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The tantalum furnace has a heater tube made from tantalum foil, and two radiation shields within the vacuum chamber. It is water cooled.

T [K]	heater power [W]	U(prim) [V]	I(prim) [A]	I(2nd) [A]	T(wall) [K]	cooling rate [K/min]
1400	2730	152	17.8	4 x 70.4	350
1300	2060	130	15.8	4 x 57	330
1200	1500	110	14.1	4 x 46	320
1100	1050	88	12.5	4 x 37.5	310
1000	730	70	10.8	4 x 29.8	303	> 50
900	480	58	9.0	4 x 23.3	298	50
800	325	50	7.5	4 x 18.0	293	30
700	195				291	17
600	120				290	10
500	74				289	4
450	53				289	3
400	38			4 x 4.7	289	1.5

Temperature of the connections at 1400 K: 90-100 deg Celsius

The furnace must not be vented above 373 K. Cool down from 1400 K takes about 90 min, from 500 K still 60 min!

Sketch of tantalum furnace (not to scale)

Connection of Furnace:

Attachments: tantalofen2.jpg FTconn2.png TantalumFurnace.png tantalofen1.jpg FT_conn1.png tantalofen3.jpg

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This page last changed on 13-Jun-2013 12:22:34 UTC by MarkusZolliker.