CA1302681C - Ceramic bodies produced from boehmite gels by a hydrothermal process - Google Patents
Ceramic bodies produced from boehmite gels by a hydrothermal processInfo
- Publication number
- CA1302681C CA1302681C CA000574091A CA574091A CA1302681C CA 1302681 C CA1302681 C CA 1302681C CA 000574091 A CA000574091 A CA 000574091A CA 574091 A CA574091 A CA 574091A CA 1302681 C CA1302681 C CA 1302681C
- Authority
- CA
- Canada
- Prior art keywords
- boehmite
- precursor
- alumina
- microcrystalline
- firing
- 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 - Lifetime
Links
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 title claims abstract description 130
- 229910001593 boehmite Inorganic materials 0.000 title claims abstract description 128
- 239000000919 ceramic Substances 0.000 title claims abstract description 13
- 239000000499 gel Substances 0.000 title description 32
- 238000001027 hydrothermal synthesis Methods 0.000 title description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 239000002243 precursor Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 150000001768 cations Chemical class 0.000 claims abstract description 7
- 238000005342 ion exchange Methods 0.000 claims abstract description 6
- 238000010899 nucleation Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 45
- 239000013078 crystal Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 20
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 13
- 150000004684 trihydrates Chemical class 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 9
- 150000002500 ions Chemical class 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002609 medium Substances 0.000 claims description 7
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 230000006911 nucleation Effects 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims 13
- 239000012736 aqueous medium Substances 0.000 claims 12
- 238000007493 shaping process Methods 0.000 claims 3
- 239000003966 growth inhibitor Substances 0.000 claims 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 28
- 239000003054 catalyst Substances 0.000 abstract description 8
- 239000011541 reaction mixture Substances 0.000 abstract description 8
- 238000010335 hydrothermal treatment Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000007858 starting material Substances 0.000 description 12
- 239000002002 slurry Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- -1 aluminum alkoxides Chemical class 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 239000003082 abrasive agent Substances 0.000 description 5
- 229910001679 gibbsite Inorganic materials 0.000 description 5
- 229910017604 nitric acid Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 229910018626 Al(OH) Inorganic materials 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 235000019589 hardness Nutrition 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- ZZBAGJPKGRJIJH-UHFFFAOYSA-N 7h-purine-2-carbaldehyde Chemical compound O=CC1=NC=C2NC=NC2=N1 ZZBAGJPKGRJIJH-UHFFFAOYSA-N 0.000 description 3
- 229910002706 AlOOH Inorganic materials 0.000 description 3
- 241000640882 Condea Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 150000004682 monohydrates Chemical class 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910001415 sodium ion Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000003377 acid catalyst Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 238000007171 acid catalysis Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007863 gel particle Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
