公开(公告)号：DE102006056390A1

公开(公告)日：2007-12-27

申请号：DE102006056390

申请日：2006-11-29

Applicant: GEN ELECTRIC

Inventor： MORIKAWA YUJI ,  KAWASAKI KAZUO ,  HWANG ,  SCHAEPKENS MARC

IPC: C30B35/00 ,  C30B23/06 ,  C30B25/02

Abstract: A crucible (10) comprises a closed end, an open end, and a length extending from the open end to the close end; a circumference (40, 41, 51) in-between the length extending from the open end to the close end; and an internal surface and an external surface. The crucible comprises >=2 parts, a base (12) and a top (11) joined at the circumference forming a joint. It is provided with a coating layer (comprising pyrolytic boron nitride and pyrolytic graphite) on portion(s) of internal surface or portion of external surface, for fixedly joining the parts by hermetically sealing the joint. An independent claim is included for a method of preparing a unibody crucible from >=2 parts.