Ceramic honeycomb bodies having high-strength skin and manufacturing methods thereof
US-12060305-B2 · Aug 13, 2024 · US
Ceramic honeycomb structure and its production method
US9890085B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9890085-B2 |
| Application number | US-68055608-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 19, 2008 |
| Priority date | Sep 27, 2007 |
| Publication date | Feb 13, 2018 |
| Grant date | Feb 13, 2018 |
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- Title
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Abstract
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A honeycomb structure having crystal phases of aluminum titanate and mullite, which is obtained by sintering a honeycomb molding made of a mixture comprising titania powder, alumina powder, silica powder and mullite powder, the mixture containing 1-10 parts by mass of silica powder and 5-30 parts by mass of mullite powder per the total amount (100 parts by mass) of the titania powder and the alumina powder, and the mullite powder containing 40-60% by mass of particles having particle sizes of 10-50 gm and 5-30% by mass of particles having particle sizes of 3 gm or less, and its production method.
First claim
Opening claim text (preview).
What is claimed is: 1. A honeycomb structure obtained by sintering a honeycomb molding made of a mixture comprising titania powder, alumina powder, silica powder and mullite powder, said mixture containing 1-10 parts by mass of silica powder and 5-30 parts by mass of mullite powder per the total amount (100 parts by mass) of said titania powder and said alumina powder, and said mullite powder having a maximum particle size of 75 μm or less and containing 40-60% by mass of particles having particle sizes of 10-50 μm and 5-30% by mass of particles having particle sizes of 3 μm or less, wherein the honeycomb structure has main crystal phases of aluminum titanate and mullite, which said aluminum titanate is silica-aluminum titanate solid solution. 2. The honeycomb structure according to claim 1 , wherein said alumina has an average particle size of 0.2-50 μm. 3. The honeycomb structure according to claim 1 , wherein said titania has an average particle size of 0.1-10 μm. 4. A method for producing a honeycomb structure having crystal phases composed of aluminum titanate and mullite, where the aluminum titanate is silica-aluminum titanate solid solution, comprising the step of sintering a honeycomb molding made of a mixture comprising titania powder, alumina powder, silica powder and mullite powder, said mixture containing 1-10 parts by mass of silica powder and 5-30 parts by mass of mullite powder per the total amount (100 parts by mass) of said titania powder and said alumina powder, and said mullite powder having a maximum particle size of 75 μm or less and containing 40-60% by mass of particles having particle sizes of 10-50 μm and 5-30% by mass of particles having particle sizes of 3 μm or less, wherein the honeycomb structure has main crystal phases of aluminum titanate and mullite, which said aluminum titanate is silica-aluminum titanate solid solution. 5. The honeycomb structure according to claim 2 , wherein said titania has an average size of 0.1-10 μm. 6. The honeycomb structure according to claim 1 , wherein said silica is partially dissolved in the crystalline aluminum titanate during sintering.
Assignees
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Classifications
micrometer sized, i.e. from 1 to 100 micron · CPC title
Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint · CPC title
- C04B35/478Primary
based on aluminium titanates · CPC title
as filters or diaphragms · CPC title
Bimodal, multi-modal or multi-fraction · CPC title
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- What does patent US9890085B2 cover?
- A honeycomb structure having crystal phases of aluminum titanate and mullite, which is obtained by sintering a honeycomb molding made of a mixture comprising titania powder, alumina powder, silica powder and mullite powder, the mixture containing 1-10 parts by mass of silica powder and 5-30 parts by mass of mullite powder per the total amount (100 parts by mass) of the titania powder and the al…
- Who is the assignee on this patent?
- Suwabe Hirohisa, Yoshida Masaru, Kumagai Tomomasa, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C04B35/478. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).