Unlock instant, AI-driven research and patent intelligence for your innovation.

Capacitor anode formed from a powder containing coarse agglomerates and fine agglomerates

A technology of agglomerates and anodes, which is applied in the direction of capacitor electrodes, capacitors, electrolytic capacitors, etc., and can solve problems such as the limitation of the ability to penetrate the anode

Inactive Publication Date: 2010-05-26
AVX CORP
View PDF40 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the powder compression density exceeds 6.5g / cm 3 , the ability to infiltrate the anode is limited in subsequent processing steps

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Capacitor anode formed from a powder containing coarse agglomerates and fine agglomerates
  • Capacitor anode formed from a powder containing coarse agglomerates and fine agglomerates
  • Capacitor anode formed from a powder containing coarse agglomerates and fine agglomerates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] It will be appreciated by those skilled in the art that the discussion herein is a description of exemplary embodiments only and is not intended to limit the broader aspects of the invention as embodied by the exemplary embodiments.

[0013] In general, the invention is directed to a pressed anode formed from a conductive powder comprising a plurality of coarse and fine agglomerates. The agglomerates have a high specific charge, for example about 25,000 microfarad*volts per gram (“μF*V / g”) or more, in some embodiments about 40,000 μF*V / g or more, in some In embodiments about 60,000 μF*V / g or more, in some embodiments about 70,000 μF*V / g or more, in some embodiments about 80,000 to about 200,000 μF*V / g or more many. Examples of compounds that form such agglomerates include valve metals (that is, metals capable of oxidation) or compounds based on valve metals, such as tantalum, niobium, aluminum, hafnium, titanium, their alloys, their oxides, their nitrides, etc. For e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

A pressed anode formed from an electrically conductive powder that contains a plurality of coarse agglomerates and fine agglomerates is provided. The fine agglomerates have an average size smaller than that of the coarse agglomerates so that the resulting powder contains two or more distinct particle sizes, i.e., a ''bimodal'' distribution. In this manner, the fine agglomerates can effectively occupy the pores defined between adjacent coarse agglomerates (''inter-agglomerate pores''). Through the occupation of the empty pores, the fine agglomerates can increase the apparent density of the resulting powder, which improves volumetric efficiency.

Description

[0001] related application [0002] This patent application claims priority from US Provisional Patent Application Serial No. 61 / 102,900, filed October 6, 2008, which is hereby incorporated by reference in its entirety. Background technique [0003] Tantalum capacitors have greatly contributed to the miniaturization of electronic circuits and enabled these circuits to be used in extreme environments. However, driven by the miniaturization of electronics, the volumetric efficiency (the product of the capacitance C and the operating voltage V, divided by the volume of the capacitor) is still relied on to further improve the volumetric efficiency of this type of capacitor. To date, increased volumetric efficiency has mostly been achieved by using powders with high capacitance per gram and high surface area. Another possibility is to increase the compacted density of the powder. However, when the powder compression density exceeds 6.5g / cm 3 , the ability to infiltrate the anod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/15
CPCH01G9/0029H01G9/048B22F3/10H01G9/0525H01G9/042H01G9/15
Inventor 伊恩·平威尔
Owner AVX CORP