WO1997015530B1 - Micronized alkaline earth metal carbonate - Google Patents
Micronized alkaline earth metal carbonateInfo
- Publication number
- WO1997015530B1 WO1997015530B1 PCT/DE1996/002006 DE9602006W WO9715530B1 WO 1997015530 B1 WO1997015530 B1 WO 1997015530B1 DE 9602006 W DE9602006 W DE 9602006W WO 9715530 B1 WO9715530 B1 WO 9715530B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- reaction mixture
- solution
- oxide
- surface area
- Prior art date
Links
- -1 alkaline earth metal carbonate Chemical class 0.000 title claims abstract 6
- 229910052784 alkaline earth metal Inorganic materials 0.000 title claims abstract 3
- 150000003863 ammonium salts Chemical class 0.000 claims abstract 6
- VZCYOOQTPOCHFL-UHFFFAOYSA-N fumaric acid Chemical class OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims abstract 5
- 239000011976 maleic acid Substances 0.000 claims abstract 5
- 238000000034 method Methods 0.000 claims abstract 5
- AYJRCSIUFZENHW-UHFFFAOYSA-L Barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims abstract 4
- 239000003795 chemical substances by application Substances 0.000 claims abstract 4
- 229910000018 strontium carbonate Inorganic materials 0.000 claims abstract 4
- 239000003990 capacitor Substances 0.000 claims abstract 3
- 125000004432 carbon atoms Chemical group C* 0.000 claims abstract 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract 3
- 125000000896 monocarboxylic acid group Chemical group 0.000 claims abstract 3
- 238000002360 preparation method Methods 0.000 claims abstract 3
- 239000002887 superconductor Substances 0.000 claims abstract 3
- LEDMRZGFZIAGGB-UHFFFAOYSA-L Strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 claims abstract 2
- 125000005210 alkyl ammonium group Chemical group 0.000 claims abstract 2
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 11
- 239000011541 reaction mixture Substances 0.000 claims 9
- WNLRTRBMVRJNCN-UHFFFAOYSA-N Adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims 4
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims 4
- 229940098895 maleic acid Drugs 0.000 claims 4
- 238000004519 manufacturing process Methods 0.000 claims 4
- 101700042850 Bacc Proteins 0.000 claims 3
- 150000001734 carboxylic acid salts Chemical class 0.000 claims 3
- 235000015165 citric acid Nutrition 0.000 claims 3
- 238000002156 mixing Methods 0.000 claims 3
- 239000002245 particle Substances 0.000 claims 3
- 229940097043 Glucuronic Acid Drugs 0.000 claims 2
- FEWJPZIEWOKRBE-XIXRPRMCSA-N Mesotartaric acid Chemical compound OC(=O)[C@@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-XIXRPRMCSA-N 0.000 claims 2
- 239000001361 adipic acid Substances 0.000 claims 2
- 235000011037 adipic acid Nutrition 0.000 claims 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 2
- 239000000174 gluconic acid Substances 0.000 claims 2
- 235000012208 gluconic acid Nutrition 0.000 claims 2
- 229950006191 gluconic acid Drugs 0.000 claims 2
- 238000001556 precipitation Methods 0.000 claims 2
- 239000011975 tartaric acid Substances 0.000 claims 2
- 229960001367 tartaric acid Drugs 0.000 claims 2
- 235000002906 tartaric acid Nutrition 0.000 claims 2
- AEMOLEFTQBMNLQ-QIUUJYRFSA-N β-D-glucuronic acid Chemical compound O[C@@H]1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-QIUUJYRFSA-N 0.000 claims 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N Malic acid Chemical compound OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims 1
- 241000282941 Rangifer tarandus Species 0.000 claims 1
- DSLZVSRJTYRBFB-LLEIAEIESA-N Saccharic acid Chemical compound OC(=O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O DSLZVSRJTYRBFB-LLEIAEIESA-N 0.000 claims 1
- 229960000250 adipic acid Drugs 0.000 claims 1
- BWKOZPVPARTQIV-UHFFFAOYSA-N azanium;hydron;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [NH4+].OC(=O)CC(O)(C(O)=O)CC([O-])=O BWKOZPVPARTQIV-UHFFFAOYSA-N 0.000 claims 1
- 229910052788 barium Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 229960004106 citric acid Drugs 0.000 claims 1
- CKKXWJDFFQPBQL-UAIGNFCESA-N diazanium;(Z)-but-2-enedioate Chemical compound [NH4+].[NH4+].[O-]C(=O)\C=C/C([O-])=O CKKXWJDFFQPBQL-UAIGNFCESA-N 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 239000001630 malic acid Substances 0.000 claims 1
- 235000011090 malic acid Nutrition 0.000 claims 1
- 229940099690 malic acid Drugs 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000003638 reducing agent Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000003746 solid phase reaction Methods 0.000 claims 1
- 238000010671 solid-state reaction Methods 0.000 claims 1
