| 摘要 |
<p>Apparatus for filtering solid particulates from suspension in fluid streams (especially carbon particulates from exhaust gas of diesel engines) comprising a honeycomb filter with thin porous walls defining cells extending therethrough, with the transverse cross-sectional shapes of the cells forming a repeating pattern of geometric shapes without corner angles of less than 30 DEG and with alternate cells forming an inlet group and an outlet group. The inlet group is open at the inlet face and closed adjacent the outlet face. The outlet group is closed adjacent the inlet face and open at the outlet face. Each cell of each group shares cell walls only with cells of the other group. The walls may have a volume of substantially uniform interconnected open porosity. Further described are impervious, unglazed, sintered ceramic products of primarily cordierite crystal phase, exhibiting low coefficient of thermal expansion and having analytical molar composition of about 1.7-2.4 RO . 1.9-2.4 Al2O3 . 4.5-5.2 SiO2, as well as a foamable particulate cement capable of forming sintered cordierite foamed ceramic masses, consisting essentially, by weight, of 1-40% cordierite grog, 99-60% ceramic base material and foaming agent, such as SiC, useful as materials for the apparatus.</p> |
