CS277000B6 - Novel super conductive compounds of the ûki2nifi4ù type with high junction temperature and process for preparing thereof - Google Patents
Novel super conductive compounds of the ûki2nifi4ù type with high junction temperature and process for preparing thereof Download PDFInfo
- Publication number
- CS277000B6 CS277000B6 CS88361A CS36188A CS277000B6 CS 277000 B6 CS277000 B6 CS 277000B6 CS 88361 A CS88361 A CS 88361A CS 36188 A CS36188 A CS 36188A CS 277000 B6 CS277000 B6 CS 277000B6
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- rare earth
- earth metal
- lanthanum
- temperature
- transition metal
- Prior art date
Links
- 150000001875 compounds Chemical class 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title description 11
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 55
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 54
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 30
- 150000003624 transition metals Chemical class 0.000 claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 24
- 238000000137 annealing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000008188 pellet Substances 0.000 claims abstract description 15
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012467 final product Substances 0.000 claims abstract description 8
- 239000002244 precipitate Substances 0.000 claims abstract description 8
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims abstract description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 33
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 32
- 230000007704 transition Effects 0.000 claims description 31
- 229910052788 barium Inorganic materials 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 16
- 239000011575 calcium Substances 0.000 claims description 15
- 238000000354 decomposition reaction Methods 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 10
- 229910052712 strontium Inorganic materials 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000006467 substitution reaction Methods 0.000 claims description 8
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 7
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 229910052684 Cerium Inorganic materials 0.000 claims description 5
- 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 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000000975 co-precipitation Methods 0.000 claims description 3
- 239000011872 intimate mixture Substances 0.000 claims description 3
- 150000003891 oxalate salts Chemical class 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 2
- 238000003746 solid phase reaction Methods 0.000 abstract description 2
- 238000010671 solid-state reaction Methods 0.000 abstract description 2
- 238000011282 treatment Methods 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 150000002823 nitrates Chemical class 0.000 abstract 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 29
- 239000002887 superconductor Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 229910002480 Cu-O Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 4
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical class [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000005751 Copper oxide Substances 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 244000309464 bull Species 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- -1 nickel potassium potassium fluoride Chemical compound 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 2
- 229910016063 BaPb Inorganic materials 0.000 description 1
- 241000877463 Lanio Species 0.000 description 1
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Inorganic materials [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- CDIWDWCAAPSXTR-UHFFFAOYSA-N cerium oxonickel Chemical compound [Ni]=O.[Ce] CDIWDWCAAPSXTR-UHFFFAOYSA-N 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- FVIZARNDLVOMSU-UHFFFAOYSA-N ginsenoside K Natural products C1CC(C2(CCC3C(C)(C)C(O)CCC3(C)C2CC2O)C)(C)C2C1C(C)(CCC=C(C)C)OC1OC(CO)C(O)C(O)C1O FVIZARNDLVOMSU-UHFFFAOYSA-N 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 1
- RVLXVXJAKUJOMY-UHFFFAOYSA-N lanthanum;oxonickel Chemical compound [La].[Ni]=O RVLXVXJAKUJOMY-UHFFFAOYSA-N 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000005658 nuclear physics Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910001994 rare earth metal nitrate Inorganic materials 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 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
- C04B35/45—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 copper oxide or solid solutions thereof with other oxides
- C04B35/4504—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 copper oxide or solid solutions thereof with other oxides containing rare earth oxides
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0268—Manufacture or treatment of devices comprising copper oxide
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/80—Constructional details
- H10N60/85—Superconducting active materials
- H10N60/855—Ceramic superconductors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/80—Constructional details
- H10N60/85—Superconducting active materials
- H10N60/855—Ceramic superconductors
- H10N60/857—Ceramic superconductors comprising copper 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)
