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Organic compound

A technology of suboxide and niobium oxide, applied in the fields of inorganic chemistry, niobium compounds, chemical instruments and methods, etc.

Inactive Publication Date: 2008-09-10
H C STARCK GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, the operating temperature of NbO-based capacitors is limited to about 125°C

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0098] Embodiment 1 (comparison)

[0099] 53.98% by weight of precursor A4(Nb) and 46.02% by weight of precursor Al(Nb 2 o 5 ) were evenly mixed together and heated to 1400°C in a hydrogen atmosphere. The product properties are shown in Table 1.

Embodiment 2

[0101] Precursor A4 (Nb) was mixed with 1.5 times the stoichiometric ratio (relative to the oxygen content) of magnesium and 5.4 parts by weight of NH 4 Cl (per 100 parts of Nb) was mixed evenly and put into the reactor. The reactor was then purged with argon and heated to 700°C for 90 minutes. After cooling, air was slowly filled into the reactor for passivation. After washing and rinsing with sulfuric acid, a nitrogen-doped niobium metal containing 9600-10500 ppm (9871 ppm on average) nitrogen was obtained. The oxygen content is 6724ppm.

[0102] Nitrogen-doped niobium was converted to NbO as described in Example 1. The product properties are shown in Table 1. The x-ray diffraction pattern of the powder is shown in figure 1 middle. Obviously, the Nb at 2Θ=38.5° indicated by the arrow can be identified 2 N(101) peak. Therefore, at least a portion of the doped N to crystalline Nb 2 N-phase form exists.

Embodiment 3

[0104] Repeat Example 2, except that the NH 4 The amount of Cl added was increased to 8.2 parts by weight. The average nitrogen content of niobium powder is 14730ppm. The oxygen content is 6538ppm. The product properties of this suboxide are shown in Table 1.

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Abstract

Disclosed is a niobium suboxide powder for the manufacture of capacitors with higher break down voltages, higher temperatures of operation and elongated lifetimes. The powder is doped with nitrogen which is at least partly present in the form homogeneously distributed, x-ray detectable Nb2N-crystal domains.

Description

technical field [0001] The present invention relates to niobium suboxide powders which can be used for manufacturing solid electrolytic capacitors, in particular to nitrogen-containing niobium suboxide powders. Background technique [0002] Solid electrolytic capacitors that can be used in mobile communication devices usually consist of a high surface area conductive carrier covered by a non-conductive niobium or tantalum pentoxide layer that takes advantage of the high stability and High dielectric constant, where insulating pentoxide layers can be produced with very constant thickness by electrolytic oxidation. Valve metals or conductive suboxides of valve metals (suboxides, NbO x ) as the carrier material. The support forming one of the electrodes of the capacitor (the anode) usually has a highly porous sponge-like structure, usually produced by sintering a very fine primary structure or a sponge-like secondary structure. The surface of the electrically conductive supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00
Inventor C·施尼特H·布鲁姆C·拉沃尔C·麦克瑞肯
Owner H C STARCK GMBH
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