Tantalum metal power with controlled size distribution and products made therefrom
US5986877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1998 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jul 28, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/045
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A capacitor having a central electrode body having sintered metal anode with an electrode lead, the anode having a sintered product produced from a tantalum powder having deagglomerated particles such that the product of the volume mean diameter in microns multiplied by the specific surface area measured in m.sup.2 /g is a number in the range of below about 25. Capacitors having a central electrode with the anode produced from a sintered product produced from a heat treated and oxidized tantalum powder wherein the oxidized particle size is greater than about 0.7 m.sup.2 /g. Capacitors are defined in terms of anodes produced from powders having specified ratios of Scott Bulk Density to surface area or ratio of die fill rate to surface area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.