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.