Heterogeneous multilayer dielectric ceramics enabled by ultralow‐temperature self‐constrained sintering

Abstract

In the present work, heterogeneous multilayer ceramics based on two representative dielectrics, low‐K Li2MoO4 (LM) and high‐K [(Li0.5Bi0.5)xBi1−x][MoxV1−x]O4 (LBMV), are successfully acquired using a convenient approach of self‐constrained sintering at an ultralow temperature of 600°C. These two materials with proximate but distinct sintering temperature ranges mutually act as constrained layers to each other in the process of densification, yielding significantly suppressed in‐plane shrinkage of the LM/LBMV heterogeneous multilayer ceramics. Moreover, the dense heterostructures are endowed with decent mechanical and microwave dielectric properties. This work offers a new paradigm for facilely integrating heterogeneous dielectric materials for ultralow‐temperature co‐fired ceramics applications.

Low Temperature Sintering, Structure and Microwave Dielectric Properties of Novel (1 – x)MgGa2O4–xCuMoO4 Ceramics for LTCC Applications

“…Considering recent studies, molybdate ceramics always have ultralow temperatures. − Especially, CuMoO 4 , − the sintering temperature of which was 650 °C presented a low ε r = 8, a high Q × f = 53,000 GHz (at 12.7 GHz frequency), and τ f = −36 ppm/°C. However, the effect of CuMoO 4 on reducing the sintering temperature has not been explored.…”