Heating rate regulator

Details Heating rate regulator Heating rate regulator

1993-06-21

1995-06-20

Lateef, Marvin M.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

338 22R, 338 22SD, H05B 102

Patent

active

054262798

ABSTRACT:
A ceramic heating rate regulator for electrically powered thermal treatment operations is described. The regulator is made of a ceramic mixture containing molybdenum disilicide, which is an electrically conductive substance undergoing crystal structure transformation above 700.degree. C. The regulator comprises an elongated ceramic rod containing high concentration of molybdenum disilicide, the rod is subsequently insulated by a ceramic cylinder which contains silicon nitride and low concentrations of molybdenum disilicide. The regulator when incorporated in the heating circuit of the thermal treatment furnace will itself heat up and thus reduce the size of the heating current flowing in the circuit, as soon as the temperature of the regulator has reached the transformation temperature of molybdenum disilicide. The heating rate regulator is designed to be used in conjunction with conventional temperature controlling devices.

REFERENCES:
patent: 3556496 (1971-01-01), Hucke
patent: 4610435 (1986-09-01), Pfau et al.
patent: 4889483 (1989-12-01), Gentry
patent: 5146536 (1992-09-01), Westover

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