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PRODUCTION METHOD FOR A CORDIERITE-TYPE CERAMIC HONEYCOMB STRUCTURE
A method for producing a cordierite-type ceramic honeycomb structure comprises the steps of extruding a moldable material comprising a ceramic material and a pore-forming material constituted by hollow resin particles coated with inorganic powder to form a predetermined green body, and drying and sintering said green body; said moldable material comprising 8 - 16% by mass of said pore-forming material per 100% by mass of said ceramic material; said pore-forming material having a median diameter D50 of 25 - 35 µm, a particle diameter D10 of 14 - 24 µm, and a particle diameter D90 of 45 - 60 µm, in a curve expressing the relation of a particle diameter to a cumulative volume, a particle diameter distribution deviation SD [= log(D80) - log(D20)] being 0.4 or less, wherein D20 is a particle diameter at a cumulative volume corresponding to 20% of the total volume, and D80 is a particle diameter at a cumulative volume corresponding to 80% of the total volume, D20 < D80; and said pore-forming material having the maximum compression recovery Lmax of 3.0 mm or more, and a compression recovery L in a compression stress range of 2 - 6 MPa, which is 80% or more of said maximum compression recovery Lmax, the compression recovery L being defined by the returning distance (mm) of a piston having an outer diameter of 8 mm applying a predetermined compression stress to 0.3 g of a pore-forming material in a metal cylinder having an inner diameter of 8 mm and a depth of 100 mm, when the pore-forming material is relieved of the compression stress, and the maximum compression recovery Lmax being the maximum of the compression recovery L.
PRODUCTION METHOD FOR A CORDIERITE-TYPE CERAMIC HONEYCOMB STRUCTURE
A method for producing a cordierite-type ceramic honeycomb structure comprises the steps of extruding a moldable material comprising a ceramic material and a pore-forming material constituted by hollow resin particles coated with inorganic powder to form a predetermined green body, and drying and sintering said green body; said moldable material comprising 8 - 16% by mass of said pore-forming material per 100% by mass of said ceramic material; said pore-forming material having a median diameter D50 of 25 - 35 µm, a particle diameter D10 of 14 - 24 µm, and a particle diameter D90 of 45 - 60 µm, in a curve expressing the relation of a particle diameter to a cumulative volume, a particle diameter distribution deviation SD [= log(D80) - log(D20)] being 0.4 or less, wherein D20 is a particle diameter at a cumulative volume corresponding to 20% of the total volume, and D80 is a particle diameter at a cumulative volume corresponding to 80% of the total volume, D20 < D80; and said pore-forming material having the maximum compression recovery Lmax of 3.0 mm or more, and a compression recovery L in a compression stress range of 2 - 6 MPa, which is 80% or more of said maximum compression recovery Lmax, the compression recovery L being defined by the returning distance (mm) of a piston having an outer diameter of 8 mm applying a predetermined compression stress to 0.3 g of a pore-forming material in a metal cylinder having an inner diameter of 8 mm and a depth of 100 mm, when the pore-forming material is relieved of the compression stress, and the maximum compression recovery Lmax being the maximum of the compression recovery L.
PRODUCTION METHOD FOR A CORDIERITE-TYPE CERAMIC HONEYCOMB STRUCTURE
HERSTELLUNGSVERFAHREN FÜR CORDIERIT-KERAMIK-WABENSTRUKTUR
PROCEDE DE PRODUCTION D'UNE STRUCTURE EN NID D'ABEILLE EN CERAMIQUE DE TYPE CORDIERITE
OKAZAKI SHUNJI (author)
2024-02-07
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
/
B01D
SEPARATION
,
Trennen
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
B28B
Formgeben von Ton oder anderen keramischen Stoffzusammensetzungen, Schlacke oder von Mischungen, die zementartiges Material enthalten, z.B. Putzmörtel
,
SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
/
F01N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
,
Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein
CORDIERITE-TYPE CERAMIC HONEYCOMB STRUCTURE AND ITS PRODUCTION METHOD
| European Patent Office | 2017
Cordierite-type ceramic honeycomb structure and its production method
| European Patent Office | 2017
Cordierite-type ceramic honeycomb structure and its production method
| European Patent Office | 2017
CORDIERITE-TYPE CERAMIC HONEYCOMB STRUCTURE AND ITS PRODUCTION METHOD
| European Patent Office | 2016