- Inorganic Compounds Of Heavy Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP87100961A EP0275343A1 (de) | 1987-01-23 | 1987-01-23 | Supraleitender Verbund des Strukturtypes von K2NiF4 mit hoher Übergangstemperatur und Verfahren zu seiner Herstellung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS8800361A2 CS8800361A2 (en) | 1991-07-16 |
| CS277000B6 true CS277000B6 (en) | 1992-11-18 |
Family
ID=8196696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS88361A CS277000B6 (en) | 1987-01-23 | 1988-01-19 | Novel super conductive compounds of the ûki2nifi4ù type with high junction temperature and process for preparing thereof |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US8688181B1 (de) |
| EP (1) | EP0275343A1 (de) |
| AU (1) | AU604827B2 (de) |
| BR (1) | BR8707107A (de) |
| CS (1) | CS277000B6 (de) |
| DK (1) | DK31388A (de) |
| FI (1) | FI880171A (de) |
| HU (1) | HU205493B (de) |
| IL (1) | IL84667A0 (de) |
| NO (1) | NO880187L (de) |
| PL (1) | PL159721B1 (de) |
| PT (1) | PT85720A (de) |
| YU (1) | YU46098B (de) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6638894B1 (en) * | 1987-01-09 | 2003-10-28 | Lucent Technologies Inc. | Devices and systems based on novel superconducting material |
| GB2201955B (en) * | 1987-03-11 | 1991-09-18 | Ibm | Electrically superconducting compositions and processes for their preparation |
| AU598115B2 (en) * | 1987-03-18 | 1990-06-14 | Semiconductor Energy Laboratory Co. Ltd. | Superconducting oxide ceramics |
| EP0283620A1 (de) * | 1987-03-25 | 1988-09-28 | Semiconductor Energy Laboratory Co., Ltd. | Supraleitende Keramiken |
| JPH01133908A (ja) * | 1987-03-30 | 1989-05-26 | Yokogawa Hewlett Packard Ltd | 超伝導体材料の製造方法 |
| EP0287749A1 (de) * | 1987-04-23 | 1988-10-26 | International Business Machines Corporation | Mehrschichtige superleitende Kupferoxid-Verbindungen |
| EP0366721A4 (en) * | 1987-06-09 | 1991-04-24 | E.I. Du Pont De Nemours And Company | Improved process for making 90 k superconductors |
| AU600156B2 (en) * | 1987-08-06 | 1990-08-02 | University Of Arkansas, The | Meltable high temperature superconductor |
| AU589068B2 (en) * | 1987-08-10 | 1989-09-28 | Furukawa Electric Co. Ltd., The | Method of manufacturing oxide superconductor, and method of manufacturing composite oxide powder which is the precursor of the oxide superconductor |
| NZ226103A (en) * | 1987-09-11 | 1991-04-26 | Grace W R & Co | Preparation of superconducting mixed metal oxide ceramics with minimal extraneous matter |
| US5023067A (en) * | 1987-09-11 | 1991-06-11 | W. R. Grace & Co.-Conn. | Manufacturing method for ceramics and products thereof |
| AU2920289A (en) * | 1987-12-30 | 1989-08-01 | Unisearch Limited | Improved method for producing ceramic superconductors |
| US5196388A (en) * | 1991-06-10 | 1993-03-23 | Akzo N.V. | Process for the preparation of double metal oxide powders containing a Group IIIA and a Group IVB element and a novel double metal hydroxyl carboxylate useful in preparing same |
| DE10208883A1 (de) * | 2002-03-01 | 2003-09-18 | Forschungszentrum Juelich Gmbh | Sauerstoffmembran für den Einsatz bei hohen Temperaturen |
| CN100564312C (zh) | 2004-12-23 | 2009-12-02 | 超导技术公司 | (RE)Ba2Cu3O7-δ薄膜超导体的RF性质优化的组成 |
| RU2709463C1 (ru) * | 2019-06-28 | 2019-12-18 | Федеральное государственное бюджетное учреждение науки Институт высокотемпературной электрохимии Уральского отделения Российской Академии наук | Твердооксидный электродный материал |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125597B1 (de) * | 1966-11-22 | 1976-07-31 | ||
| EP0283620A1 (de) * | 1987-03-25 | 1988-09-28 | Semiconductor Energy Laboratory Co., Ltd. | Supraleitende Keramiken |
| US4897378A (en) * | 1987-05-22 | 1990-01-30 | Massachusetts Institute Of Technology | Preparation of thin film superconducting oxides |
| AU600156B2 (en) * | 1987-08-06 | 1990-08-02 | University Of Arkansas, The | Meltable high temperature superconductor |
-
1987
- 1987-01-23 EP EP87100961A patent/EP0275343A1/de not_active Withdrawn
- 1987-09-15 PT PT85720A patent/PT85720A/pt not_active Application Discontinuation
- 1987-12-01 IL IL84667A patent/IL84667A0/xx unknown
- 1987-12-28 YU YU240487A patent/YU46098B/sh unknown
- 1987-12-29 BR BR8707107A patent/BR8707107A/pt unknown
-
1988
- 1988-01-15 FI FI880171A patent/FI880171A/fi not_active Application Discontinuation
- 1988-01-18 NO NO880187A patent/NO880187L/no unknown
- 1988-01-19 CS CS88361A patent/CS277000B6/cs unknown
- 1988-01-20 PL PL1988270217A patent/PL159721B1/pl unknown
- 1988-01-22 HU HU88263A patent/HU205493B/hu not_active IP Right Cessation
- 1988-01-22 AU AU10699/88A patent/AU604827B2/en not_active Ceased
- 1988-01-22 DK DK031388A patent/DK31388A/da not_active Application Discontinuation
-
1994
- 1994-09-09 US US08/303,561 patent/US8688181B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| PL159721B1 (pl) | 1993-01-29 |
| HU205493B (en) | 1992-04-28 |
| NO880187L (no) | 1988-07-25 |
| AU1069988A (en) | 1988-07-28 |
| BR8707107A (pt) | 1988-08-02 |
| HUT49422A (en) | 1989-09-28 |
| FI880171A (fi) | 1988-07-24 |
| AU604827B2 (en) | 1991-01-03 |
| YU46098B (sh) | 1992-12-21 |
| FI880171A0 (fi) | 1988-01-15 |
| DK31388A (da) | 1988-07-24 |
| IL84667A0 (en) | 1988-05-31 |
| YU240487A (en) | 1989-08-31 |
| PT85720A (pt) | 1989-02-28 |
| DK31388D0 (da) | 1988-01-22 |
| US8688181B1 (en) | 2014-04-01 |
| CS8800361A2 (en) | 1991-07-16 |
| NO880187D0 (no) | 1988-01-18 |
| PL270217A1 (en) | 1988-10-13 |
| EP0275343A1 (de) | 1988-07-27 |
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