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tantalum powder denko

TANTALUM POWDER FOR SINTERED CAPACITORS - SHOW

07/03/1972  SHOW DENKO KK. Primary Class: 428/402. Other Classes: 75/255, 419/23 . International Classes: B22F5/00; B22F1/00; ... Tantalum powder for electrolytic capacitors of the present invention is powder wherein tantalum particles have an average flakiness of 2-60, at least 80 percent by weight of said powder consisting of particles having a shorter breadth of 3 to 250μ, the powder being free from ...

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Capacitor-grade Tantalum Powder Production Capacity ...

25/01/2001  Showa Cabot Supermetals K.K. (SCSM), a joint venture between Showa Denko K.K. and Cabot Corporation of the United States, is expanding its production capacity for capacitor-grade tantalum powder to meet brisk demand for the product for use in cellular phones and mobile terminals (personal digital assistant:PDA). The expansion work at SCSM's Higashinagahara Plant in Fukushima

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US3647415A - Tantalum powder for sintered capacitors ...

Tantalum powder for electrolytic capacitors wherein tantalum particles in said powder have an average flakiness of 2 to 60, at least 80 percent by weight of said powder consisting of particles having a shorter breadth of 3 to 250 Mu and said powder being free from particles having a shorter breadth of above 500 Mu , and methods of preparing the same.

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Tantalum powder, −325mesh, 99.9 % trace metals 7440

Tantalum powder, −325 mesh, 99.9% trace metals basis Synonym: Ta CAS Number 7440-25-7. Empirical Formula (Hill Notation) Ta . Molecular Weight 180.95 . MDL number MFCD00011252. PubChem Substance ID 24855929. NACRES NA.23

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Tantalum - Wikipedia

Tantalum electrolytic capacitors exploit the tendency of tantalum to form a protective oxide surface layer, using tantalum powder, pressed into a pellet shape, as one "plate" of the capacitor, the oxide as the dielectric, and an electrolytic solution or conductive solid as the other "plate". Because the dielectric layer can be very thin (thinner than the similar layer in, for instance, an ...

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MANUFACTURING METHOD FOR AN IMPROVED

tantalum powder Prior art date 1993-04-26 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number DE69401112T Other languages German (de) English (en) Other versions DE69401112D1 (de Inventor Hongju Chang Current

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Tantalum Powder Tantalum Metal Powder Spherical ...

Tantalum has twice the density of steel, and it is highly ductile. It has the fourth-highest melting point of all metals and can form fragile and protective oxide layers for high-quality capacitors. Our powder also has a high surface area, great handling and flow properties.

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Formation of cubic tantalum nitride by heating hexagonal ...

01/07/1978  Tantalum powder (purity above 99.8%) obtained from Showa Denko KK was heated in a nitrogen atmosphere under normal pressure at 1200 for 30 h. After crushing the product into powder finer than 44 /-(m in size, it was heated in a nitrogen-argon plasma jet*. The plasma jet reactor is shown *0ptimum conditions were as follows: power input 4 kW (50 V, 80 A), N3 flow rate 5 l min"1, Ar flow

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Powder composition for capacitor, sintered body using the ...

A powder composition for a capacitor comprising a tantalum or niobium and a compound having a silicon-oxygen bond, at least a part of which may be nitrided and which has an average particle size of fr

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SDK Transfers SCSM Shares to Cabot News Releases

31/01/2002  Meanwhile, Cabot is committed to further strengthening its tantalum powder operations. Profile of Showa Cabot Supermetals K.K. Capital: ¥434 million : Shareholders: Showa Denko K.K. (50%) Cabot International Capital Corporation (50% ) Main business: Production and sale of capacitor-grade tantalum powder, tantalum ingot and mill products; Import and resale of tantalum mill products,

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SINTER OF NIOBIUM FOR CAPACITOR, AND METHOD OF

SHOWA DENKO KK (Tokyo 105-8518, JP) International Classes: H01G9/042; B22F1/00; C22C27/02; H01G9 /052. European Classes: ... Download PDF EP1137021 . Domestic Patent References: EP0665302: Nitriding tantalum powder. Foreign References: WO/1998/019811A: NIOBIUM POWDERS AND NIOBIUM ELECTROLYTIC CAPACITORS: JP60152016A: 4084965: Columbium powder and

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The Basics Benefits of Tantalum Ceramic Capacitors ...

Tantalum capacitors achieve high capacitance values through a combination of factors, including a tantalum pentoxide (Ta 2 O 5, εr = 27) dielectric, a large plate area (A), and a very thin dielectric thickness (d). The positively charged dielectric plate of a tantalum capacitor is formed from pure elemental grade tantalum powder that is pressed and sintered into a pellet. These pellets are ...

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Recent Technology of Powder Metallurgy and Applications

Powder metallurgy (P/M) is a materials processing technology to create new materials and parts by diffusing different metal powders as raw ingredients through the sintering process. Products are created by P/M using the basic process shown in Figure 1. The features of P/M can be seen in the following five areas: 1) alloys can be created from high melting point metals, including tungsten ...

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NIOBIUM POWDER, NIOBIUM GRANULES, NIOBIUM

SHOWA DENKO KK (Tokyo 105-8518, JP) International Classes: B22F9/04; B22F1/00; H01G9/052. European Classes: ... MANUFACTURING METHOD FOR TANTALUM POWDER OR NIOBIUM POWDER: JP2004500480A: 2003089197: Other References: F. HONDA AND T. SAITO: "Tribochemical characterization of the lubrication film at the Si3N4/Si3N4 interface sliding in aqueous solutions"

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Petrochemicals Organic Chemicals

Showa Denko K.K. 9 Petrochemicals CONSOLIDATED BUSINESS RESULTS (Millions of yen) 2002 2001 Difference Rate of change (%) Sales 227,753 233,647 -5,894 -2.5% Operating income 9,955 6,130 +3,825 +62.4% In 2002, sales of olefins and organic chemicals fell, while sales of plastics rose as the full year of Showa Highpolymer Co., Ltd.’s consolidation more than offset the sale in late 2001 of over ...