- B01J21/04—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/008—Abrasive bodies without external bonding agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/447—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by wet processes
- C01F7/448—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by wet processes using superatmospheric pressure, e.g. hydrothermal conversion of gibbsite into boehmite
-
- 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
- C04B35/111—Fine ceramics
-
- 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
- C04B35/111—Fine ceramics
- C04B35/1115—Minute sintered entities, e.g. sintered abrasive grains or shaped particles such as platelets
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Compositions Of Oxide Ceramics (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8454987A | 1987-08-11 | 1987-08-11 | |
| US084,549 | 1987-08-11 | ||
| US07/133,584 US4797139A (en) | 1987-08-11 | 1987-12-16 | Boehmite produced by a seeded hydyothermal process and ceramic bodies produced therefrom |
| US133,584 | 1987-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1302681C true CA1302681C (en) | 1992-06-09 |
Family
ID=26771116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000574091A Expired - Lifetime CA1302681C (en) | 1987-08-11 | 1988-08-08 | Ceramic bodies produced from boehmite gels by a hydrothermal process |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4797139A (instruction) |
| EP (1) | EP0304721B1 (instruction) |
| JP (1) | JPH0761861B2 (instruction) |
| KR (1) | KR960002622B1 (instruction) |
| AU (1) | AU595463B2 (instruction) |
| BR (1) | BR8804056A (instruction) |
| CA (1) | CA1302681C (instruction) |
| DE (1) | DE3879584T2 (instruction) |
| DK (1) | DK172756B1 (instruction) |
| IN (1) | IN170641B (instruction) |
| MX (1) | MX164999B (instruction) |
| NO (1) | NO176513C (instruction) |
| NZ (1) | NZ225586A (instruction) |
Families Citing this family (109)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5445807A (en) * | 1983-09-22 | 1995-08-29 | Aluminum Company Of America | Production of aluminum compound |
| US4964883A (en) * | 1988-12-12 | 1990-10-23 | Minnesota Mining And Manufacturing Company | Ceramic alumina abrasive grains seeded with iron oxide |
| DE58903831D1 (de) * | 1989-04-17 | 1993-04-22 | Starck H C Gmbh Co Kg | Verfahren zur herstellung von alpha-a1203-sinterkoerpern. |
| EP0394501B1 (de) * | 1989-04-17 | 1992-10-07 | H.C. Starck GmbH & Co. KG | Verfahren zur Herstellung von alpha-A1203-Sinterkörpern |
| US5139978A (en) * | 1990-07-16 | 1992-08-18 | Minnesota Mining And Manufacturing Company | Impregnation method for transformation of transition alumina to a alpha alumina |
| US5219806A (en) * | 1990-07-16 | 1993-06-15 | Minnesota Mining And Manufacturing Company | Alpha phase seeding of transition alumina using chromium oxide-based nucleating agents |
| US5178849A (en) * | 1991-03-22 | 1993-01-12 | Norton Company | Process for manufacturing alpha alumina from dispersible boehmite |
| US5569325A (en) * | 1991-04-22 | 1996-10-29 | Condea Vista Company | Process for growing crystals |
| ATE139514T1 (de) * | 1991-04-26 | 1996-07-15 | Vista Chemical | Verfahren zur herstellung von submikronischen aluminateilchen |
| US5641469A (en) * | 1991-05-28 | 1997-06-24 | Norton Company | Production of alpha alumina |
| JP2887023B2 (ja) * | 1992-03-30 | 1999-04-26 | ワイケイケイ株式会社 | 微細板状ベーマイト粒子及びその製造方法 |
| KR960700194A (ko) * | 1993-11-25 | 1996-01-19 | 고사이 아키오 | α-알루미나 분말의 제조방법(Process for producing α-alumina powder) |
| JP3755826B2 (ja) * | 1993-12-09 | 2006-03-15 | 触媒化成工業株式会社 | アルミナの製造方法と装置 |
