahmad Arbab Safeer, Ullah Atta, Wazir Arshad Hussain, Shah Abid A.

Materials Science Poland

2019

Vol. 37, No. 4

639--644

Mg0.95Ni0.05Ti0.98Zr0.02O3 and CaTiO3 were prepared separately using solid state reaction method. The effect of CaTiO3 addition on the microwave dielectric properties of Mg0.95Ni0.05Ti0.98Zr0.02O3was investigated to get low loss and temperature stable ceramics in (1 – x)Mg0.95Ni0.05Ti0.98Zr0.02O3 and CaTiO3 series. Mg0.95Ni0.05Ti0.98Zr0.02O3formed as the major phase along with Mg0.95Ni0.05Ti2O5 phase that formed as minor secondary phase for the composition with x = 0. Microwave dielectric properties ∈r ~ 17.1, Qufo of 195,855 GHz and τf of –46.3 ppm/°C were obtained for the composition with x = 0. The positive τf value of CaTiO3, tuned the τf value of Mg0.95Ni0.05Ti0.98Zr0.02O3through zero and ∈r ~ 28.4, Qufo ~ 108,775 GHz and τf ~ 3.1 ppm/°C were attained for x = 0.15 in this study. This composition is the best choice for high frequency applications.