Bar and crucible magnetic suspension for a crystal-growing appar

Details Bar and crucible magnetic suspension for a crystal-growing appar Bar and crucible magnetic suspension for a crystal-growing appar

1985-09-04

1991-04-23

Doll, John

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including specific material of construction

1366171, 1366181, 13662073, 13662074, C30B 3500, C30B 1530

Patent

active

050098659

ABSTRACT:
A crystalline bar is drawn by a zone-melting process or from a melt in a crucible utilizing a magnetic suspension housing, in addition to an axial stabilization magnet, a radial stabilizer surrounding the core and including sensors for the radial position of the core-operating controllers for electromagnets surrounding the core to restore the core to its setpoint position. The fully magnetic suspension of the core eliminates friction while allowing enclosure of the crystal growth compartment to improve the quality of the crystal growth process.

REFERENCES:
patent: 2664496 (1953-12-01), Brace
patent: 3074785 (1963-01-01), Gremmelmaier
patent: 3154384 (1964-09-01), Jones
patent: 3203768 (1965-08-01), Tiller et al.
patent: 3211881 (1965-10-01), Jablonski et al.
patent: 3401021 (1968-09-01), Tiller et al.
patent: 4284605 (1981-10-01), Pierrat

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