| US5372620A (en) * | 1993-12-13 | 1994-12-13 | Saint Gobain/Norton Industrial Ceramics Corporation | Modified sol-gel alumina abrasive filaments |
| AU699077B2 (en) * | 1995-02-21 | 1998-11-19 | Sumitomo Chemical Company, Limited | Alpha-alumina and method for producing the same |
| US5593468A (en) * | 1995-07-26 | 1997-01-14 | Saint-Gobain/Norton Industrial Ceramics Corporation | Sol-gel alumina abrasives |
| DE69634164T2 (de) * | 1995-08-24 | 2005-12-22 | Kinsei Matec Co., Ltd., Osaka | Aluminiumoxydteilchen mit erhöhter Dispergierbarkeit und Plastizität und Verfahren zu ihrer Herstellung |
| US5989515A (en) * | 1996-07-24 | 1999-11-23 | Nissan Chemical Industries, Ltd. | Process for producing an acidic aqueous alumina sol |
| DE19836821A1 (de) * | 1998-08-14 | 2000-02-24 | Rwe Dea Ag | Böhmitische Tonerden und aus diesen erhältliche phasenreine, hochtemperaturstabile und hochporöse Aluminiumoxide |
| JP4204132B2 (ja) * | 1999-02-19 | 2009-01-07 | 大塚化学ホールディングス株式会社 | 摩擦材 |
| DE19930924A1 (de) * | 1999-07-06 | 2001-01-18 | Rwe Dea Ag | Verfahren zur Herstellung von Tonerdehydraten durch Fällung von Aluminiumsalzen in Gegenwart von Kristallisationskeimen |
| US7208446B2 (en) * | 1999-08-11 | 2007-04-24 | Albemarle Netherlands B. V. | Quasi-crystalline boehmites containing additives |
| US20030180214A1 (en) * | 1999-08-11 | 2003-09-25 | Dennis Stamires | Process for the preparation of quasi-crystalline boehmites |
| BR0013133B1 (pt) † | 1999-08-11 | 2013-10-29 | Processo para a preparação de boemita quase cristalina | |
| BR0013136A (pt) | 1999-08-11 | 2002-04-30 | Akzo Nobel Nv | Boehmita quase-cristalina, processo para a preparação da mesma, partìcula moldada, composição de catalisador, e, alumina de transição |
| BR0013131B1 (pt) * | 1999-08-11 | 2010-05-04 | "processo para a preparação de boehmita microcristalina contendo um adtivo homogeneamente dispersado". | |
| DE60015345T2 (de) | 1999-08-11 | 2005-10-20 | Albemarle Netherlands B.V. | Verfahren zur herstellung von quasi-kristallinen boehmiten |
| US6287353B1 (en) | 1999-09-28 | 2001-09-11 | 3M Innovative Properties Company | Abrasive grain, abrasive articles, and methods of making and using the same |
| US6277161B1 (en) | 1999-09-28 | 2001-08-21 | 3M Innovative Properties Company | Abrasive grain, abrasive articles, and methods of making and using the same |
| US6403526B1 (en) | 1999-12-21 | 2002-06-11 | W. R. Grace & Co.-Conn. | Alumina trihydrate derived high pore volume, high surface area aluminum oxide composites and methods of their preparation and use |
| SK287685B6 (sk) * | 1999-12-21 | 2011-06-06 | W.R. Grace & Co.-Conn. | Trihydrát oxidu hlinitého s veľkým objemom pórov, kompozitné materiály z oxidu hlinitého s veľkou plochou povrchu, spôsoby ich prípravy a použitie |
| JP4909497B2 (ja) * | 2001-05-10 | 2012-04-04 | アルベマーレ ネザーランズ ビー．ブイ． | 無機固体粒子の効率的な転化のための連続プロセス及び装置 |
| US20050250642A1 (en) * | 2001-05-10 | 2005-11-10 | Dennis Stamires | Continuous process and apparatus for the efficient conversion of inorganic solid particles |
| WO2003014251A1 (en) * | 2001-08-09 | 2003-02-20 | Hitachi Maxell, Ltd. | Non-magnetic particles having a plate shape and method for production thereof, abrasive material, polishing article and abrasive fluid comprising such particles |
| US20050124745A1 (en) * | 2002-04-19 | 2005-06-09 | Saint-Gobain Ceramics & Plastics, Inc. | Flame retardant composites |
| CA2481475C (en) * | 2002-04-19 | 2009-07-14 | Saint-Gobain Ceramics & Plastics, Inc. | Novel boehmite particles and polymer materials incorporating same |
