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- W4229901757 abstract "The project is divided into four tasks: silane production, silicon production, process design, and fluid-bed pyrolysis R and D. The purpose of the silane production task is to determine the feasibility and practicality of high-volume, low-cost production of silane (SiH/sub 4/) as an intermediate for obtaining solar-grade silicon metal. The process is based on the synthesis of SiH/sub 4/ by the catalytic disproportionation of chlorosilanes resulting from the reaction of hydrogen, metallurgical silicon, and silicon tetrachloride. The goal is to demonstrate the feasibility of a silane production cost of under $4.00/kg at a production rate of 1000 MT/year. The objective of the silicon production task is to establish the feasibility and cost of manufacturing semi-conductor grade polycrystalline silicon through the pyrolysis of silane (SiH/sub 4/). The silane-to-silicon conversion is to be investigated in a fluid bed reactor and in a free-space reactor. The process design task is to provide JPL with engineering and economic parameters for an experimental unit sized for 25 metric tons of silicon per year and a product-cost estimate for silicon produced on a scale of 1000 metric tons per year. The purpose of fluid-bed pyrolysis task is to explore the feasibility of using electrical capacitive heating to control the fluidized silicon-bed temperature during the heterogeneous decomposition of silane and to further explore the behavior of a fluid bed. These basic studies will form part of the information necessary to assess technical feasibility of the fluid-bed pyrolysis of silane. Status of these tasks are reported. (WHK)" @default.
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- W4229901757 date "1978-01-01" @default.
- W4229901757 modified "2023-09-24" @default.
- W4229901757 title "Feasibility of low-cost, high-volume production of silane and pyrolysis of silane to semiconductor-grade silicon. Low cost silicon solar array project. Quarterly progress report for July--September 1978" @default.
- W4229901757 doi "https://doi.org/10.2172/6035381" @default.
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