NO885457L - Fremgangsmaate for fremstilling av stabilisert zirkoniumoksyd. - Google Patents
Fremgangsmaate for fremstilling av stabilisert zirkoniumoksyd.Info
- Publication number
- NO885457L NO885457L NO88885457A NO885457A NO885457L NO 885457 L NO885457 L NO 885457L NO 88885457 A NO88885457 A NO 88885457A NO 885457 A NO885457 A NO 885457A NO 885457 L NO885457 L NO 885457L
- Authority
- NO
- Norway
- Prior art keywords
- zirconium oxide
- powder
- temperature
- stated
- yttrium
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 24
- 229910002076 stabilized zirconia Inorganic materials 0.000 title 1
- 239000000843 powder Substances 0.000 claims description 43
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 27
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 27
- 238000005245 sintering Methods 0.000 claims description 20
- 238000007669 thermal treatment Methods 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 239000000443 aerosol Substances 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 229910052727 yttrium Inorganic materials 0.000 claims description 11
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 10
- 229910052726 zirconium Inorganic materials 0.000 claims description 9
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 8
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 5
- 238000000889 atomisation Methods 0.000 claims description 4
- 150000004820 halides Chemical class 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 239000012798 spherical particle Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims description 2
- -1 salt compound Chemical class 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- 239000000523 sample Substances 0.000 description 19
- 239000000243 solution Substances 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000000280 densification Methods 0.000 description 3
- 230000000877 morphologic effect Effects 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 1
- 238000007088 Archimedes method Methods 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- BSDOQSMQCZQLDV-UHFFFAOYSA-N butan-1-olate;zirconium(4+) Chemical compound [Zr+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] BSDOQSMQCZQLDV-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010193 dilatometric analysis Methods 0.000 description 1
- 238000007571 dilatometry Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000002663 nebulization Methods 0.000 description 1
- 239000006199 nebulizer Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002459 porosimetry Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- NREVZTYRXVBFAQ-UHFFFAOYSA-N propan-2-ol;yttrium Chemical compound [Y].CC(C)O.CC(C)O.CC(C)O NREVZTYRXVBFAQ-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 150000003754 zirconium Chemical class 0.000 description 1
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 description 1
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
- C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G25/00—Compounds of zirconium
- C01G25/02—Oxides
-
- 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
- C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/486—Fine ceramics
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/60—Compounds characterised by their crystallite size
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
-
- 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
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/10—Solid density
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8716549A FR2624505A1 (fr) | 1987-12-11 | 1987-12-11 | Zircone stabilisee, son procede de preparation et son application dans des compositions ceramiques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO885457D0 NO885457D0 (no) | 1988-12-08 |
| NO885457L true NO885457L (no) | 1989-06-12 |
Family
ID=9357288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO88885457A NO885457L (no) | 1987-12-11 | 1988-12-08 | Fremgangsmaate for fremstilling av stabilisert zirkoniumoksyd. |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4999182A (zh) |
| EP (1) | EP0320345A1 (zh) |
| JP (1) | JPH01264961A (zh) |
| KR (1) | KR890009804A (zh) |
| CN (1) | CN1035280A (zh) |
| AU (1) | AU2675888A (zh) |
| BR (1) | BR8806276A (zh) |
| DK (1) | DK685788A (zh) |
| FI (1) | FI885733A (zh) |
| FR (1) | FR2624505A1 (zh) |
| IL (1) | IL88603A0 (zh) |
| NO (1) | NO885457L (zh) |
| PT (1) | PT89197A (zh) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2656861B1 (fr) * | 1990-01-05 | 1992-04-03 | Cezus Co Europ Zirconium | Zircone stabilisee par les oxydes d'yttrium et de cerium. |
| DE4115172C2 (de) * | 1991-05-09 | 1995-08-24 | Nukem Gmbh | Verfahren zur Herstellung von Pulver aus stabilisiertem Zirkonoxid und Verwendung des Verfahrens |
| US5155071A (en) * | 1991-08-16 | 1992-10-13 | E. I. Du Pont De Nemours And Company | Flame-produced partially stabilized zirconia powder |
| GB9123280D0 (en) * | 1991-11-02 | 1991-12-18 | Tioxide Group Services Ltd | Metallic oxides |