| US7582277B2 (en) | 2002-04-19 | 2009-09-01 | Saint-Gobain Ceramics & Plastics, Inc. | Seeded boehmite particulate material and methods for forming same |
| US20040265219A1 (en) * | 2002-04-19 | 2004-12-30 | Saint-Gobain Ceramics & Plastics, Inc. | Seeded boehmite particulate material and methods for forming same |
| US20050227000A1 (en) * | 2004-04-13 | 2005-10-13 | Saint-Gobain Ceramics & Plastics, Inc. | Surface coating solution |
| US7176160B2 (en) * | 2002-10-16 | 2007-02-13 | Conocophillips Company | Method for forming a Fischer-Tropsch catalyst using a boehmite support |
| US7341976B2 (en) * | 2002-10-16 | 2008-03-11 | Conocophillips Company | Stabilized boehmite-derived catalyst supports, catalysts, methods of making and using |
| US7144599B2 (en) * | 2004-07-15 | 2006-12-05 | Birchwood Laboratories, Inc. | Hybrid metal oxide/organometallic conversion coating for ferrous metals |
| US20060104895A1 (en) * | 2004-11-18 | 2006-05-18 | Saint-Gobain Ceramics & Plastics, Inc. | Transitional alumina particulate materials having controlled morphology and processing for forming same |
| TWI290944B (en) * | 2004-12-01 | 2007-12-11 | Saint Gobain Ceramics | Rubber formulation and methods for manufacturing same |
| US8685123B2 (en) * | 2005-10-14 | 2014-04-01 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive particulate material, and method of planarizing a workpiece using the abrasive particulate material |
| US7479324B2 (en) * | 2005-11-08 | 2009-01-20 | Saint-Gobain Ceramics & Plastics, Inc. | Pigments comprising alumina hydrate and a dye, and polymer composites formed thereof |
| DE102006012268A1 (de) | 2006-03-15 | 2007-09-27 | Nabaltec Ag | Feinkristalliner Böhmit und Verfahren zu dessen Herstellung |
| CA2670413C (en) | 2006-12-06 | 2012-06-05 | Saint-Gobain Ceramics & Plastics, Inc. | Treated alumina hydrate material and uses thereof |
| CA2670406C (en) * | 2006-12-06 | 2012-10-02 | Saint-Gobain Ceramics & Plastics, Inc. | Treated alumina hydrate material and uses thereof |
| BRPI0812611A2 (pt) * | 2007-07-13 | 2015-03-31 | Alcoa Australia | "método para o controle da precipitação de alumina de uma solução do processo bayer" |
| EP2209842A1 (en) * | 2007-10-19 | 2010-07-28 | Saint-Gobain Ceramics & Plastics, Inc. | Applications of shaped nano alumina hydrate as barrier property enhancer in polymers |
| EP2231523A2 (en) * | 2007-12-19 | 2010-09-29 | Saint-Gobain Ceramics & Plastics, Inc. | Aggregates of alumina hydrates |
| KR20100138880A (ko) * | 2008-02-19 | 2010-12-31 | 알베마를 유럽 에스피알엘 | 나노분산성 보에마이트의 제조방법 및 이로부터 제조된 나노분산성 보에마이트의 난연성 합성 수지에서의 용도 |
| JP5530672B2 (ja) * | 2008-08-18 | 2014-06-25 | 株式会社フジミインコーポレーテッド | ベーマイト粒子の製造方法及びアルミナ粒子の製造方法 |
| WO2010077779A2 (en) * | 2008-12-17 | 2010-07-08 | Saint-Gobain Ceramics & Plastics, Inc. | Applications of shaped nano alumina hydrate in inkjet paper |
| US8758461B2 (en) | 2010-12-31 | 2014-06-24 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive particles having particular shapes and methods of forming such particles |
| CN108262695A (zh) | 2011-06-30 | 2018-07-10 | 圣戈本陶瓷及塑料股份有限公司 | 包括氮化硅磨粒的磨料制品 |
| CN103764349B (zh) | 2011-06-30 | 2017-06-09 | 圣戈本陶瓷及塑料股份有限公司 | 液相烧结碳化硅研磨颗粒 |
| CA2850147A1 (en) | 2011-09-26 | 2013-04-04 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive articles including abrasive particulate materials, coated abrasives using the abrasive particulate materials and methods of forming |
| KR101736755B1 (ko) | 2011-12-30 | 2017-05-17 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | 복합 형상화 연마입자들 및 이의 형성방법 |
| CA2862453A1 (en) | 2011-12-30 | 2013-07-04 | Saint-Gobain Ceramics & Plastics, Inc. | Forming shaped abrasive particles |
