Abstract
Fabrication of CuFe 2 O 4 thick film ceramics utilizing Fe 2 O 3 derived from yarosite using screen printing technique for NTC thermistor has been carried out. Effect of glass frit addition (0, 2.5, 5 weight %) has been studied. X-ray diffraction analyses (XRD) was done to know crystal structure and phases formation. SEM analyses were carried out to know microstructure of the films. Electrical properties characterization was done through measurement of electrical resistance at various temperatures (room temperature to 100°C). The XRD data showed that the films crystalize in tetragonal spinel. The SEM images showed that glass frit addition made the grain size smaller. Electrical data showed that the larger the glass frit concentration, the larger the resistance, thermistor constant and sensitivity. From the electrical characteristics data, it was known that the electrical characteristics of the CuFe 2 O 4 thick film ceramics followed the NTC characteristic. The value of B and R RT of the produced CuFe 2 O 4 ceramics namely B = 2215-2807 o K and r RT = 6,9-16,7 M Ohm, fitted market requirement.
Highlights
NTC thermistor is widely applied in many applications such as temperature sensor, electric current limiter, flowrate meter and pressure sensor (Anonymous, 2008)
One of the spinel ceramics may be applied as NTC thermistor is CuFe2O4 ceramic
The effect of different glass frit concentration on the characteristics, especially the electrical characteristics, of the CuFe2O4 thick film ceramics for NTC thermistor is the focus of the study
Summary
NTC thermistor is widely applied in many applications such as temperature sensor, electric current limiter, flowrate meter and pressure sensor (Anonymous, 2008). Many efforts can be performed in order to improve the characteristic of the NTC thermistor having spinel structure. One of the spinel ceramics may be applied as NTC thermistor is CuFe2O4 ceramic. The thermistor may be produced in the form of disk or thick film. The object of study is the thick film thermistor. Technology generally used for fabrication of thick film thermistor is screen printing which is technically simple. A study on fabrication of thick film thermistor based on CuFe2O4 with different glass frit concentration was performed. The effect of different glass frit concentration on the characteristics, especially the electrical characteristics, of the CuFe2O4 thick film ceramics for NTC thermistor is the focus of the study
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
