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A novel BaMgSi4O10 microwave dielectric ceramic for LTCC application

Luo Zhenli,Cai Yiyang,Yin Changzhi,Cheng Mingfei,Lei Weicheng,Lu Wenzhong,Song Xiaoqiang,Lei Wen

A novel BaMgSi 4 O 10 ceramic was fabricated using a conventional solid-state method. The BaMgSi 4 O 10 accompanied with BaMgSiO 5 , Ba 2 MgSi 2 O 7 , and SiO 2 was detected for all compositions. Furthermore, microwave dielectric properties with ε r  = 5.7 , Q  ×  f  = 17,900 GHz, and τ f  = − 19.1 ppm/°C were obtained at 1100 °C. To meet the requirement of LTCC technology, the optimum temperature can be lower than 850 °C by composing with 2 wt% LMS glass with a short soaking time of 0.5 h. A patch antenna was fabricated using BaMgSi 4 O 10 -2 wt% LMS as the substrate with a bandwidth of 120 MHz at 4.12 GHz. All result indicates BaMgSi 4 O 10 -2 wt% LMS ceramic has large application prospect in wireless communication systems.