Gradient oven for oriented solidification, in particular by the

Details Gradient oven for oriented solidification, in particular by the Gradient oven for oriented solidification, in particular by the

1988-04-18

1989-06-06

Yuen, Henry C.

Heating

Work chamber having heating means

Externally heated, liquid holding type of work container

432 13, 1263435A, F27B 1400, E01C 1945

Patent

active

048367710

ABSTRACT:
The gradient oven for oriented solidification, in particular by the Bridgman method, comprises an enclosure (4) successively defining along a cartridge (7): a heating zone (1), an adiabatic zone (2), and a heat sink (3). Means (8) are provided for displacing the cartridge (7) at a predetermined speed relative to the enclosure (4). The adiabatic zone (2) of the gradient oven includes an outer fixed annular portion (21) mounted in fixed manner inside the enclosure (4), and a removable annular portion (22) which is coaxial with said fixed annular portion and which is mounted inside it, with the removable annular portion (22) being constituted by an assembly of components (221 to 224) having different thermal conductivities, thereby adapting the characteristics of the adiabatic zone (2) to the characteristics of the sample contained in the cartridge (7).

REFERENCES:
patent: 2358624 (1944-09-01), Burry
patent: 2773496 (1956-12-01), Czarnecki
patent: 3604693 (1971-09-01), Groepler
patent: 4024854 (1977-05-01), Park et al.
patent: 4027656 (1977-06-01), Geddes et al.
patent: 4402304 (1983-09-01), Corey
patent: 4505669 (1985-03-01), Rogers
patent: 4623279 (1986-11-01), Smith

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