HEAT PIPES FOR HIGH PRESSURE CZHOCHALSKI CRYSTAL FURNACES

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 3929
Amount: $167,585.00
Phase: Phase II
Program: SBIR
Awards Year: 1987
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
350 Second Ave, Waltham, MA, 02254
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Andrew C Harvey
 (617) 890-3200
Business Contact
Research Institution
N/A
Abstract
TO REDUCE THE CIRCUMFERENTIAL TEMPERATURE GRADIENTS DURING THE GROWTH OF IV - V COMPOUNDS AT HIGH TEMPERATURES AND PRESSURES (1325 DEG C AND 60 ATMOSPHERES), A HEAT PIPE CONSTRUCTION IS PROPOSED. THE PREFERRED HEAT PIPE IS IN THE FORM OF A SINGLE TOROID BUILT OF A TRILAYER CONSTRUCTION OF TUNGSTEN, GRAPHITE, AND SILICON CARBIDE, AND FILLED WITH LITHIUM. MULTIPLE TOROIDAL HEAT PIPES WOULD BE STACKED BETWEEN THE CRUCIBLE AND HEATING ELEMENTS, REDUCING CIRCUMFERENTIAL GRADIENTS, WHILE ALLOWING FOR VERTICAL TEMPERATURE CONTROL. THE HEAT PIPE CONSTRUCTION WILL BE ANALYZED AND TEST STRUCTURES FABRICATED. ALTERNATIVE DESIGNS AND MATERIALS WILL BE EVALUATED.

* Information listed above is at the time of submission. *

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