Effect of Nb2O5 Addition to the Electrical Properties of Fe2TiO5 Ceramics-Based NTC Thermistor

• Published in: Materials science forum Vol. 827; pp. 262 - 265
• Main Authors: Wiendartun, Wiendartun, Siregar, Rustam E., Risdiana, Risdiana, Fitrilawati, Fitrilawati
• Format: Journal Article
• Language: English
• Published: Pfaffikon Trans Tech Publications Ltd 01.08.2015
• Subjects: Thermistor; Fe2TiO5; Ceramic; Nb2O5; NTC
• ISSN: 0255-5476; 1662-9752; 1662-9752
• DOI: 10.4028/www.scientific.net/MSF.827.262

The aims of this research is to identify the effect of Nb2O5 addition on the electrical properties of Fe2TiO5 ceramics-based NTC thermistor.The concentration of Fe2O3 and TiO2 was proportional to Fe2TiO5, whereas the concentration value of Nb2O5 were 0, 0.5 and 1.0 mole %, respectively. Within two hours, the mixed powder was pressed at 4 ton/cm2 to form pellets and sintered at 1300 °C in air. It can perceived from the XRD data that the sintered ceramics had single phase of Fe2TiO5, pseudobrookite. From SEM data, it is found that addition of Nb2O5 decreases the grain size. The addition of Nb2O5 increases thermistor constant, activation energy and electrical resistance of Fe2TiO5 ceramics. The values of thermistor constant of Nb2O5 added-Fe2TiO5 ceramics were relatively large, indicated that the ceramics were aplicable as the NTC thermistor.