recovery of tantalum sintered compact from used tantalum

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Recovery of Tantalum Sintered Compact from Used Tantalum ...

Recovery of tantalum resource from used tantalum capacitor in electric equipment is important because the production of tantalum have not been stable for the price and the quantity. However, recovery of tantalum sintered compact from tantalum capacitor is difficult since the compact strongly covered with the flame...

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US20130014611A1 - Method for recovering tantalum - Google Patents

When the method for recovering tantalum of the present invention is applied to tantalum sintered compact collected from tantalum capacitors, the target tantalum capacitors include not only used tantalum capacitors but also unused tantalum capacitors. The unused tantalum capacitors mean, for example, defective tantalum...

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Niobium and Tantalum - prometia

Preparing synthetic concentrate. 3. Recovering Niobium directly from medium-grade slags. Recycling of iron and steel scrap. Scrap is collected by scrap dealers and processed into a physical form and chemical composition that can be consumed by steel mills in their furnaces. Baling presses are used to compact the scrap...

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WO2011129565A2 - Method for producing tantalum (ta) powder ...

The present invention relates to a method for producing tantalum (Ta) powder from a waste tantalum (Ta) target using eutectic alloys. ... wet process to produce the target by the sintering method, the pressure by using a fine powder uniformly control is applied in order to obtain a high density sintered body as compared with...

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Chinese Hospital Uses 3D Printed Tantalum Implant in Successful ...

Nov 27, 2017 ... I remember years ago, when my grandfather had double knee replacement surgery, it took him a pretty long time to recover. But, thanks to 3D printing technology, the recovery time for this type of implant surgery has gone way down. According to CQNEWS.net, a website based out of the Chinese...

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Download a draft of the report - The Institute of Materials, Minerals ...

2.15 TANTALUM. 23. 2.16 TITANIUM. 24. 2.17 TUNGSTEN. 26. 3. SUMMARY OF PRODUCING COUNTRIES, APPLICATIONS AND RECYCLING. 28 .... recycled. Antimony is recovered during the recycling/refining process and is sold as high antimony-lead ingots. (G). Flame retardant. Flame retardancy is often an essential...

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Polymer Tantalum Capacitors for Advanced High ... - ESCIES

Tantalum capacitors have been used for decades in many applications for their reliability, long service life and stability. ... Tantalum capacitor is produced by using tantalum powder which is pressed with embedded tantalum wire and sintered. ... conduction and efficient cooling of capacitor body under electrical stress.

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Development of a Recycling Process for Tantalum from Capacitor ...

remove SiO2. ・ By leaching with nitric acid, impurities in the sample (mainly Cu) were removed. ・ Finally, tantalum in the capacitor recovered as tantalum oxide (Ta2O5). ・ Sintered tantalum electrodes are tightly covered in epoxy resin. Oxidized capacitors. TaOx , SiOx, MjOx. Recovery Process. Thermocouple. Niobium.

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Are tantalum capacitors safe for use in new designs? - Electrical ...

Feb 10, 2014 ... When used in circuits that can provide substantial energy to the capacitor failure can lead to thermal run-away with flame and explosion of the ... Tantalum caps are typically made by sintering tantalum granules together to form a continuous whole with an immense surface area per volume and then forming...

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Manufacturing of tantalum capacitors - YouTube

Nov 30, 2010 ... Sintering also drives off most of the impurities. The "pellets" are then soldered to a metal band called stringer. The stringers are isolated from the capacitor's body with the help of Teflon washers. Later they are used to form the leads of the tantalum capacitor. The next stage is the formation of the dielectric...

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Biocompatibility and osteogenic properties of porous tantalum

Jan 23, 2015 ... The porous tantalum selected was −250 mesh pure tantalum powder with a certain amount of additives and added sponge carrier to control the pore diameter of porous materials, porosity and pore distribution, and approved by slip-casting forming and through 1,500–2,100°C high temperature sintered and...

