High temperature diffusion furnace

Details High temperature diffusion furnace High temperature diffusion furnace

1991-04-19

1992-03-10

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219390, 219549, H05B 366

Patent

active

050951920

ABSTRACT:
The furnace 70 includes a heating element 72 which is restrained from growth during operation of the furnace 70 by retaining spacers 84 which provide a yoke 88 around the individual coils 102 of the heating element 72 and which spacers 84 are interlocked with each other. A high alumina fiber insulation 180 is applied to insulate the heating element 72. This high alumina fiber insulation 180 has enhanced properties with respect to shrinkage and devitrification.

REFERENCES:
patent: 1240584 (1917-09-01), Lardway
patent: 2097981 (1937-11-01), Karcher
patent: 3299196 (1967-01-01), Lasch
patent: 3933200 (1976-01-01), Cunningham
patent: 4147888 (1979-04-01), Sato
patent: 4849608 (1989-07-01), Muraoka

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