Ceramic temperature stabilization body, and method of making sam

Details Ceramic temperature stabilization body, and method of making sam Ceramic temperature stabilization body, and method of making sam

1984-10-12

1986-12-09

Dixon, Jr., William R.

Heating

Processes of heating or heater operation

Controlling flame position or work atmosphere

501 96, 501 98, 75244, F27D 700

Patent

active

046278150

ABSTRACT:
The temperature stabilization body is made of pulverized aluminum nitride with a first additive of pulverized aluminum present between 0.05% to 2%, and a grain size of under 1 micrometer, and a second additive of from 0.1% to 10% of an oxide, preferably yttrium oxide, present at about 1%--all precentages by weight, in which the mixture is ground in a ceramic ball mill to a grain size of not over 0.1 mm, subjected to cold isostatic pressure in the order of 2500 bar to form a green, pressed body, and then sintered at a sintering temperature of between 1750.degree. C. to 2000.degree. C. The heat conductivity of the densely sintered aluminum nitride body will then be at least 140 W/m .degree.K., and a heat conductivity of twice as much can be obtained, the body being non-toxic and not subject to creep under temperatures up to at least 1700.degree. C.

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Ullmanns Encyclopedia der technischen Chemie 17, 1979, p. 519, Ullmanns . . . , p. 523.

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