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Tantalum Protective Thin Coatings by Molten Salt Electrolysis for the ...

tantalum with other high-performance materials used in the Chemical Process. Industry (CPI) is ..... (body centred cubic. 3269. 135. (293 K). 54.4. (293 K). 6.6. (polycrystalline). (polycrystalline). (polycrystalline). (polycrystalline) lum metal exhibits numerous physical properties ..... tantalum recovery in fused salt by electrolysis.

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O PORTAL DO GEÓLOGO - O SITE DA GEOLOGIA E MINERAÇÃO ...

Tantalum ores are found primarily in Australia, Canada, Brazil, and central Africa, with some additional quantities originating in southeast Asia. The average yearly growth rate of about 8 to 12% in tantalum demand since about 1995 has caused a significant increase in exploration for this element. Tantalum minerals with...

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Localization Phenomena in Disordered Tantalum Films - MDPI

Jul 7, 2017 ... Using dc transport and wide-band spectroscopic ellipsometry techniques we study localization phenomena in highly disordered metallic β -Ta films grown by rf sputtering deposition. The dc transport study implies non-metallic behavior (d ρ /dT < 0), with negative temperature coefficient of resistivity (TCR).

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What are Refractory Metals - PickPM

metals, only five are widely used: Tungsten, Molybdenum, Niobium, Tantalum and Rhenium. Page 4. 4. All but Rhenium have a body-centered cubic structure. Despite the fact that ..... processing, or into final shapes, powders are pressed and sintered in hydrogen atmospheres at temperatures of. 1800oC (3270oF) or higher.

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Schrade Fred adtke - DSpace@MIT - Massachusetts Institute of ...

melting point. The heating is done in vacuum in the case of tantalum. Drastic cold work, followed by further sintering and forging, serve to densify the pure metal and eliminate porosity. The arc fusion method utilizes the heat of the electic arc to melt a pressed compact of the powdered metal. Initial at. t tempts to prepare alloys...

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Preparation of high-purity tantalum ethoxide by vacuum distillation

Abstract: Effects of reflux ratio, water addition and content of water in ethanol on the purity and yield of tantalum ethoxide during vacuum distillation were ... Tantalum ethoxide is mainly used for the production of thin oxide films, adopted in optical, ... equipments, bad work condition, low recovery ratio and toxic diluted solvent...

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Airiti Library華藝線上圖書館_鉭質電容器中鉭資源再生技術研究

“Recovery of Tantalum Sintered Compact from Used Tantalum Condenser Using Steam Gasification with Sodium Hydroxide.”, APCBEE Procedia, vol.10, pp. 182-186, 2014. 連結:; [23] B. Wu, H. Shang, J.K. Wen,. “Sulfuric acid leaching of low-grade refractory tantalum–niobium and associated rare earths minerals in Panxi...

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2% THE WELDING AND BRAZING OF THE ... - Semantic Scholar

on the readily available metals iron, nickel and chromium are already being used near their useful limits and ... elements are the refractory metals, niobium, tantalum, molybdenum and tungsten, which form a closely .... during the sintering, so that it continues during welding, causing porosityl3. How- ever commercially pure...

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Capacitor types - Wikipedia

So the most-used names are simply historical. The most common kinds of capacitors are: Ceramic capacitors have a ceramic dielectric. Film and paper capacitors are named for their dielectrics. Aluminum, tantalum and niobium electrolytic capacitors are named after the material used as the anode and the construction of the...

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ELECTROCHEM TECHNOLOGIES & MATERIALS INC. - NEWS

The product is extensively used by our customers in the following niche markets for more information (Tungsten and Tantalum Chemicals). Precurssor for the .... This confirmed efficient recovery of vanadium and iron values using the jointly owned Vanadiumcorp-Electrochem patent pending technology. Consistent yields...

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钽电解电容器 - 宁夏东方钽业股份有限公司

Tantalum capacitors with Xingri Brand are sold well worldwide and have gained a high reputation, widely used in such high-end applications as aerospace and ..... Except for sintered solid tantalum chip capacitor as dominant product,Ningxin Xingri Electronics Co., Ltd.also produce .... Do not touch the iron tip to the body of.

