摘要:
A disclosed ceramic honeycomb catalyst having an excellent thermal shock resistance in which a carrier is coated on a ceramic honeycomb structural body, has a mean thermal expansion coefficient in a range from 40 to 800 °C of smaller than 0.7x10 -6 /°C. Therefore, it is possible to obtain a ceramic honeycomb catalyst having an excellent thermal shock resistance in which a mechanical strength of a ceramic honeycomb structural body to which a carrier such as γ-alumina is coated is not decreased and the carrier is not peeled off from the ceramic honeycomb structural body.
摘要:
A method of producing a porous ceramic filter, using a cordierite composition including a talc powder component and a silica powder component, such that particles of the talc power component and the silica powder component whose size is not less than 150µm constitute not more than 3% by weight of the cordierite composition, while particles of the talc and silica powder components whose size is not more than 45µm constitute not more than 25% by weight of the cordierite composition. A green body for the porous ceramic honeycomb filter formed of this cordierite composition is fired into the desired porous ceramic honeycomb filter.
摘要:
A honeycomb regenerator is constructed by (a) honeycomb structural bodies (2) arranged in a high temperature portion, in which a temperature is over 1250°C during a normal operation, made of aluminum-titanate or a combination of aluminum-titanate and mullite, and (b) honeycomb structural bodies (2) arranged in a low temperature portion, made of cordierite and/or mullite, or by (a) honeycomb structural bodies arranged in a high temperature portion, to which an exhaust gas having a high temperature is contacted, made of aluminum-titanate or a combination of aluminum-titanate and mullite, (b) honeycomb structural bodies (2) arranged in a middle temperature portion made of alumina and (c) honeycomb structural bodies (2) arranged in a low temperature portion made of one material or a combination of materials selected from a group of cordierite, mullite and a porcelain. The honeycomb regenerator according to the invention can perform a heat exchanging operation effectively even in an exhaust gas having a high temperature and also in an exhaust gas having a high temperature and a corrosive property.
摘要:
A honeycomb regenerator is constructed by (a) honeycomb structural bodies (2) arranged in a high temperature portion, in which a temperature is over 1250°C during a normal operation, made of aluminum-titanate or a combination of aluminum-titanate and mullite, and (b) honeycomb structural bodies (2) arranged in a low temperature portion, made of cordierite and/or mullite, or by (a) honeycomb structural bodies arranged in a high temperature portion, to which an exhaust gas having a high temperature is contacted, made of aluminum-titanate or a combination of aluminum-titanate and mullite, (b) honeycomb structural bodies (2) arranged in a middle temperature portion made of alumina and (c) honeycomb structural bodies (2) arranged in a low temperature portion made of one material or a combination of materials selected from a group of cordierite, mullite and a porcelain. The honeycomb regenerator according to the invention can perform a heat exchanging operation effectively even in an exhaust gas having a high temperature and also in an exhaust gas having a high temperature and a corrosive property.
摘要:
A method of producing a porous ceramic filter, using a cordierite composition including a talc powder component and a silica powder component, such that particles of the talc power component and the silica powder component whose size is not less than 150µm constitute not more than 3% by weight of the cordierite composition, while particles of the talc and silica powder components whose size is not more than 45µm constitute not more than 25% by weight of the cordierite composition. A green body for the porous ceramic honeycomb filter formed of this cordierite composition is fired into the desired porous ceramic honeycomb filter.
摘要:
A process is disclosed for producing a ceramic structural body, comprising the steps of formulating a ceramic body by incorporating 0.2 to 3 wt% of emulsified wax and 2 to 7 wt% of methyl cellulose and plasticizing the resulting mixture for extrusion, and extruding the ceramic body.