Lid for improved dendritic web growth

Patent · Tue Mar 24 04:00:00 EST 1992

OSTI ID:868201

Duncan, Charles S ^[1]; Kochka, Edgar L ^[2]; Piotrowski, Paul A ^[3]; Seidensticker, Raymond G ^[4]

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1. Penn Hills, PA
2. Greentree, PA
3. Monroeville, PA
4. Forest Hills, PA

A lid for a susceptor in which a crystalline material is melted by induction heating to form a pool or melt of molten material from which a dendritic web of essentially a single crystal of the material is pulled through an elongated slot in the lid and the lid has a pair of generally round openings adjacent the ends of the slot and a groove extends between each opening and the end of the slot. The grooves extend from the outboard surface of the lid to adjacent the inboard surface providing a strip contiguous with the inboard surface of the lid to produce generally uniform radiational heat loss across the width of the dendritic web adjacent the inboard surface of the lid to reduce thermal stresses in the web and facilitate the growth of wider webs at a greater withdrawal rate.

• Assignee: Westinghouse Electric Corp. (Pittsburgh, PA)
• Patent Number(s): US 5098287
• Application Number: 07/525,205
• OSTI ID: 868201
• Country of Publication: United States
• Language: English

Related Subjects

/432/
adjacent
contiguous
crystal
crystalline
crystalline material
dendritic
dendritic web
elongated
elongated slot
essentially
extend
extends
facilitate
form
groove
grooves
growth
heat
heat loss
heating
improved
inboard
induction
induction heating
lid
loss
material
melt
melted
molten
molten material
openings
outboard
pair
pool
produce
providing
pulled
radiational
rate
reduce
reduce thermal
single
single crystal
slot
stresses
strip
surface
susceptor
thermal
thermal stress
thermal stresses
uniform
web
web growth
webs
wider
width
withdrawal