ES281533A1 - Method for producing powdered alpha alumina containing magnesium oxide,and the preparation of high-density translucent alumina ceramic therefrom - Google Patents
Method for producing powdered alpha alumina containing magnesium oxide,and the preparation of high-density translucent alumina ceramic therefromInfo
- Publication number
- ES281533A1 ES281533A1 ES0281533A ES281533A ES281533A1 ES 281533 A1 ES281533 A1 ES 281533A1 ES 0281533 A ES0281533 A ES 0281533A ES 281533 A ES281533 A ES 281533A ES 281533 A1 ES281533 A1 ES 281533A1
- Authority
- ES
- Spain
- Prior art keywords
- al2o3
- therefrom
- preparation
- magnesium oxide
- containing magnesium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Powdered a -Al2O3 containing 0.06 to 1% MgO is prepared by heating a mixture of Al2(SO4)3 and a magnesium salt decomposable to MgO to a temperature up to 1100 DEG C., e.g. 950-1100 DEG C., to drive off volatile components and form powdered g -Al2O3, and further heating to up to 1700 DEG C., e.g. 1200-13- DEG C., to convert g -Al2O3 to a -Al2O3. Commercial mono-clinic Al2(SO4)3.#cH2O (#c is 12-18) may be used, and the magnesium salt may be sulphate, nitrate or carbonate. The mixture of a -Al2O3 and MgO may be formed into translucent alumina ware by crushing to - 18 mesh B.S.S. and pressing at 5 to 50 tons/sq. inch to give a compact of density not less than 35% that of a single alumina crystal. This compact is fired in air at 800-1200 DEG C. for e.g. 1 hour, machined to shape, and fired at 1700-1950 DEG C. in H2 or vacuo to remove air pores.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16222961A | 1961-12-26 | 1961-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES281533A1 true ES281533A1 (en) | 1963-03-16 |
Family
ID=22584726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES0281533A Expired ES281533A1 (en) | 1961-12-26 | 1962-10-13 | Method for producing powdered alpha alumina containing magnesium oxide,and the preparation of high-density translucent alumina ceramic therefrom |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES281533A1 (en) |
| GB (1) | GB1026807A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA931737A (en) * | 1970-01-28 | 1973-08-14 | W.R. Grace And Co. | Doped alumina powder |
-
1962
- 1962-10-13 ES ES0281533A patent/ES281533A1/en not_active Expired
- 1962-12-18 GB GB4775962A patent/GB1026807A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1026807A (en) | 1966-04-20 |
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