A process for producing a honeycomb structure by obtaining clay from a cordierite-forming raw material containing an alumina source, a silica source, and a magnesia source; and forming the clay into a honeycomb shape, wherein a material having, in its volume particle size distribution, a 50 volume %
A process for producing a honeycomb structure by obtaining clay from a cordierite-forming raw material containing an alumina source, a silica source, and a magnesia source; and forming the clay into a honeycomb shape, wherein a material having, in its volume particle size distribution, a 50 volume % particle size (V50) [μm] of 1 to 25 μm is used, as each of alumina source, silica source, and magnesia source; and a material having, in the volume particle size distribution of the whole cordierite-forming raw material, a ratio of 90 volume % particle size (Vall90) [μm] to 10 volume % particle size (Vall10) [μm] [a volume particle size distribution ratio (Vall90/Vall10)] of 10 or less and a difference (Vall90−Vall10) between 90 volume % particle size (Vall90) [μm] and 10 volume % particle size (Vall10) [μm] of 25 μm or less is used, as the cordierite-forming raw material.
대표청구항▼
The invention claimed is: 1. A method for producing a honeycomb structure produced via a step of forming clay obtained from a cordierite-forming raw material which contains an alumina source, a silica source, and a magnesia source into a honeycomb shape, wherein: each of the alumina source, the sil
The invention claimed is: 1. A method for producing a honeycomb structure produced via a step of forming clay obtained from a cordierite-forming raw material which contains an alumina source, a silica source, and a magnesia source into a honeycomb shape, wherein: each of the alumina source, the silica source, and the magnesia source has a 50 volume % particle size of 1 to 25 μm in its volume particle size distribution, and the cordierite-forming raw material has a ratio of 90 volume % particle size to 10 volume % particle size of 10 or less and a difference between 90 volume % particle size and 10 volume % particle size of 25 μm or less in its volume particle size distribution of the cordierite-forming raw material. 2. A process for producing a honeycomb structure according to claim 1, wherein each of the alumina source, the silica source and the magnesia source, includes a material having, in its volume particle size distribution, a 50 volume % particle size of 5 to 20 μm. 3. A process for producing a honeycomb structure according to claim 2, wherein each of the alumina source, the silica source and the magnesia source, includes a material having, in its volume particle size distribution, a 50 volume % particle size of 10 to 20 μm. 4. A process for producing a honeycomb structure according to claim 1, wherein the clay is prepared using no pore former and formed to produce a honeycomb structure. 5. A process for producing a honeycomb structure according to claim 4, which has a porosity of 40% or more.
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이 특허에 인용된 특허 (4)
Readey Michael J. (Denver CO) Rontanini Leonard D. (Broomfield CO), Cordierite material useful in a heat source retainer and process for making the same.
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