Plasma Sprayed Resistors
Author(s) -
David Smith,
J.C. Anderson
Publication year - 1980
Publication title -
active and passive electronic components
Language(s) - English
Resource type - Journals
eISSN - 1026-7034
pISSN - 0882-7516
DOI - 10.1155/apec.7.125
Subject(s) - semiconductor , materials science , insulator (electricity) , plasma , inflection point , electrical resistivity and conductivity , conductor , composition (language) , resistor , arc (geometry) , composite material , analytical chemistry (journal) , metallurgy , condensed matter physics , optoelectronics , chemistry , electrical engineering , geometry , mathematics , linguistics , philosophy , physics , chromatography , quantum mechanics , voltage , engineering
A range of films of mixed composition, prepared by arc plasma spraying, has been investigated. Both free powder and powder in a plastic binder forming a rod have been used in the spray process. A variety of mixtures of insulators, metals and semiconductors has been examined and it is shown that resistivity/temperature curves for the specimens produced have in general two points of inflection, the temperatures of which vary with composition. This allows prediction of a composition giving low T.C.R. at room temperatures for any given metal/semiconductor combination. A qualitative theoretical model explaining this effect is presented. It has also been demonstrated that a conductor/insulator combination need not necessarily exhibit a sharp transition. This allows a broad range of resistance values to be obtained simply by varying composition.
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