Multilayer Perovskite-Based Thermistors Fabricated by LTCC Technology

In this work, single-phase La0.7Sr0.3Zr0.5Co0.22+Co0.33+O3 and La0.8Sr0.2Ti0.5Co0.32+Co0.33+O3 ceramics with the stable perovskite structure were utilized for fabrication of multilayer negative temperature coefficient thermistors. The number and thicknesses of ceramic layers were adjusted to attain suitable resistances in a desired temperature range. Scanning electron microscopy studies revealed a dense, fine-grained microstructure of ceramic layers, lack of delaminations and cracks at ceramic layer conductive layer boundaries and a good cooperation with conductive layers. The temperature coefficients of resistance of the fabricated multilayer thermistors were changing from 13 to 1%/K in the temperature range from 55 to 400 degrees C. DOI: 10.12693/APhysPolA.123.436