Non-contaminating bonding material for segmented silicon carbide liner in a fluidized bed reactor
AssigneeREC Silicon Inc
InventorsSefa Yilmaz, Matthew J. Miller, Michael V. Spangler, Barry Wemp, Stein Julsrud
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Abstract
Segmented silicon carbide liners for use in a fluidized bed reactor for production of polysilicon-coated granulate material are disclosed, as well as methods of making and using the segmented silicon carbide liners. Non-contaminating bonding materials for joining silicon carbide segments also are disclosed. One or more of the silicon carbide segments may be constructed of reaction-bonded silicon carbide.
Claims20
A process for constructing a liner for a fluidized bed reactor for production of polysilicon-coated granulate material, comprising:
- forming at least one coated edge surface by applying a bonding material comprising a lithium salt to at least a portion of an edge surface of a first silicon carbide segment;
- bringing the at least a portion of the edge surface of the first silicon carbide segment into abutment with at least a portion of an edge surface of a second silicon carbide segment with at least a portion of the bonding material positioned between the abutting edge surfaces of the first silicon carbide segment and the second silicon carbide segment;
- and
- applying heat to the bonding material, in an atmosphere devoid of hydrocarbons, to form bonded first and second silicon carbide segments.
A silicon carbide liner for use in a fluidized bed reactor for production of polysilicon-coated granulate material, the liner comprising:
- a first silicon carbide segment;
- a second silicon carbide segment abutted to the first silicon carbide segment 82;
- and
- a bonding material positioned between abutting edge surfaces of the first and second silicon carbide segments, the bonding material comprising 0.4-0.7 wt % lithium as lithium aluminum silicate and silicon carbide.
Dependencies are inferred from the claim text.