LaCr0.7Fe0.3O3-NiMn2O4 supported NTC composite ceramics with a sandwich-like structure

•Novel sandwich-like structure was first proposed to design new NTC thermistors and adjust their electrical properties.•LaCr0.7Fe0.3O3-NiMn2O4 supported sandwich-like structure NTC composite ceramics with controllable electrical properties and high stability were originally reported.•The sandwich layer composed of two basic phases mixture has played a significant role in compensating for the structural differences between two basic layers during sintering.