| 摘要 |
<p>#CMT# #/CMT# The filter has flow channels (1) provided with a coating (6) made of high-melting material. The coating closes pores (5) for soot particles (7) in a wall (4) of a ceramic wall flow filter substrate without penetration of gaseous exhaust gas components. The pores connect flow channels and disperse channels (2) with each other. Particle sizes of the material are adapted to sizes of the pores such that a value of particle sizes distribution of the material is equal to or larger than a value of pores sizes distribution of the substrate. The coating includes a thickness of 10 to 150 micrometers. #CMT#USE : #/CMT# Diesel particle filter for filtering exhaust gas from a diesel engine of a motorvehicle. #CMT#ADVANTAGE : #/CMT# The coating closes the pores for the soot particles in the wall of the ceramic wall flow filter substrate without penetration of the gaseous exhaust gas components, thus providing the filter with improved accumulated pressure properties without lowering efficiency, catalytic properties and soot ignition properties. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of a diesel particle filter. 1 : Flow channels 2 : Disperse channels 4 : Wall 5 : Pores 6 : Coating 7 : Soot particles #CMT#INORGANIC CHEMISTRY : #/CMT# The high-melting material is selected from a group of aluminum oxide, rare-earth metal-stabilized aluminum oxide, rare-earth metal-sesquioxide, titanium dioxide, zirconium oxide, ceramic-zirconium-mixed oxide, vanadium pentoxide, vanadium trioxide, tungsten trioxide, molybdenum trioxide or combinations of oxides.</p> |