- 229910052712 strontium Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N Barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 abstract 2
- IATRAKWUXMZMIY-UHFFFAOYSA-N Strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 abstract 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract 2
- 229960003563 Calcium Carbonate Drugs 0.000 abstract 1
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 239000000292 calcium oxide Substances 0.000 abstract 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 239000011224 oxide ceramic Substances 0.000 abstract 1
- 229910052574 oxide ceramic Inorganic materials 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
Abstract
The invention concerns a micronized alkaline earth metal carbonate prepared with or without the use of an agent preventing crystal growth, and a process for its preparation and use. The prepared micronized calcium carbonate, barium carbonate with a BET surface area ranging from 3 to 30 m2/g or strontium carbonate with a BET surface area ranging from 3 to 50 m2/g is suitable in particular for preparing capacitors, thermistors and other oxide ceramic electrical components containing calcium oxide, barium oxide or strontium oxide, and high-temperature superconductors. Ammonium salts or alkylammonium salts of carboxylic acids having a total of between 3 and 12 carbon atoms and at least two COOH groups or at least two OH groups, e.g. salts of maleic acid or nitric acid, are used as agents preventing crystal growth.
Claims
1. Verfahren zur Herstellung von partikeiförmigern Erd- alkalimetallcarbonat EaCOß, wobei mindestens 95% der Partikel einen Durchmesser von < 1,0 μm aufweisen und Ea für Ba oder Sr steht, wobei man eine Ea(OH)2-Lösung mit einer Konzentra¬ tion von 0,1 bis 0,75 mol/1 an Ea(OH)2 mit CO2 unter Bildung eines Reaktionsgemisches versetzt, wobei man pro Liter Lösung etwa 2 bis 30 1 CÜ2-Gas einsetzt, das Reaktionsgemisch durch einen kontinuierlich arbeitenden Mischreaktor leitet, in wel¬ chem Scher-, Schub- und Reibungskräfte von ineinandergreifen¬ den Werkzeugen mit hoher Relativgeschwindigkeit auf die Reak¬ tionsmischung einwirken, man nach Passieren des Reaktors aus dem Reaktionsgemisch gebildetes EaCC>3 abtrennt und trocknet.1. A process for the preparation of particle-form alkaline earth metal carbonate EaCOß, wherein at least 95% of the particles have a diameter of <1.0 microns and Ea is Ba or Sr, wherein an Ea (OH) 2 solution with a concentration from 0.1 to 0.75 mol / 1 of Ea (OH) 2 with CO2 to form a reaction mixture, wherein per liter of solution about 2 to 30 1 CÜ2 gas used, the reaction mixture passes through a continuous mixing reactor, in the shear, shear and frictional forces of interengaging tools act on the reaction mixture at high relative speed, and after passing through the reactor, EaCC> 3 formed from the reaction mixture is separated off and dried.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man BaCOß herstellt.2. The method according to claim 1, characterized in that BaCOß is produced.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das abgetrennte SrCθ3 bzw. BaCC>3 vor dem Trocknen ein- oder mehrmals mit Wasser wäscht.3. The method according to claim 1, characterized in that the separated SrCθ3 or BaCC> 3 is washed one or more times with water before drying.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Fällung von SrC03 bzw. BaCC>3 in der mit CO2 ver¬ setzten Lösung bei einer Temperatur im Bereich von 0 °C bis 130 °C, vorzugsweise 40 bis 130 °C durchführt.4. The method according to claim 1, characterized in that one carries out the precipitation of SrC03 or BaCC> 3 in the solution with CO2 ver¬ at a temperature in the range of 0 ° C to 130 ° C, preferably 40 to 130 ° C. ,
5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Umdrehungszahl des Rotors 2.000 bis 8.000 U/min be¬ trägt.5. The method according to claim 1, characterized in that the number of revolutions of the rotor 2,000 to 8,000 rev / min carries be¬.
6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Verweilzeit des Reaktionsgemisches im Mischreaktor bis 5 see beträgt. 1 96. The method according to claim 1, characterized in that the residence time of the reaction mixture in the mixing reactor to 5 see. 1 9
7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man vor, während und/oder nach der Fällung ein das Kri¬ stallwachstum verhinderndes Mittel zusetzt.7. The method according to claim 1, characterized in that before, during and / or added after the precipitation of a Kri¬ stall growth preventing agent.
