Fabrication of porous ceramic from multilayer-coated SiC particles through sol gel followed by in-situ polymerization

通过溶胶凝胶和原位聚合由多层涂覆的 SiC 颗粒制备多孔陶瓷

• 批准号: 417894-2011
• 负责人: Dubois, Charles
• 金额: $ 4.37万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Idea to Innovation
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573485
• 关键词: Fabrication; porous; ceramic; multilayer; coated

Various processes produce dirty gases at high temperature. Accordingly, ceramic filters are used in industrial processes to protect downstream components and environment, and also to save energy. Silicon carbide is commonly applied as a filter material because of its special properties such as high temperature strength and thermal shock resistance. However, based on engineering reports, a major disadvantage of SiC-based filter is its oxidation to SiO2 in high temperature and humid environments. In addition, available methods to fabricate high temperature filter are not capable to control properly the pore size distribution, porosity, and mechanical stability of filer which are the key factors in filtration efficiency. The objective of this project is to develop a new method for fabricating porous SiC ceramics produced by a combined sol-gel and in-situ polymerization approach. This method can fabricate a porous ceramic which is strongly resistant to oxidation and with the properties of a proper filter. The specific objectives involve controlling the pore size distribution and increasing the mechanical properties as well as porosity of the ceramic porous. The final product will compared with conventional methods currently used in ceramic filter industry. The product can be used in various applications, such as gas solid filtration at high temperature or heat treatment substrates. Preliminary results show that these objectives are very achievable.

各种工艺都会在高温下产生肮脏的气体。因此，陶瓷过滤器用于工业过程中，以保护下游组件和环境，并节省能源。碳化硅由于其特殊的性能，如高温强度和抗热震性，通常用作过滤材料。然而，基于工程报告，SiC基过滤器的主要缺点是其在高温和潮湿环境中氧化成SiO2。此外，现有的高温过滤器的制造方法不能适当地控制过滤器的孔径分布、孔隙率和机械稳定性，而这些是过滤效率的关键因素。 本计画的目的是发展一种结合溶胶-凝胶法与原位聚合法制备多孔SiC陶瓷的新方法。该方法可以制备出具有良好抗氧化性和过滤性能的多孔陶瓷。具体目标包括控制孔径分布和增加多孔陶瓷的机械性能以及孔隙率。将最终产品与目前陶瓷过滤器工业中使用的传统方法进行比较。 该产品可用于各种应用，如高温下的气固过滤或热处理基材。初步结果表明，这些目标是完全可以实现的。