Sintering Temperatures Investigation on the Electrical Characteristics of Fe2TiO5/MnO2 Ceramics-Based NTC Thermistor

Wiendartun Wiendartun; Dadi Rusdiana; Andhy Setiawan

doi:10.4028/www.scientific.net/MSF.917.74

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HomeMaterials Science ForumMaterials Science Forum Vol. 917Sintering Temperatures Investigation on the...

Sintering Temperatures Investigation on the Electrical Characteristics of Fe₂TiO₅/MnO₂ Ceramics-Based NTC Thermistor

Abstract:

Fabrication of Fe₂TiO₅pellet/disk ceramics-based NTC thermistor has been performed, in order to know the effect of sintering tempertures on the electrical characteristic of 1.0 mole % MnO₂doped-Fe₂TiO₅ ceramics. These ceramics were made by mixing commercial powders of Fe₂O₃, TiO₂ and MnO₂with proportional composition to produce Fe₂TiO₅ based ceramic. The raw pellet was sintered at 1100 °C, 1200 °C and 1300 °C temperature for 2 hours in air. Analysis of the microstructure and crystal structure were performed by using a scanning electron microscope (SEM) and x-ray diffraction (XRD) respectively. XRD pattern showed that all of Fe₂TiO₅ceramics made at various sintering temperatures are orthorhombic The SEM images showed that the grain size of pellet ceramics increase with increasing sintering temperatures. From electrical data that was measured at temperature 30-300 °C, showed that the addition of sintering temperature decreased the thermistor constant (B), activation energy (E_a), thermistor sensitivity (α) and room temperature resistance (R_RT). Thermistor constant (B) of the ceramics was relatively big of 5778 K to 6707 K. The value of B indicated that ceramics made in this work fit the market requirement for NTC thermistor.

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Materials Science Forum (Volume 917)

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74-77

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https://doi.org/10.4028/www.scientific.net/MSF.917.74

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March 2018

Authors:

Wiendartun Wiendartun*, Dadi Rusdiana, Andhy Setiawan

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Fe₂TiO₅ Ceramics, MnO₂, NTC Thermistor, Sintering Temperature

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