8. Verfahren zur Herstellung von partikelförmigem BaCC>3 oder SrC03 gemäß Anspruch 1 oder 7, dadurch gekennzeichnet, daß man unter Verwendung eines das Kristallwachstum verhin¬ dernden Mittels ausgewählt aus der Gruppe umfassend Ammonium¬ salze und Aikylammoniumsalze von Carbonsäuren, die insgesamt 3 bis 12 C-Atome sowie mindestens 2 COOH-Gruppen oder minde¬ stens 2 OH-Gruppen aufweisen, eine Ea(OH)2-Lösung mit einer Konzentration von 0,1 bis 0,75 mol/1 an Ea(OH)2 mit CO2 unter Bildung eines Reaktionsgemisches versetzt, wobei man pro Li¬ ter Lösung etwa 2 bis 30 1 Cθ2"Gas einsetzt, das Reaktionsge¬ misch durch einen Mischreaktor leitet, in welchem Scher-, Schub- und Reibungskräfte auf die Reaktionsmischung einwir¬ ken, man nach Passieren der Vorrichtung aus dem Reak¬ tionsgemisch gebildetes EaC03, nämlich BaCθ3 oder SrCθ3 ab¬ trennt und trocknet.8. A process for the preparation of particulate BaCC> 3 or SrC03 according to claim 1 or 7, characterized in that using a crystal growth verhin¬ reducing agent selected from the group comprising ammonium salts and Aikylammoniumsalze of carboxylic acids, the total of 3 to 12 C atoms and at least 2 COOH groups or minde¬ least 2 OH groups, an Ea (OH) 2 solution having a concentration of 0.1 to 0.75 mol / 1 of Ea (OH) 2 with CO2 under Forming a reaction mixture is added, whereby per liter of solution about 2 to 30 liters of CO 2 gas are used, the reaction mixture is passed through a mixing reactor in which shear, shear and frictional forces act upon the reaction mixture, after passing the device from the Reak¬ tion mixture formed EaC03, namely BaCθ3 or SrCθ3 separates off and dried.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß man ein Ammoniumsalz oder Alkylammoniumsalz der Zitronen¬ säure, der Apfelsäure, Adipinsäure, Gluconsäure, Glucarsäure, Glucuronsäure, Weinsäure oder Maleinsäure, vorzugsweise ein Ammoniumsalz der Zitronen- oder Maleinsäure einsetzt.9. The method according to claim 8, characterized in that one uses an ammonium salt or alkyl ammonium salt of citric acid, malic acid, adipic acid, gluconic acid, glucaric acid, glucuronic acid, tartaric acid or maleic acid, preferably an ammonium salt of citric or maleic acid.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß man Ammoniumzitrat oder -maleat verwendet, welches man durch Einleiten von NH3 oder durch Zusatz wäßriger NH3-Lösung in wäßrige Zitronensäurelösung oder Maleinsäurelösung bis zum Erreichen eines pH-Wertes von 6 bis 8 hergestellt hat.10. The method according to claim 9, characterized in that one uses ammonium citrate or maleate, which has been prepared by introducing NH3 or by adding aqueous NH3 solution in aqueous citric acid solution or maleic acid solution to reach a pH of 6 to 8.
11. Verfahren nach Anspruch 8, 9 oder 10, dadurch ge¬ kennzeichnet, daß man das Carbonsäuresalz in Form einer wä߬ rigen Lösung einsetzt. 2011. The method according to claim 8, 9 or 10, characterized ge indicates that the carboxylic acid salt is used in the form of a wä߬ rigen solution. 20
12. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß man das Carbonsäuresalz in einer Menge von mindestens 0,01 Gew.-%, vorzugsweise 0,01 bis 5 Gew.-%, bezogen auf das hergestellte EaCθ3 oder das herzustellende EaCθ3 einsetzt.12. The method according to claim 8, characterized in that one uses the carboxylic acid salt in an amount of at least 0.01 wt .-%, preferably 0.01 to 5 wt .-%, based on the produced EaCθ3 or the EaCθ3 to be produced.
13. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß man das Carbonsäuresalz sofort nach dem Passieren der Re¬ aktionsmischung durch den Reaktor zumischt.13. The method according to claim 8, characterized in that admixing the carboxylic acid salt immediately after passing through the reaction mixture through the reactor.
