ELECTRICAL CHARACTERISTICS CuFe2O4 THICK FILM CERAMICS WITH THICKNESS VARIATION FIRED AT 1000 oC
Abstract
Abstract: Fabrication of CuFe2O4 thick film ceramics utilizing Fe2O3 derived from jarosite using screen printing technique for NTC thermistor has been carried out. Effect of thickness variation has been studied. X-ray diffraction analyses (XRD) was used to study crystal structure and phases formation. SEM analyses was carried out to know microstructure of the films. Electrical properties characterization was taken through measurement of electrical resistance at various temperatures (room temperature to 100 oC). The XRD data showed that the films crystalize in tetragonal spinel. The SEM images showed that the thickness variation makes grain size of the films was bigger. The larger of the thickness variation, the smaller the resistance, thermistor constant and sensitivity. From the electrical characteristics data, it was known that the electrical characteristics of the CuFe2O4 thick film ceramics followed the NTC characteristic. The value of B and RRT of the produced CuFe2O4 ceramics namely B = 2102-4704 K and RRT = 10 -186 M 0hm, fitted market requirement.