Fabrication and characterization of a multilayer PTCR thermistor |
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| Authors: | B V Hiremath R E Newnham Ahmed Amin |
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| Affiliation: |
a Engineering Research Center, AT&T, Princeton, NJ
b Materials Research Laboratory, The Pennsylvania State University, PA, U.S.A.
c Texas Instruments, Inc., Attleboro, MA |
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| Abstract: | A method has been developed to decrease the room temperature resistance of a PTCR barium titanate ceramic by introducing internal electrodes in a configuration analogous to multilayer capacitors. A multilayer thermistor containing four (n=4) tape cast layers of PTCR barium titanate was fabricated with internal electrodes. A reference sample of the same PTCR barium titanate without internal electrodes was fabricated with the same external dimensions as those of the multilayer thermistor. As predicted by theory, it was found that the resistance of the multilayer thermistor is approximately 16 (n2=16) times smaller than the test specimen with little change in the PTCR effect of the multilayer thermistor. |
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