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An experimental high temperature high vacuum furnace with self-supported tungsten resistance heating elements is described. The furnace is assembled from readily obtainable parts, and knife-edge vacuum seals are used through-out. The volume of the hot chamber is approximately 2 in. diameter by 8 in. high; the uniform zone is 2 in. long. A temperature of 2000°C can be attained at a pressure of ∼10−5 mm Hg and at a power expenditure of 12 kw.
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Cohen et al. (1960) studied this question.
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