A novel BaMgSi4O10 microwave dielectric ceramic for LTCC application

A novel BaMgSi4O10 ceramic was fabricated using a conventional solid-state method. The BaMgSi4O10 accompanied with BaMgSiO5, Ba2MgSi2O7, and SiO2 was detected for all compositions. Furthermore, microwave dielectric properties with epsilon r = 5.7,Q x f = 17,900 GHz, and tau f = - 19.1 ppm/degrees C were obtained at 1100 degrees C. To meet the requirement of LTCC technology, the optimum temperature can be lower than 850 degrees C by composing with 2 wt% LMS glass with a short soaking time of 0.5 h. A patch antenna was fabricated using BaMgSi4O10-2 wt% LMS as the substrate with a bandwidth of 120 MHz at 4.12 GHz. All result indicates BaMgSi4O10-2 wt% LMS ceramic has large application prospect in wireless communication systems.