Research On Mn-Co-Ni-Cu System Thermistor Formula And Process

As developed basic electronic components, negative temperature coefficientresistance elements have been used in varies of fields in electronic industry. In thesedevices, Mn-Co-Ni-Cu series have a larger manufacture scale with some significantproblems in producing process. Thus, research on this has a high value in theory andpractice.This dissertation studies the Mn-Co-Ni-Cu system with negative temperaturecoefficient thermistor element formulation and manufacturing process, including therole of various additives, in particular, V and Bi elements on a number of componentperformances and optimization of process conditions.Specifically, Mn-Co-Ni-Cu quaternary system thermal resistance at25℃to300℃with a range of negative resistance characteristics,can be used to prepare a negativetemperature coefficient thermistor. To meet the plant’s request on the basis of theoriginal formula, to create a different room-temperature resistivity values NTCR, triedand flux, by trying different amounts of doping required to find the symbol of the newformula. At the same time, the maximum sintering temperature of different experiments,to meet the test requirements to find a new sintering curve, the particle size and sintereddensity under the curve have been greatly improved. Finally, the new formula for theSEM and EDS analysis, in-depth understanding of the new formulation of themicroscopic atomic sample distribution system.