14. Partikelförmiges BaCθ3 mit einer BET-Oberfläche im Bereich von 3 bis 30 m2/g, SrC03 mit einer BET-Oberfläche im Bereich von 3 bis 50 m2/g, wobei mindestens 95 %, vorzugswei¬ se mindestens 99 %, insbesondere 100 % der Partikel einen Durchmesser < 1,0 μm aufweisen, erhalten nach einem Verfahren der Ansprüche 1 bis 13 unter Verwendung von das Kristall¬ wachstum verhindernden Mitteln, ausgewählt aus der Gruppe um¬ fassend Arnmoniumsalze und Aikylammoniumsalze von Carbonsäu¬ ren, die insgesamt 3 bis 12 C-Atome sowie mindestens 2 COOH- Gruppen oder mindestens 2 OH-Gruppen aufweisen.14. Particulate BaCO 3 having a BET surface area in the range from 3 to 30 m 2 / g, SrCO 3 having a BET surface area in the range from 3 to 50 m 2 / g, where at least 95%, preferably at least 99%, in particular 100% of the particles have a diameter <1.0 .mu.m, obtained by a process of claims 1 to 13 using crystal growth-preventing agents selected from the group um¬ comprising ammonium salts and Aikylammoniumsalze of Carbonsäu¬ ren, the total of 3 have up to 12 carbon atoms and at least 2 COOH groups or at least 2 OH groups.
15. BaCθ3 oder SrCθ3 nach Anspruch 1, dadurch gekenn¬ zeichnet, daß Ammoniumsalze oder Aikylammoniumsalze der Ap¬ felsäure, Adipinsäure, Zitronensäure, Gluconsäure, Glucarsäu¬ re, Glucuronsäure, Weinsäure oder Maleinsäure verwendet wur¬ den.15. BaCθ3 or SrCθ3 according to claim 1, characterized gekenn¬ characterized in that ammonium salts or Aikylammoniumsalze the Ap¬ felsäure, adipic acid, citric acid, gluconic acid, Glucarsäu¬ re, glucuronic acid, tartaric acid or maleic acid wur¬ used.
16. Partikelförmiges BaCθ3 mit einer BET-Oberfläche im Bereich von 3 bis 30 m2/g, partikelförmiges SrC03 mit einer BET-Oberfläche im Bereich von 3 bis 50 m2/g, wobei mindestens 90 % der Partikel einen Durchmesser im Bereich von 0,1 bis 1,0 μm aufweisen, erhalten nach dem Verfahren der Ansprüche 1 bis 6, und welches frei von das Kristallwachstum verhindern¬ den Mitteln ist. 2 116. Particulate BaCO 3 having a BET surface area in the range of 3 to 30 m 2 / g, particulate SrCO 3 having a BET surface area in the range of 3 to 50 m 2 / g, wherein at least 90% of the particles have a diameter in the range of 0 , 1 to 1.0 μm, obtained by the process of claims 1 to 6, and which is free from the crystal growth prevent¬ the means. 2 1
17. Verwendung von Bariumcarbonat gemäß Anspruch 14, 15 oder 16 für thermische Feststoffreaktionen, insbesondere zur Herstellung von oxidhaltigen Keramikmaterialien für elektri¬ sche und magnetische Anwendungen, insbesondere zur Herstel¬ lung von oxidischen Supraleitern, von Thermistoren, Kondensa¬ toren.17. Use of barium carbonate according to claim 14, 15 or 16 for thermal solid reactions, in particular for the production of oxide-containing ceramic materials for elektri¬ cal and magnetic applications, in particular for the manufacture of oxide superconductors, of thermistors, capacitors.
