Title:
HIGHLY REACTIVE BARIUM CARBONATE
Document Type and Number:
WIPO Patent Application WO2001049609
Kind Code:
A3
Abstract:
The invention relates to a micronized barium carbonate, which is produced by adding an agent that impedes crystal growth, to a method for the production thereof, and to its use. Due to its extremely high reactivity, the produced micronized barium carbonate having a BET surface of at least 32 m<2>/g is suited, in particular, for producing capacitors, thermistors and other oxide ceramic electrical components, which contain calcium oxide, barium oxide or strontium oxide, as well as for producing high-temperature superconductors. Ammonium salts or alkylammonium salts of carboxylic acids, which comprise a total of 3 to 12 C atoms as well as at least two COOH groups or at least 2 OH groups, e.g. salts of maleic acid or of citric acid are used as the agent that impedes crystal growth.
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Inventors:
KOEHLER KARL (DE)
PARK JAI WON (DE)
HARDINGHAUS FERDINAND (DE)
KUEHN ULRICH (DE)
BIASCI LUCA (IT)
PARK JAI WON (DE)
HARDINGHAUS FERDINAND (DE)
KUEHN ULRICH (DE)
BIASCI LUCA (IT)
Application Number:
PCT/EP2000/013260
Publication Date:
December 27, 2001
Filing Date:
December 23, 2000
Export Citation:
Assignee:
SOLVAY BARIUM STRONTIUM GMBH (DE)
KOEHLER KARL (DE)
PARK JAI WON (DE)
HARDINGHAUS FERDINAND (DE)
KUEHN ULRICH (DE)
BIASCI LUCA (IT)
KOEHLER KARL (DE)
PARK JAI WON (DE)
HARDINGHAUS FERDINAND (DE)
KUEHN ULRICH (DE)
BIASCI LUCA (IT)
International Classes:
C01F11/18; H01C7/02; H01C7/04; H01G4/12; (IPC1-7): C01F11/18; H01C17/065; H01G4/12; H01L39/12
Domestic Patent References:
| WO1997015530A2 | 1997-05-01 |
Foreign References:
| US3421843A | 1969-01-14 | |||
| US3862746A | 1975-01-28 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 10 17 November 2000 (2000-11-17)
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