Porous SiC-bodies with micro-channels and process for their fabrication,申请号US20050289962-传众专利搜索

Porous SiC-bodies with micro-channels and process for their fabrication

申请公布号：US2006121266(A1)

申请号：US20050289962

申请日期：2005.11.30

申请公布日期：2006.06.08

申请人：

FANDEL MARCO;THIEMANN KARL-HEINZ;WILHELMI CHRISTIAN

发明人：FANDEL MARCO;THIEMANN KARL-HEINZ;WILHELMI CHRISTIAN

分类号：B32B3/12;B28B1/00;B32B3/00;C04B33/32;C04B33/36

主分类号：B32B3/12

摘要：Process for the fabrication of porous bodies mainly constituted by SiC containing ceramic with a microstructure which is interfused with micro-channels which consists of the process steps a) Provision of a pre-body made from cellulose or pulp b) Fabrication of an infiltration solution or a slurry consisting of (A) solvent, polysilazane, polysilane and/or polycarbosilane or (B) solvent, polysilazane and/or polysilane as well as active metallic fillers and/or passive ceramic fillers. c) Infiltrating the body with infiltration solution or slurry d) Cross-linking of the polysilazane, polycarbosilane and/or polysilane while generating a solid green body e) Ceramization through pyrolysis of the green body in an inert-gas atmosphere. f) Removal of residual carbon with an oxidizing thermal process, thereof producible catalyst carriers or carbon particulate filters as well as Porous ceramic which is made from at least 80% SiC in which the porous ceramic features a microstructure with micro-channels consisting mainly of SiC coated micro-channels featuring an average diameter between 1 and 25 mum and webs of SiC located between the micro-channels as well as additional ceramic materials with a content below 20 wt %.