| EP3517245B1 (en) | 2011-12-30 | 2023-12-13 | Saint-Gobain Ceramics & Plastics Inc. | Shaped abrasive particle and method of forming same |
| WO2013106602A1 (en) | 2012-01-10 | 2013-07-18 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive particles having particular shapes and methods of forming such particles |
| CA2987793C (en) | 2012-01-10 | 2019-11-05 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive particles having complex shapes and methods of forming same |
| WO2013149209A1 (en) | 2012-03-30 | 2013-10-03 | Saint-Gobain Abrasives, Inc. | Abrasive products having fibrillated fibers |
| KR102534897B1 (ko) | 2012-05-23 | 2023-05-30 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | 형상화 연마입자들 및 이의 형성방법 |
| KR20150023034A (ko) | 2012-06-29 | 2015-03-04 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | 특정 형상을 가지는 연마입자들 및 이러한 입자들 형성방법 |
| KR101736085B1 (ko) | 2012-10-15 | 2017-05-16 | 생-고뱅 어브레이시브즈, 인코포레이티드 | 특정한 형태들을 가진 연마 입자들 및 이러한 입자들을 형성하는 방법들 |
| KR101818946B1 (ko) | 2012-12-31 | 2018-01-17 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | 미립자 소재 및 이의 형성방법 |
| TWI666310B (zh) | 2013-03-15 | 2019-07-21 | Advanced Refining Technologies Llc | 觸媒組成物、加氫處理重烴類部分之方法及製備沉澱氧化鋁組成物的方法 |
| MX378491B (es) | 2013-03-29 | 2025-03-11 | Saint Gobain Abrasives Inc | Particulas abrasivas con formas particulares y metodos para elaborar las particulas. |
| TW201502263A (zh) | 2013-06-28 | 2015-01-16 | Saint Gobain Ceramics | 包含成形研磨粒子之研磨物品 |
| CN110591645A (zh) | 2013-09-30 | 2019-12-20 | 圣戈本陶瓷及塑料股份有限公司 | 成形磨粒及其形成方法 |
| CA2934938C (en) | 2013-12-31 | 2019-04-30 | Saint-Gobain Abrasives, Inc. | Abrasive article including shaped abrasive particles |
| US9771507B2 (en) | 2014-01-31 | 2017-09-26 | Saint-Gobain Ceramics & Plastics, Inc. | Shaped abrasive particle including dopant material and method of forming same |
| US10557067B2 (en) | 2014-04-14 | 2020-02-11 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive article including shaped abrasive particles |
| US9803119B2 (en) | 2014-04-14 | 2017-10-31 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive article including shaped abrasive particles |
| WO2015184355A1 (en) | 2014-05-30 | 2015-12-03 | Saint-Gobain Abrasives, Inc. | Method of using an abrasive article including shaped abrasive particles |
| FR3029909B1 (fr) * | 2014-12-16 | 2017-01-20 | Commissariat Energie Atomique | Procede de preparation d'un substrat en ceramique oxyde mettant en œuvre une resine echangeuse d'ions |
| US9707529B2 (en) | 2014-12-23 | 2017-07-18 | Saint-Gobain Ceramics & Plastics, Inc. | Composite shaped abrasive particles and method of forming same |
| US9914864B2 (en) | 2014-12-23 | 2018-03-13 | Saint-Gobain Ceramics & Plastics, Inc. | Shaped abrasive particles and method of forming same |
| US9676981B2 (en) | 2014-12-24 | 2017-06-13 | Saint-Gobain Ceramics & Plastics, Inc. | Shaped abrasive particle fractions and method of forming same |
| TWI634200B (zh) | 2015-03-31 | 2018-09-01 | 聖高拜磨料有限公司 | 固定磨料物品及其形成方法 |
| US10196551B2 (en) | 2015-03-31 | 2019-02-05 | Saint-Gobain Abrasives, Inc. | Fixed abrasive articles and methods of forming same |
| JP2018516767A (ja) | 2015-06-11 | 2018-06-28 | サン−ゴバン セラミックス アンド プラスティクス，インコーポレイティド | 成形研磨粒子を含む研磨物品 |
| CN109462993A (zh) | 2016-05-10 | 2019-03-12 | 圣戈本陶瓷及塑料股份有限公司 | 磨料颗粒及其形成方法 |
| KR102481559B1 (ko) | 2016-05-10 | 2022-12-28 | 생-고뱅 세라믹스 앤드 플라스틱스, 인코포레이티드 | 연마 입자 및 이의 형성 방법 |
| CN109476493B (zh) | 2016-07-29 | 2021-06-11 | 住友化学株式会社 | 氧化铝和使用其的汽车催化剂的制造方法 |
