Tantalum Powder Agglomerated

Capacitor Powders

GAM produces three types of capacitor-grade tantalum powder: Angular, Nodular and Flake. The Angular or EB type powders are manufactured using an electron beam melting process. These powders contain both angular and flake shaped particles, which have been agglomerated to a specified surface area and capacitance range.

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US4009007A Tantalum powder and method of making the same

Tantalum powder capable of producing anodes of improved electrical capacitance is prepared by the addition of phosphorus-containing materials in amounts from about 5 to about 400 ppm based on elemental phosphorus. In one embodiment, the flow properties of the powder are also improved.

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US4441927A Tantalum powder composition Google Patents

An ingot-derived agglomerated tantalum powder composition comprising a select granular tantalum powder and including a critical proportion of a select flaked tantalum powder. US4441927A Tantalum powder composition Google Patents Tantalum powder composition Download PDF Info

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High CV Tantalum Capacitors Challenges and Limitations

High CV/g Powder Performance and Processing Tantalum capacitor anodes are pressed using agglomerated tantalum powder. The powder is first mixed with a binder material to provide the right powder flow and lubrication properties during pressing. From sieve analyses a 70kCV/g agglomerated powder mixed together with a binder does not

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WO2015081508A1 Method for agglomerating tantalum powder

A method for agglomerating tantalum powder comprises the following steps: 1) providing tantalum powder; 2) pre-agglomerating the tantalum powder by using the following mode: adding water into the tantalum powder to completely wet the tantalum powder, separating surplus water out, and pouring part or all of the surplus water out; and 3) agglomerating the tantalum powder by using the following

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tantalum powder agglomerated zonenzeebungalowverhuur

The composition of the present invention is an agglomerated, ingot-derived tantalum powder composition comprising a granular tantalum powder having a particle size less than about 10 microns and including about 20 to about 40 percent by weight of a flaked tantalum powder having BET surface area of about 0.20 to about 0.40 m.sup.2 /gm produced

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US4017302A Tantalum metal powder Google Patents

Improved, high-purity agglomerated tantalum powders characterized by exceptionally high green strength when pressed without using a carbonaceous binder into low density anodes and high electrical capacitance along with low direct current leakage and dissipation factor in the anodes after sintering. Such powder is produced by milling hydrided high-purity tantalum metal ingots or powder to a

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US4017302A Tantalum metal powder Google Patents

Improved, high-purity agglomerated tantalum powders characterized by exceptionally high green strength when pressed without using a carbonaceous binder into low density anodes and high electrical capacitance along with low direct current leakage and dissipation factor in the anodes after sintering. Such powder is produced by milling hydrided high-purity tantalum metal ingots or powder to a

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US5082491A Tantalum powder with improved capacitor anode

Ingot-derived and sodium-reduced agglomerated tantalum powders having improved flow characteristics and lead pull-out strength that find particular utility in manufacture of anodes for capacitors. Powder size distribution is in the range of -60 to +400 mesh, preferably -60 to +250 mesh, containing less than 5 wt % powder above the upper and below the lower range limits.

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Tantalum metal powder Fansteel Inc.

1977-04-12· The degassed tantalum powder was heated in vacuum (about 10-3 torr) to 1410° C. and held for one hour at temperature, then cooled under vacuum and finally under helium to ambient temperature to obtain agglomerated tantalum powder. d. The agglomerated powder was milled and screened using a 35 Mesh screen with any oversize material remilled and

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Tantalum an overview ScienceDirect Topics

The major consumer of tantalum is the capacitor production industry. About 60% of the total amount of tantalum currently produced is in the form of fine, agglomerated high-purity powder of capacitor grade. Tantalum capacitors have high volumetric efficiency and reliability.

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Tantalum powder composition (Patent) OSTI.GOV

Abstract. An ingot-derived agglomerated tantalum powder composition comprises a select granular tantalum powder and includes a critical proportion of a select flaked tantalum powder.

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US Patent for Tantalum powder with improved capacitor

Ingot-derived and sodium-reduced agglomerated tantalum powders having improved flow characteristics and lead pull-out strength that find particular utility in manufacture of anodes for capacitors. Powder size distribution is in the range of -60 to +400 mesh, preferably -60 to +250 mesh, containing less than 5 wt % powder above the upper and below the lower range limits.