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2001 News Releases SHOWA DENKO K.K.

Dec.13 SDK Takes Additional Cost Reduction Measures; Dec.13 SDK Makes Progress in 2nd Year of Cheetah Project; Dec.11 Nano-Particle UV-Shielding Material for Cosmetics; Dec.10 SDK Develops New Extruded Aluminum Heat Sinks; Dec.06 SDK Ready for Mass Production of Vapor-Grown Carbon Nanofiber; Dec.05 Showa Aluminum Can Certified as Meeting ISO 14001 9002; Dec.03 SDK

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NIOBIUM POWDER, SINTERED COMPACT THEREOF AND

A niobium powder for use in a capacitor, characterized in that it comprises a niobium powder being partially oxydized and partially nitrized which has a mass ratio of the amount of nitrogen to that of oxygen of 1/45 or more; a sintered compact of the niobium powder; and a capacitor using the sintered compact. A conventional niobium capacitor has had low reliability, since a conventional ...

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Formation of cubic tantalum nitride by heating hexagonal ...

01/07/1978  Tantalum powder (purity above 99.8%) obtained from Showa Denko KK was heated in a nitrogen atmosphere under normal pressure at 1200 for 30 h. After crushing the product into powder finer than 44 /-(m in size, it was heated in a nitrogen-argon plasma jet*. The plasma jet reactor is shown *0ptimum conditions were as follows: power input 4 kW (50 V, 80 A), N3 flow rate 5 l min"1, Ar flow

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Processing of Ta Powder and Mill Products at Showa

Cabot Co., Ltd. U.S.A. and Showa Denko K.K. and was established in March 1972. Tantalum electrolytic capacitors, which constitute an indispensable element of electronic circuits for high-reliability equipment, have been finding wider applications in recent years. Our capacitor-grade tantalum powder and wire have been receiving favors from respective tantalum capacitor manufactures for many ...

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Recent Technology of Powder Metallurgy and Applications

Powder metallurgy (P/M) is a materials processing technology to create new materials and parts by diffusing different metal powders as raw ingredients through the sintering process. Products are created by P/M using the basic process shown in Figure 1. The features of P/M can be seen in the following five areas: 1) alloys can be created from high melting point metals, including tungsten ...

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M MESSAGE FROM THE MANAGEMENT

tantalum powder was terminated. As a result, sales of electronic materials as a whole decreased. In the Inorganic Materials Segment, sales rose 4.3%, to ¥56.9 billion, but operating income was down 61.0 %, to ¥1.4 billion. Sales from ceram- ics operations decreased owing to a continued stagnation in the customer industries, which led to decreases in both sales volumes and selling prices ...

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US Patent for Method for evaluating tantalum carbide ...

07/11/2017  Tantalum carbide has high hardness and excellent heat resistance. Tantalum carbide has an extremely high melting point of 3,880° C. Therefore, tantalum carbide is used as a material for various members which are used at high temperatures. For example, tantalum carbide is used for components of cutting tools, coatings of carbon heaters, concentrating solar cells, or members of semiconductor ...

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Petrochemicals Organic Chemicals

Showa Denko K.K. 9 Petrochemicals CONSOLIDATED BUSINESS RESULTS (Millions of yen) 2002 2001 Difference Rate of change (%) Sales 227,753 233,647 -5,894 -2.5% Operating income 9,955 6,130 +3,825 +62.4% In 2002, sales of olefins and organic chemicals fell, while sales of plastics rose as the full year of Showa Highpolymer Co., Ltd.’s consolidation more than offset the sale in late 2001 of over ...

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2001 News Releases SHOWA DENKO K.K.

Dec.13 SDK Takes Additional Cost Reduction Measures; Dec.13 SDK Makes Progress in 2nd Year of Cheetah Project; Dec.11 Nano-Particle UV-Shielding Material for Cosmetics; Dec.10 SDK Develops New Extruded Aluminum Heat Sinks; Dec.06 SDK Ready for Mass Production of Vapor-Grown Carbon Nanofiber; Dec.05 Showa Aluminum Can Certified as Meeting ISO 14001 9002; Dec.03 SDK

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High-quality-factor tantalum oxide nanomechanical ...

High-quality-factor tantalum oxide nanomechanical resonators by laser oxidation of TaSe 2 Santiago J. Cartamil-Bueno1 ... Ta powder, 99.99% trace metals basis and Se powder, –100 mesh, 99.99% trace metals basis are used. Powdered starting materials are intimately mixed, placed inside an evacuated quartz ampoule and reacted at 900 °C for 9 days. The resulting free-flowing glittery grey ...

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US Patent for Niobium powder for capacitor, sintered body ...

A nobium powder for capacitors, which contains from 0.05 to 20% by mass of niobium monoxide crystal and from 0.05 to 20% by mass of hexaniobium monoxide crystal; a sintered body thereof; and a capacitor fabricated from the sintered body as one part electrode, a dielectric material formed on the surface of the sintered body, and another part provided on the dielectric material.

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CiNii 論文 - スパークソース質量分析法による高純度タン

The sample electrodes were molded with tantalum powder and compressed at a pressure of 10 t. The electrodes molded with added graphite powder were unsatisfactory with respect to the electric conductivity and the mechanical strength under load. The increase of the spark source voltage from (2~4.5) kV caused the increase of ion intensity for the elements, F, Si, Cl, Ca, Ti, Cr, Mn, Fe, Ni, Nb ...

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