Temperature Sensitive Spinel-Type Ceramics in Thick-Film Multilayer Performance for Environment Sensors
I. Hadzamana, H. Klyma,b, O. Shpotuyka, c and M. Brunnerd
a Lviv Institute of Materials of Scientific Research Company "Carat", Stryjska 202, 79031 Lviv, Ukraine
b Lviv Polytechnic National University, Bandera 12, 79013 Lviv, Ukraine
c Institute of Physics of Jan Długosz University of Czestochowa, al. Armii Krajowej 13/15, 42-201 Częstochowa, Poland
d Fachhochschule Köln/University of Applied Sciences, Betzdorfer 2, 50679 Köln, Germany
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Temperature sensitive thick films based on spinel-type semiconducting ceramics of different chemical composition Cu0.1Ni0.1Co1.6Mn1.2O4 (with p+-types of electrical conductivity), Cu0.1Ni0.8Co0.2Mn1.9O4 (with p-types of electrical conductivity) and their multilayer p+-p structures were fabricated and studied. These thick-film elements possess good electrophysical characteristics before and after long-term ageing test at 170°C. It is shown that degradation processes connected with diffusion of metallic Ag into film grain boundaries occur in one-layer p- and p+-conductive thick films. The p+-p structures were of high stability, the relative electrical drift was not greater than 1%.
DOI: 10.12693/APhysPolA.117.234
PACS numbers: 81.05.Je, 07.07.Df