| US11230653B2 (en) | 2016-09-29 | 2022-01-25 | Saint-Gobain Abrasives, Inc. | Fixed abrasive articles and methods of forming same |
| KR101725799B1 (ko) | 2016-11-04 | 2017-04-11 | 오상자이엘 주식회사 | 고결정 감마-보헤마이트 복합 입자 및 이의 제조 방법 |
| US10759024B2 (en) | 2017-01-31 | 2020-09-01 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive article including shaped abrasive particles |
| US10563105B2 (en) | 2017-01-31 | 2020-02-18 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive article including shaped abrasive particles |
| WO2018236989A1 (en) | 2017-06-21 | 2018-12-27 | Saint-Gobain Ceramics & Plastics, Inc. | Particulate materials and methods of forming same |
| CN107673405A (zh) * | 2017-11-14 | 2018-02-09 | 黄林海 | 一种从二氧化钛生产工艺中的回收氯气的方法 |
| CN110240492B (zh) * | 2018-03-07 | 2020-07-28 | 海加尔(厦门)科技有限公司 | 一种耐酸碱的陶瓷分离膜支撑体的制备方法 |
| US12129422B2 (en) | 2019-12-27 | 2024-10-29 | Saint-Gobain Ceramics & Plastics, Inc. | Abrasive articles and methods of forming same |
| CN114845838B (zh) | 2019-12-27 | 2024-10-25 | 圣戈本陶瓷及塑料股份有限公司 | 磨料制品及其形成方法 |
| CN119238386A (zh) | 2019-12-27 | 2025-01-03 | 圣戈本陶瓷及塑料股份有限公司 | 磨料制品及其形成方法 |
| EP3878816A1 (en) | 2020-03-13 | 2021-09-15 | Almatis GmbH | Method for preparing high purity aluminum monohydrate and alpha alumina |
| CN111470523A (zh) * | 2020-05-07 | 2020-07-31 | 郑州中科新兴产业技术研究院 | 一种水分散薄水铝石纳米片的无模板分级生长制备方法 |
| KR102612361B1 (ko) * | 2020-10-07 | 2023-12-08 | 주식회사 티세라 | α-알루미나 입자를 포함하는 연마재 및 그 제조 방법 |
| WO2023130053A1 (en) | 2021-12-30 | 2023-07-06 | Saint-Gobain Abrasives, Inc. | Abrasive articles and methods of forming same |
| CN114772621B (zh) * | 2022-03-25 | 2023-06-20 | 安徽壹石通材料科技股份有限公司 | 一种棒状勃姆石粉体的制备方法 |
| CN114772615A (zh) * | 2022-04-24 | 2022-07-22 | 郑州原发精细微粉材料技术有限公司 | 一种重质菱形勃姆石的生产方法 |
| CN115245798B (zh) * | 2022-07-20 | 2024-08-16 | 山东大学 | 一种γ-AlOOH溶胶及其制备方法与应用 |
| CN115231599B (zh) * | 2022-09-02 | 2023-08-01 | 安徽壹石通材料科技股份有限公司 | 一种粒度可控的勃姆石制备方法 |
| CN115466107B (zh) * | 2022-11-14 | 2023-06-30 | 湖南圣瓷科技有限公司 | 一种具有粗晶-细晶复合显微结构特征的氧化铝陶瓷及其应用 |
| CN118439638B (zh) * | 2024-07-04 | 2024-09-03 | 湖南荣岚智能科技有限公司 | 一种具有定向纳米结构的氧化铝气凝胶及其制备方法 |
| CN118955100B (zh) * | 2024-10-16 | 2024-12-27 | 长沙鑫本助剂有限公司 | 用于去除特种玻璃强化剂中锂离子的陶瓷膜及其制备方法与去除方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615306A (en) * | 1967-10-12 | 1971-10-26 | Norton Co | A method for producing alpha-alumina crystals from aluminum oxide |
| FR2450232A1 (fr) * | 1979-02-28 | 1980-09-26 | Pechiney Aluminium | Procede de transformation de l'hydrargilitte en boehmite |
| US4314827A (en) * | 1979-06-29 | 1982-02-09 | Minnesota Mining And Manufacturing Company | Non-fused aluminum oxide-based abrasive mineral |
| US4297325A (en) * | 1980-12-08 | 1981-10-27 | Filtrol Corporation | Method of producing pseudoboehmite from aluminum salt solutions |
| US4543107A (en) * | 1984-08-08 | 1985-09-24 | Norton Company | Vitrified bonded grinding wheels containing sintered gel aluminous abrasive grits |
| US4623364A (en) * | 1984-03-23 | 1986-11-18 | Norton Company | Abrasive material and method for preparing the same |
| NZ210805A (en) * | 1984-01-19 | 1988-04-29 | Norton Co | Aluminous abrasive grits or shaped bodies |
| US4574003A (en) * | 1984-05-03 | 1986-03-04 | Minnesota Mining And Manufacturing Co. | Process for improved densification of sol-gel produced alumina-based ceramics |
| CA1254238A (en) * | 1985-04-30 | 1989-05-16 | Alvin P. Gerk | Process for durable sol-gel produced alumina-based ceramics, abrasive grain and abrasive products |
| US4657754A (en) * | 1985-11-21 | 1987-04-14 | Norton Company | Aluminum oxide powders and process |
-
1987
- 1987-12-16 US US07/133,584 patent/US4797139A/en not_active Expired - Lifetime
