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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Powder Materials for Energy Applications
Presentation Title As-sintered Long Porous Inconel 625 Tubes for Hot Gas Filtration for the Production of High-purity Silicon
Author(s) Qiang Bing Wang , Hui Ping Tang , Ma Qian
On-Site Speaker (Planned) Ma Qian
Abstract Scope High efficiency filtration of hot (up to 400C) gas mixtures of SiHCl3 and HCl is an important step in the production of high-purity silicon for solar cells. This study reports the sintering fabrication of long porous Inconel 625 tubes (diameter: 54 mm; length: 1000 mm) and their commercial applications. Pre-alloyed Inconel 625 powder was used to fabricate such long porous Inconel 625 tubes, shaped by cold isostatic pressing and sintered in a hydrogen atmosphere. The as-sintered porous Inconel 625 tubes were characterised and tested. Then a cluster of 37 as-sintered porous Inconel 625 tubes with dimensions of 1000 mm in length and 54 mm in diameter were installed and used to filter gas mixtures of SiHCl3 and HCl at temperatures up to 400 C for 6 months. The products demonstrated outstanding performance.
Proceedings Inclusion? Planned: Supplemental Proceedings volume


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As-sintered Long Porous Inconel 625 Tubes for Hot Gas Filtration for the Production of High-purity Silicon
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