Niobate system low-temperature sintered microwave dielectric ceramic material and preparation method thereof

Abstract

The invention discloses a niobate system low-temperature sintered microwave dielectric ceramic material and a preparation method thereof, and belongs to the field of microwave electronic ceramic materials and preparation thereof. The niobate system low-temperature sintered microwave dielectric ceramic material comprises a main crystal phase and zinc-boron glass accounting for 1-4% of the weight of the main crystal phase, and the main crystal phase is Ni1-xZnxTiNb2O8, wherein x is not less than 0.2 and not more than 0.8; and the zinc-boron glass (by standard material) comprises 50-70 mol% of ZnO and 30-50 mol% of HBO3. The ceramic material can be well sintered at 900-950 DEG C, the dielectric constant epsilon r is 32-35, the Q*f value is 13000-21000 GHz, the resonant frequency temperature coefficient tau f is -15 ~ +6 ppm / DEG C, and the ceramic material can be widely applied to LTCC laminated microwave devices.

Description

technical field [0001] The invention belongs to the field of microwave electronic ceramic materials and their preparation, in particular to a niobate-based low temperature co-fired ceramic (Low Temperature Co-fired Ceramic, LTCC for short) material with medium dielectric constant, low loss characteristics and high temperature stability and its preparation method. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in circuits in the microwave frequency band (mainly 300MHz-30GHz frequency band) and perform one or more functions. They are widely used in resonators, dielectric filters, and substrates in modern communications. , Waveguide circuits and other components. With the continuous upgrading of mobile communication technology and the upgrading and popularization of various communication equipment, the requirements for devices and materials will become higher and higher. [0003] The application of microwave...

AI Technical Summary

Problems solved by technology

J.X.Bi et al. (J.X.Bi, C.H.Yang, H.T.Wu. Synthesis, characterization, and microwave dielectric properties of Ni 0.5 Ti 0.5 NbO 4 ceramics through theaqueous sol-gel process, J.Alloys Compd.653(2015)1-6) reported a niobate microwave dielectric ceramic material Ni 0.5 Ti 0.5 NbO 4 , which has a high dielectric constant ε r =59.95 and higher Q×f=15094GHz, but its resonant frequency temperature coefficient τ f =111.15ppm / °C, and the sintering temperature is high (1100°C)

Images