18. Verwendung von Strontiumcarbonat gemäß Anspruch 14, 15 oder 16 für thermische Feststoffreaktionen, insbesondere zur Herstellung von oxidhaltigen Keramikmaterialien für elek¬ trische und magnetische Anwendungen, insbesondere zur Her¬ stellung von oxidischen Supraleitern, von Thermistoren, Kon¬ densatoren. 18. Use of strontium carbonate according to claim 14, 15 or 16 for thermal solid-state reactions, in particular for the production of oxide-containing ceramic materials for elek¬ trical and magnetic applications, in particular for the production of oxide superconductors, of thermistors, capacitors Kon¬.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE59602568T DE59602568D1 (en) | 1995-10-26 | 1996-10-22 | MICRONIZED EARTH ALKALINE METAL CARBONATE |
| US09/065,067 US6479029B1 (en) | 1995-10-26 | 1996-10-22 | Micronized alkaline earth metal carbonate |
| EP96945521A EP0857160B1 (en) | 1995-10-26 | 1996-10-22 | Micronized alkaline earth metal carbonate |
| JP51619497A JP4528370B2 (en) | 1995-10-26 | 1996-10-22 | Method for producing particulate alkaline earth metal carbonate, and method for producing alkaline earth metal carbonate and oxide-containing ceramic material obtained by the method |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19539813 | 1995-10-26 | ||
| DE19539813.0 | 1995-10-26 | ||
| DE19548131.3 | 1995-12-21 | ||
| DE19548131 | 1995-12-21 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1997015530A2 WO1997015530A2 (en) | 1997-05-01 |
| WO1997015530A3 WO1997015530A3 (en) | 1997-06-05 |
| WO1997015530B1 true WO1997015530B1 (en) | 1997-07-03 |
Family
ID=26019793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1996/002006 WO1997015530A2 (en) | 1995-10-26 | 1996-10-22 | Micronized alkaline earth metal carbonate |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6479029B1 (en) |
| EP (1) | EP0857160B1 (en) |
| JP (2) | JP4528370B2 (en) |
| KR (1) | KR100424536B1 (en) |
| AT (1) | ATE182559T1 (en) |
| DE (2) | DE19643657A1 (en) |
| TW (1) | TW369511B (en) |
| WO (1) | WO1997015530A2 (en) |
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| JPS56160322A (en) * | 1980-05-06 | 1981-12-10 | Shiraishi Chuo Kenkyusho:Kk | Manufacture of calcium carbonate with superior dispersibility |
| JPS59223225A (en) * | 1983-05-27 | 1984-12-15 | Shiraishi Chuo Kenkyusho:Kk | Manufacture of calcium carbonate |
| JPS60189832A (en) * | 1984-03-09 | 1985-09-27 | Toshiba Corp | Preparation of alkaline-earth carbonate |
| DE3717058A1 (en) * | 1987-05-21 | 1988-12-08 | Bayer Ag | MIXER FOR MIXING AT LEAST TWO FLOWABLE SUBSTANCES, ESPECIALLY UNDERSTANDING OR. INITIATING A REACTION DURING MIXING |
| JP2605446B2 (en) * | 1990-03-09 | 1997-04-30 | 住友金属工業株式会社 | Method of manufacturing porcelain material |
| US5059407A (en) * | 1990-03-28 | 1991-10-22 | Liquid Carbonic Corporation | Liquid carbon dioxide injection in exothermic chemical reactions |
| JP3321823B2 (en) * | 1992-03-04 | 2002-09-09 | 株式会社村田製作所 | Non-reducing dielectric porcelain composition |
| DE4207923A1 (en) * | 1992-03-13 | 1993-09-16 | Solvay Barium Strontium Gmbh | Calcium, barium or strontium carbonate granulation for use in glass mfr. - by mixing powder with binder, drying and calcining opt. without contact with inorganic refractory material, to avoid contamination |
| JP3243912B2 (en) * | 1992-12-25 | 2002-01-07 | 住友化学工業株式会社 | Continuous production method of aluminum hydroxide |
| JP3407333B2 (en) * | 1993-05-24 | 2003-05-19 | 松下電器産業株式会社 | Method for producing carbonate for electron tube cathode |
| JP3232794B2 (en) * | 1993-07-12 | 2001-11-26 | 堺化学工業株式会社 | Method for producing fine barium carbonate for producing barium titanate |
| JP3269910B2 (en) * | 1994-03-30 | 2002-04-02 | 太陽誘電株式会社 | Porcelain capacitor and method of manufacturing the same |
-
1996
- 1996-10-22 AT AT96945521T patent/ATE182559T1/en active
- 1996-10-22 JP JP51619497A patent/JP4528370B2/en not_active Expired - Lifetime
- 1996-10-22 DE DE19643657A patent/DE19643657A1/en not_active Withdrawn
- 1996-10-22 WO PCT/DE1996/002006 patent/WO1997015530A2/en active IP Right Grant
- 1996-10-22 KR KR10-1998-0702750A patent/KR100424536B1/en not_active IP Right Cessation
- 1996-10-22 EP EP96945521A patent/EP0857160B1/en not_active Expired - Lifetime
- 1996-10-22 DE DE59602568T patent/DE59602568D1/en not_active Expired - Lifetime
- 1996-10-22 US US09/065,067 patent/US6479029B1/en not_active Expired - Lifetime
- 1996-12-06 TW TW085115060A patent/TW369511B/en not_active IP Right Cessation
-
2010
- 2010-02-12 JP JP2010028518A patent/JP5393518B2/en not_active Expired - Lifetime
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