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Powder metallurgical processing and metal purity: A case

2. Powder metallurgy of tantalum Tantalum is a reactive metal with high melting point (2997°C) and hence, powder metallurgy is the usual route of fabrication. One of the most common methods of pr o-ducing tantalum powder is the reduction of potassium fluoro tantalate, K2TaF 7,

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SEKOM Rhenium, Molybdenum, Tungsten, Tantalum powders

Tantalum powders. EB melted capacitor powder: 1, 2a, 2b, 3, 4a, 4b, 5a, 5b Tantalum powder for high-voltage capacitor BB-1, BB-2, BB-3 Tantalum powder of fine grain size TaPM Agglomerated Tantalum powder TaPA, TaPB. Chemical composition, %

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Tantalum powder Cabot Corporation

1990-07-10· An agglomerated flaked tantalum powder is compressed in a conventional pellet press without the aid of binders using an imbedded tantalum wire. Two samples of a tantalum powder, one weighing 1.29 g and the other weighing 1.33 g are separately introduced into a die of a pellet press having a diameter of 0.250 inch. The press is set up to press a

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Tantalum Wikipedia

Tantalum is a chemical element with the symbol Ta and atomic number 73. Previously known as tantalium, it is named after Tantalus, a villain from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant.

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Tantalum powder composition Cabot Corporation

1984-04-10· 6. The tantalum powder composition of claim 1 wherein the capacitance of an anode, pressed at 6.0 g/cc and sintered at 1600° C. is greater than about 7900 CV/g. 7. The tantalum powder composition of claim 1 wherein the composition powder is an electron beam ingot-derived agglomerated tantalum powder composition. 8.

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US Patent Application for Tantalum Powder for the

A tantalum powder consisting of agglomerated primary particle with a minimum primary particle dimension of 0.2 to 0.8 μm, a specific surface area of 0.9 to 2.5 m2/g and a particle size distribution determined to ASTM B 822 corresponding to a D10 value of 5 to 25 μm, a D50 value of 20 to 140 μm and a D90 value of 40 to 250 μm, wherein the powder does not comprise an effective content of

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The method of obtaining niobium and/or tantalum powders

The closest analogue to the invention in the part of the method is described in U.S. patent No. 4722756 way to obtain tantalum and/or niobium material, for example, powder, suitable for the manufacture of capacitors, by one-step recovery feedstock oxygen-active metal, selected from the group including the deposits, their alloys and mixtures, in

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Scrap Metal Determination and Disposal NES

EPA defines non-agglomerated tantalum powders as not scrap metal. However, EPA does recognize the dangers of tantalum powder. The concern is that the powder will ignite spontaneously causing danger to the recycling process and the employees involved (Scrap Metal Recycling). Therefore, when these powders are sent for recycling, they are

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(PDF) Extraction of Tantalum Powder via the Magnesium

The metallic tantalum powder was successfully synthesized via reduction of tantalum pentoxide (Ta2O5) with magnesium gas at 1073~1223 K for 10 h inside

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US Patent for Tantalum powder and method of making the

The agglomerated tantalum powder described in this patent also has improved flow characteristics as compared to prior powders. U.S. Pat. No. 3,825,802 discloses improvements in various properties of tantalum capacitors, including specific capacity, by the addition to the tantalum of any of several "dopants", including phosphorus. The range of dopant disclosed is from 0.47 to 2.71 atomic

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Tantalum powder and method of making same Cabot

1993-11-16· An agglomerated flaked tantalum powder is compressed in a conventional pellet press without the aid of binders using an imbedded tantalum wire. Two samples of a tantalum powder, one weighing 1.29 g and the other weighing 1.33 g are separately introduced into a die of a pellet press having a diameter of 0.250 inch. The press is set up to press a

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US Patent for Tantalum powder for the production of solid

A tantalum powder consisting of agglomerated primary particle with a minimum primary particle dimension of 0.2 to 0.8 μm, a specific surface area of 0.9 to 2.5 m2/g and a particle size distribution determined to ASTM B 822 corresponding to a D10 value of 5 to 25 μm, a D50 value of 20 to 140 μm and a D90 value of 40 to 250 μm, wherein the powder does not comprise an effective content of

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RCRA Guidance: February 24th U.S. Environmental Protection

2017-04-13· Finally, EPA notes that import or export non-agglomerated tantalum powder that exhibits a hazardous characteristic would be considered a RCRA

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Tantalum powder for the production of solid electrolyte

2011-03-01· A tantalum powder consisting of agglomerated primary particle with a minimum primary particle dimension of 0.2 to 0.8 μm, a specific surface area of 0.9 to 2.5 m 2 /g and a particle size distribution determined to ASTM B 822 corresponding to a D10 value of 5 to 25 μm, a D50 value of 20 to 140 μm and a D90 value of 40 to 250 μm, wherein the powder does not comprise an effective content

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