Thermistor with leads and method of making

Details Thermistor with leads and method of making Thermistor with leads and method of making

1976-12-20

1977-10-11

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

29612, 29621, 65 59R, 252512, 338322, 338327, 357 65, 357 67, 428328, 428411, 428471, H01C 702

Patent

active

040538648

ABSTRACT:
A PTCR thermistor has a doped barium titanate body, and two base metal lead wires being bonded to and ohmically connected to two separate surface regions of the body by means of two conductive electrodes, respectively. The electrodes are comprised of aluminum particles being bound within a matrix of a lead borate glass. The glass amounts to from 20 to 60% by weight. The simple method of making the thermistor may include the selective application of heat to the electrode regions to avoid oxidizing the base metal leads. These thermistors are capable of undergoing many self-heating switching operations in service without deterioration of the lead to body connections.

REFERENCES:
patent: 2752663 (1956-07-01), White et al.
patent: 3019198 (1962-01-01), Dumesnil
patent: 3231522 (1966-01-01), Blodgett et al.
patent: 3310718 (1967-03-01), Lupfer
patent: 3457539 (1969-07-01), Lupfer
patent: 3547835 (1970-12-01), Short
patent: 3676211 (1972-07-01), Kourtesis et al.
patent: 3808046 (1974-04-01), Davey

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