EP0172764A2
Expired / Lapsed
EP
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Ceramic sintered body
Assignee: JFE Steel Corp
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Filing: 1985-07-16
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Granted: —
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Expires: 2005-07-16
Abstract
Abstract A ceramic sintered body comprises a first material comprising at least one of precursor and metastable material of the final sintered body and a second material derived from the first material and serving as additive to be added to the first material by 0.1% to 100% on particle number basis. The ceramic sintered body is sintered in a process which comprises the steps of providing a first material which comprises at least one of precursor and metastable material of the final sintered body, adding a second material and sintering mixture of the first and second materials.
Inventors
- 👤 Masato C/O Chiba Works Kumagai
- 👤 Garing L. Messing
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 09:09
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/10; C04B35/622; C04B35/624; C04B35/111; C04B35/46; C04B35/626; C04B35/64
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
50 words
A ceramic sintered body comprising: a first material comprising at least one of precursor and metastable material of the final sintered body; and a second material derived from said first material and serving as additive to be added to said first material by 0.1% to 100% on particle number basis.
Claim 2
Dependent Claim
50 words
A ceramic sintered body comprising: a first material comprising at least one of precursor and metastable material of the final sintered body; and a second material derived from said first material and serving as additive to be added to said first material by 0.1% to 100% on particle number basis.
Claim 3
Dependent Claim
25 words
The ceramic sintered body as set forth in claim 1, wherein said second material is added to said first material before sintering said final body.
Claim 4
Dependent Claim
21 words
The ceramic sintered body as set forth in claim 2, wherein said second material is obtained by heating said first material.
Claim 5
Dependent Claim
22 words
The ceramic sintered body as set forth in claim 3, wherein said first material is boehmite and said second material is a-alumina.
Claim 6
Dependent Claim
25 words
The ceramic sintered body as set forth in claim 4, wherein said a-alumina is added to said boehmite by approximately 3% on particle number basis.
Claim 7
Dependent Claim
22 words
The ceramic sintered body as set forth in claim 3, wherein said first material is anatase and said second material is rutile.
Claim 8
Dependent Claim
25 words
The ceramic sintered body as set forth in claim 6, wherein said rutile is added to said anatase by approximately 3% on particle number basis.
Claim 9
Dependent Claim
57 words
A process for sintering a ceramic body comprising the steps of: providing a first material which comprises at least one of precursor and metastable material of the final sintered body ; adding a second material derived from said first material by 0.1% to 100% on particle number basis; and sintering mixture of said first and second materials.
Claim 10
Dependent Claim
57 words
A process for sintering a ceramic body comprising the steps of: providing a first material which comprises at least one of precursor and metastable material of the final sintered body ; adding a second material derived from said first material by 0.1% to 100% on particle number basis; and sintering mixture of said first and second materials.
Claim 11
Dependent Claim
23 words
The process as set forth in claim 8, which further comprises a step of preparing said second material by heating said first material.
Claim 12
Dependent Claim
20 words
The process as set forth in claim 9, wherein said first material is boehmite and said second material is a-alumina.
Claim 13
Dependent Claim
16 words
The process as set forth in claim 10, wherein said boehmite is provided in gel form.
Claim 14
Dependent Claim
29 words
The process as set forth in claim 10, which further comprises a step for preparing aqueous colloidal dispersion of each of said materials by adjusting PH thereof to 3.
Claim 15
Dependent Claim
23 words
The process as set forth in claim 10, wherein said α-alumina is added to said boehmite by approximately 3% on particle number basis.
Claim 16
Dependent Claim
20 words
The process as set forth in claim 9, wherein said first material is anatase and said second material is rutile.
Claim 17
Dependent Claim
23 words
The process as set forth in claim 14, wherein said rutile is added to said anatase by approximately 3% on particle number basis.
Claim 18
Dependent Claim
29 words
The process as set forth in claim 14, which further comprises a step for preparing aqueous colloidal dispersion of each of said materials by adjusting PH thereof to 3.
References Cited (Backward Citations)
No citation records indexed.
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