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.

Abstract: Embodiments of a probe assembly for a fluid bed reactor are disclosed. The probe assembly includes a fluid bed reactor (FBR) member, and a pressure tap comprising a wall defining a passageway within which the FBR member is located. Exemplary FBR members include, but are not limited to, a thermocouple, a seed pipe, a particle sampling line, a gas sampling line, a gas feed line, a heater, a second pressure tap, or a combination thereof. Disclosed embodiments of the probe assembly reduce or eliminate the need for support rods and rings within the fluid bed reactor, reduce component fouling within the reactor, and/or reduce product contamination.

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.

Abstract: Embodiments of an obstructing member and methods for its use in a fluidized bed reactor are disclosed. The obstructing member comprises a plurality of receiving members, each receiving member comprising a tubular wall defining a passageway dimensioned to receive an internal reactor component, and a plurality of connecting elements connecting the receiving members, wherein the obstructing member occupies from 15-60% of a horizontal cross-section of a reaction chamber of the fluidized bed reactor.

Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer shell, an insulation layer inwardly of the outer shell, a concentric inner shell inwardly of the outer shell, and a concentric liner that is positioned inwardly of the inner shell and that defines a reactor chamber. The inner shell and liner are sealed together at their bottoms by an O-ring seal arrangement to prevent gas in the reactor chamber from entering a space between the inner shell and the liner. A central inlet nozzle produces a vertical gas plume in the reactor chamber.

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.

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.

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.

Abstract: Embodiments of an obstructing member and methods for its use in a fluidized bed reactor are disclosed. The obstructing member comprises a plurality of receiving members, each receiving member comprising a tubular wall defining a passageway dimensioned to receive an internal reactor component, and a plurality of connecting elements connecting the receiving members, wherein the obstructing member occupies from 15-60% of a horizontal cross-section of a reaction chamber of the fluidized bed reactor.

Abstract: Transition support rings for joining tubular segments of different inner cross-sectional dimensions to make segmented liners for use in a fluidized bed reactor (FBR) for making polysilicon-coated granulate material are disclosed. Segmented liners comprising the transition support rings and fluidized bed reactors including segmented liners are also disclosed.

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.

Abstract: A method and fluidized bed reactor for reducing or eliminating contamination of silicon-coated particles are disclosed. The metal surface of one or more fluidized bed reactor components is at least partially coated with a hard protective layer comprising a material having an ultimate tensile strength of at least 700 MPa at 650° C.

Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer wall, an insulation layer inwardly of the outer wall, at least one heater positioned inwardly of the insulation layer, a removable concentric liner inwardly of the heater, a central inlet nozzle, a plurality of fluidization nozzles, at least one cooling gas nozzle, and at least one product outlet. The system may include a removable concentric sleeve inwardly of the liner. In particular systems the central inlet nozzle is configured to produce a primary gas vertical plume centrally in the reactor chamber to minimize silicon deposition on reactor surfaces.

Abstract: A method and fluidized bed reactor for reducing or eliminating contamination of silicon-coated particles are disclosed. The metal surface of one or more fluidized bed reactor components is at least partially coated with a hard protective layer comprising a material having an ultimate tensile strength of at least 700 MPa at 650° C.

Abstract: Silicon granules are produced by chemical vapor deposition on seed particles inside a chamber within a fluidized bed reactor. The chamber contains an obstructing member, or bubble breaker, which is sized and shaped to restrict the growth of bubbles inside the chamber and which has interior passageways through which a heated fluid passes to transfer heat to gas inside the chamber.

Abstract: Embodiments of an outlet tube assembly for use with a dispensing vessel are disclosed. The dispensing vessel has a side wall defining a chamber; the side wall has an upper portion and has a lower portion that tapers downwardly to an outlet. The outlet tube assembly facilitates accurate measurement of a particulate material level within the dispensing vessel and/or reduces contamination of the particulate material.

Abstract: Embodiments of a reaction chamber liner for use in a heated silicon deposition reactor are disclosed. The liner has an upper portion, a mid portion comprising a material other than a stainless steel alloy, and a lower portion comprising a martensitic stainless steel alloy. The liner's upper portion may have a composition substantially similar to the lower portion.

Abstract: Embodiments of a probe assembly for a fluid bed reactor are disclosed. The probe assembly includes a fluid bed reactor (FBR) member, and a pressure tap comprising a wall defining a passageway within which the FBR member is located. Exemplary FBR members include, but are not limited to, a thermocouple, a seed pipe, a particle sampling line, a gas sampling line, a gas feed line, a heater, a second pressure tap, or a combination thereof. Disclosed embodiments of the probe assembly reduce or eliminate the need for support rods and rings within the fluid bed reactor, reduce component fouling within the reactor, and/or reduce product contamination.

Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer wall, an insulation layer inwardly of the outer wall, at least one heater positioned inwardly of the insulation layer, a removable concentric liner inwardly of the heater, a central inlet nozzle, a plurality of fluidization nozzles, at least one cooling gas nozzle, and at least one product outlet. The system may include a removable concentric sleeve inwardly of the liner. In particular systems the central inlet nozzle is configured to produce a primary gas vertical plume centrally in the reactor chamber to minimize silicon deposition on reactor surfaces.

Abstract: Fluidized bed reactor systems for producing high purity silicon-coated particles are disclosed. A vessel has an outer wall, an insulation layer inwardly of the outer wall, at least one heater positioned inwardly of the insulation layer, a removable concentric liner inwardly of the heater, a central inlet nozzle, a plurality of fluidization nozzles, at least one cooling gas nozzle, and at least one product outlet. The system may include a removable concentric sleeve inwardly of the liner. In particular systems the central inlet nozzle is configured to produce a primary gas vertical plume centrally in the reactor chamber to minimize silicon deposition on reactor surfaces.