-
1988
- 1988-07-27 NZ NZ225586A patent/NZ225586A/en unknown
- 1988-08-01 IN IN639/CAL/88A patent/IN170641B/en unknown
- 1988-08-02 MX MX12516A patent/MX164999B/es unknown
- 1988-08-04 AU AU20452/88A patent/AU595463B2/en not_active Expired
- 1988-08-08 CA CA000574091A patent/CA1302681C/en not_active Expired - Lifetime
- 1988-08-09 DE DE8888112945T patent/DE3879584T2/de not_active Expired - Lifetime
- 1988-08-09 EP EP88112945A patent/EP0304721B1/en not_active Expired - Lifetime
- 1988-08-09 NO NO883535A patent/NO176513C/no not_active IP Right Cessation
- 1988-08-10 JP JP63198102A patent/JPH0761861B2/ja not_active Expired - Lifetime
- 1988-08-10 DK DK198804471A patent/DK172756B1/da not_active IP Right Cessation
- 1988-08-10 KR KR1019880010204A patent/KR960002622B1/ko not_active Expired - Lifetime
- 1988-08-11 BR BR8804056A patent/BR8804056A/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0761861B2 (ja) | 1995-07-05 |
| DK447188A (da) | 1989-02-12 |
| EP0304721B1 (en) | 1993-03-24 |
| NZ225586A (en) | 1991-07-26 |
| NO883535L (no) | 1989-02-13 |
| IN170641B (instruction) | 1992-04-25 |
| DE3879584D1 (de) | 1993-04-29 |
| NO176513C (no) | 1995-04-19 |
| DK172756B1 (da) | 1999-06-28 |
| NO176513B (no) | 1995-01-09 |
| JPS6469511A (en) | 1989-03-15 |
| AU595463B2 (en) | 1990-03-29 |
| KR960002622B1 (ko) | 1996-02-24 |
| BR8804056A (pt) | 1989-05-02 |
| US4797139A (en) | 1989-01-10 |
| DK447188D0 (da) | 1988-08-10 |
| DE3879584T2 (de) | 1993-09-23 |
| KR890003623A (ko) | 1989-04-15 |
| MX164999B (es) | 1992-10-13 |
| NO883535D0 (no) | 1988-08-09 |
| AU2045288A (en) | 1989-02-16 |
| EP0304721A1 (en) | 1989-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1302681C (en) | Ceramic bodies produced from boehmite gels by a hydrothermal process | |
| US4744802A (en) | Process for durable sol-gel produced alumina-based ceramics, abrasive grain and abrasive products | |
| US5383945A (en) | Abrasive material and method | |
| RU2076083C1 (ru) | СПОСОБ ПОЛУЧЕНИЯ СПЕЧЕННОГО МАТЕРИАЛА НА ОСНОВЕ α МОДИФИКАЦИИ ОКСИДА АЛЮМИНИЯ | |
| EP2366665B1 (en) | Nanoporous ultrafine alpha-alumina powders and sol-gel process of preparing the same | |
| US4769351A (en) | Hydrothermal process for preparing zirconia-alumina base ultra-fine powders of high purity | |
| US4605631A (en) | Advanced preparation of ceramic powders | |
| US5032555A (en) | Process for making zirconia-alumina | |
| US4847064A (en) | Economical process for alpha alumina production | |
| CA1267917A (en) | Chemical preparation of zirconium-aluminum-magnesium oxide composites | |
| USH189H (en) | Process for production of alpha alumina bodies by sintering seeded boehmite made from alumina hydrates | |
| JP3759208B2 (ja) | アルミナ粒子の製造方法 | |
| CA2195649C (en) | Magnesium hydroxide slurries | |
| US4374117A (en) | Preparation of ultrafine BaZrO3 | |
| JPH06263437A (ja) | 板状ベーマイト粒子の製造方法 | |
| EP0536381A4 (instruction) | ||
| US5316752A (en) | Process for preparing mixed oxides | |
| RU2257346C1 (ru) | Способ получения мелкокристаллического альфа-оксида алюминия | |
| JPS62153118A (ja) | 易焼結性アルミナ粉末の製造法 | |
| JPH10139424A (ja) | 低温遷移α−アルミナおよびその製造法 | |
| Ramanathan et al. | Sinterable Alumina Powders | |
| EP0414695B1 (en) | Ceramic powder and a process for the preparation thereof | |
| RU1721990C (ru) | Способ получения гидроксида алюминия | |
| CA1326688C (en) | Abrasive material and method | |
| HK1119426A (en) | Nanoparticles of alumina and oxides of elements of main groups i and ii of the periodic table, and their preparation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |