LOW PRESSURE INJECTION MOLDING PROCESS FOR NEAR-NET SHAPE, HOT GAS FILTER COMPONENTS

摘要

Advanced, coal-fueled, power generation systems require low cost, high efficiency, and durable hot-gas filtration systems. The requirement of a high surface area-to-volume ratio filter implies non-trivial shapes. Conventional filters are based on a candle design and more recent innovations involve a cross-flow design. COIC has been developing low pressure injection molding (LPIM) for low cost production of complex-shaped ceramic filters and other advanced ceramic components. Through a DOE-funded Phase II STTR, COIC has developed the LPIM technology for the fabrication of high-purity mullite based candles, 30" long, and roughly 4" x 4" x 8" cross flow filters. Highlights of this study are presented here.