Gadzaman I. Thermistor elements for in-rush current limiting based on the CuxNi1-x-yCo2yMn2-yO4 ceramic semiconducting composites

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0499U003159

Thesis Registration Form

0499U003159.pdf

Applicant for

Specialization

  • 01.04.01 - Фізика приладів, елементів і систем

29-10-1999

Specialized Academic Board

Д 35.052.14

Lviv Polytechnic National University

Essay

The thesis is devoted to development of thermistor elements for in-rush current limiting of radioelectronic technigue based on ceramic semiconducting cjmposites of CuxNi1-x-yCo2yMn2-yO4 (0.1<=x<=0.8; 0.1<=y<=0.9-x) spinel group and to investigation of thermocompositional features of their manufacturig. It is shown that the technological features of high-temperature sintering, the level of microstructural inhomogeneity and the thermally activated redistribution of chemical elements in the cationic subsystem of ceramic matrix determine electrophysical properties of the prepared thermistors.The reversible character of the observed low-temperature processes is revealed. The mechanism of these processes is analyzed.

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