Geometrical and electrical properties of NTC polycrystalline thermistors vs. Changes of sintering parameters
АуториSavić, Slavica M.
Nikolić, Pantelija M.
Остала ауторстваRistić, Momčilo M.
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NTC thermistor powder was made of a Mn, Ni, Fe and Co oxide mixture calcinated at 1050°C / 60 min. The powder was milled in a ball mill down to an average particle diameter of 0.9 μm. Small disc shaped pills of the powder obtained were made by pressing with a pressure of 2.5 MPa. The pills were sintered in the temperature range of 900-1400 °C for 30-240 min. The volume and specific volume resistivity change were measured as a function of sintering conditions. Microstructure development was observed using a SEM microscope. Using the results obtained, optimization of sintering parameters was performed in order to determine optimal electrical properties of the selected thermistor composition.
Кључне речи:(Mn, Ni, Fe, Co)3O4 / NTC thermistors / volume resistivity / microstructure / ball milling
Извор:Science of Sintering, 2006, 223-229
- Belgrade : International Institute for the Science of Sintering