| US5266099A (en) * | 1992-08-11 | 1993-11-30 | The United States Of America As Represented By The Secretary Of The Navy | Method for producing closed cell spherical porosity in spray formed metals |
| US5312571A (en) * | 1993-01-07 | 1994-05-17 | Norton Company | Shaped bodies and the production thereof |
| US5447708A (en) * | 1993-01-21 | 1995-09-05 | Physical Sciences, Inc. | Apparatus for producing nanoscale ceramic powders |
| DE69417555T2 (de) * | 1994-09-22 | 1999-10-21 | Asea Brown Boveri Ag, Baden | Verfahren zur Herstellung von einem gemischten Metalloxydpulver und das nach diesem Verfahren hergestellte gemischte Metalloxydpulver |
| US5833892A (en) * | 1996-07-12 | 1998-11-10 | Kemira Pigments, Inc. | Formation of TiO2 pigment by spray calcination |
| US6338809B1 (en) * | 1997-02-24 | 2002-01-15 | Superior Micropowders Llc | Aerosol method and apparatus, particulate products, and electronic devices made therefrom |
| FI20002217A (fi) * | 1999-12-30 | 2001-07-01 | Orion Yhtymae Oyj | Inhalaatiopartikkelit |
| FI20002216A0 (fi) * | 2000-10-06 | 2000-10-06 | Orion Yhtymae Oyj | Yhdistelmäpartikkelit astman hoitoon |
| FI20002215A0 (fi) * | 2000-10-06 | 2000-10-06 | Orion Yhtymae Oyj | Yhdistelmäpartikkelit |
| EP1409409B1 (en) | 2001-07-20 | 2004-12-22 | Altair Nanomaterials Inc. | Process for making lithium titanate |
| EP1282180A1 (en) * | 2001-07-31 | 2003-02-05 | Xoliox SA | Process for producing Li4Ti5O12 and electrode materials |
| CA2478698C (en) * | 2002-03-08 | 2012-05-29 | Altair Nanomaterials Inc. | Process for making nano-sized and sub-micron-sized lithium-transition metal oxides |
| US20040102308A1 (en) * | 2002-11-06 | 2004-05-27 | Simpson Robert E. | Crucible material and crucible |
| FR2868768B1 (fr) * | 2004-04-07 | 2007-07-20 | Rhodia Chimie Sa | Composition a base d'oxydes de zirconium et d'ytrium, procede de preparation et utilisation dans un systeme catalytique |
| KR20080063511A (ko) * | 2005-10-21 | 2008-07-04 | 알타이어나노 인코포레이티드 | 리튬 이온 배터리들 |
| US8420264B2 (en) * | 2007-03-30 | 2013-04-16 | Altairnano, Inc. | Method for preparing a lithium ion cell |
| CN102428212B (zh) * | 2009-05-08 | 2014-04-02 | 有限会社渊田纳米技研 | 氧化锆膜的成膜方法 |
| KR101354495B1 (ko) * | 2012-10-11 | 2014-01-23 | 주식회사 그린리소스 | 금속염 화합물의 전구체용액을 이용한 구형 세라믹 분말 제조방법 및 구형 금속염 분말의 제조장치 |
| FR3012135A1 (fr) * | 2013-10-17 | 2015-04-24 | Saint Gobain Ct Recherches | Melange particulaire pour l'obtention d'un produit en zircone yttriee |
| CN111883788A (zh) * | 2020-06-24 | 2020-11-03 | 华南理工大学 | 一种氧化铈基中低温固体氧化物燃料电池关键材料的制备方法 |
| CN116199258A (zh) * | 2022-12-30 | 2023-06-02 | 化学与精细化工广东省实验室潮州分中心 | 一种粒径可控的纳米Zr2O粉体的制备方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3514252A (en) * | 1967-07-07 | 1970-05-26 | Grace W R & Co | Process for the preparation of stabilized zirconia powders |
| JPS6042274A (ja) * | 1983-08-11 | 1985-03-06 | 東芝セラミックス株式会社 | ジルコニア質耐火物の製造法 |
| FR2578241B1 (fr) * | 1985-03-01 | 1990-03-30 | Rhone Poulenc Spec Chim | Zircone stabilisee, son procede de preparation et son application dans des compositions ceramiques |
| US4619817A (en) * | 1985-03-27 | 1986-10-28 | Battelle Memorial Institute | Hydrothermal method for producing stabilized zirconia |
| JPS6230605A (ja) * | 1985-08-02 | 1987-02-09 | Nippon Mining Co Ltd | 微粉体の製造法 |
| US4639356A (en) * | 1985-11-05 | 1987-01-27 | American Cyanamid Company | High technology ceramics with partially stabilized zirconia |
-
1987
- 1987-12-11 FR FR8716549A patent/FR2624505A1/fr active Pending
-
1988
- 1988-11-29 BR BR888806276A patent/BR8806276A/pt unknown
- 1988-12-02 EP EP88403043A patent/EP0320345A1/fr not_active Withdrawn
- 1988-12-06 IL IL88603A patent/IL88603A0/xx unknown
- 1988-12-08 NO NO88885457A patent/NO885457L/no unknown
- 1988-12-09 DK DK685788A patent/DK685788A/da not_active Application Discontinuation
- 1988-12-09 FI FI885733A patent/FI885733A/fi not_active IP Right Cessation
- 1988-12-09 JP JP63310293A patent/JPH01264961A/ja active Pending
- 1988-12-09 AU AU26758/88A patent/AU2675888A/en not_active Abandoned
- 1988-12-09 PT PT89197A patent/PT89197A/pt not_active Application Discontinuation
- 1988-12-10 CN CN88108837A patent/CN1035280A/zh active Pending
- 1988-12-11 KR KR1019880016502A patent/KR890009804A/ko not_active Application Discontinuation
- 1988-12-12 US US07/282,566 patent/US4999182A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US4999182A (en) | 1991-03-12 |
| IL88603A0 (en) | 1989-07-31 |
| DK685788A (da) | 1989-06-12 |
| AU2675888A (en) | 1989-06-15 |
| FI885733A0 (fi) | 1988-12-09 |
| FR2624505A1 (fr) | 1989-06-16 |
| EP0320345A1 (fr) | 1989-06-14 |
| FI885733A (fi) | 1989-06-12 |
| CN1035280A (zh) | 1989-09-06 |
| NO885457D0 (no) | 1988-12-08 |
| KR890009804A (ko) | 1989-08-04 |
| JPH01264961A (ja) | 1989-10-23 |
| BR8806276A (pt) | 1989-08-15 |
| DK685788D0 (da) | 1988-12-09 |
| PT89197A (pt) | 1989-12-29 |
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