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The main purpose of tantalum, niobium_Taicang Xin Chang ...

Nov 12, 2014 ... 5 tantalum carbide as carbide is mainly used as an additive carbide cutting tools, tools, molds, and wear and corrosion structural member, TaC may be ... the capacitor is easy to accurately and conveniently controlled anodic oxidation process, while tantalum powder sintered compact can be obtained a...

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A Review of Technology of Metal Recovery from Electronic Waste

aration techniques followed by metallurgical treatment is the best proposition for the recovery of metals. Detailed technology development needs to be taken up for the recycling of ... 0.01%, others (bismuth, antimony, tantalum, etc.) ...... voltage supply of less than 180 V. It can also be used for fused CFLs (compact fluorescent.

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mil-prf-39006e [capacitors, fixed, electrolytic (nonsolid electrolyte ...

This specification covers tantalum, electrolytic (nonsolid electrolyte), fixed capacitors. (polarized and ... Part Per Million (ppm) quality system is used for assessing the average outgoing quality of ER capacitors supplied to ... MIL~C-3965 - Capacitors, Fixed, Electrolytic (Nonsolid Electrolyte), Tantalum, General. Specification...

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Dislocation structures in single crystal tungsten and tungsten alloys

The primary effect of rhenium additions is to produce edge dipoles in the wake of screw dislocations. Tantalum had a lesser effect on dislocation substructure. I. 17. .... the sintered and swaged rods, while seeding to the desired orientation was accomplished ... crystals, shaded area, used in this investigation for (101). [IH] slip...

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Novel Titanium-Tantalum Alloy for Better Orthopaedic Implants | IPI ...

4 days ago ... Technology Overview. Titanium alloys such as Ti6Al4V and Ti6Al7Nb are widely used alloys in biomedical applications due to their combination of biocompatibility and mechanical properties. However, there has been growing concerns about the long term harmful effects of vanadium and aluminium ions...

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metallic cobalt particles (with or without tungsten carbide) - IARC ...

For an accurate determination of cobalt concentration in body fluids, it is necessary to use blood collection ..... tantalum carbide are used as structural materials in extremely high temperatures or in corrosive atmospheres. .... pressure is applied at the sintering temperature when the metallic binder is still molten, resulting in...

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Refractory-metals: usage and joining practice - Welding Advisers

Finer grain size of powder products facilitates hot working operations following compaction and sintering. Conversely Refractory-metals are never fabricated by casting because of their high melting point. Niobium is widely used in spacecraft propulsion systems; Tantalum is used for capacitors and for chemical processing...

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Pressureless sintering of single-phase tantalum carbide and ...

This work presents the results of studies on the preparation of single-phase polycrystalline tantalum carbide and niobium carbide. ... and therefore relatively low temperatures such as for the compounds with one of the highest melting points; TaC – 3985°C and NbC – 3600°C. Only carbon as a sintering additive was used.

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Spectra, magnetic susceptibilities and structure of some halogen ...

Torp, Bruce Alan, "Spectra, magnetic susceptibilities and structure of some halogen complexes of niobium (IV) and tantalum (IV) ". (1964). ..... decomposition could not be used since free iodine liberated during the course of the reaction could not be quantitatively recovered. In this procedure a weighed amount of iodine.

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Tantalum | Article about tantalum by The Free Dictionary

Tantalum was used in the filaments of electric light bulbs and electronic tubes but has been largely replaced by tungsten for these uses. It is often alloyed with other metals; it imparts strength, ductility, corrosion resistance, and a high melting point. Because it is unaffected by body fluids and causes no adverse tissue...

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tantalum carbide coatings: Topics by Science.gov

Here, we propose a production technique for ultra-thick (50–200 μmt) tantalum carbide (TaC) protective coatings on graphite substrates, which consists of TaC slurry application and subsequent sintering processes, i.e., a wet ceramic process. Structural analysis of the sintered TaC layers indicated that they have a dense...

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compaction, sintering behavior, properties and medical ... - De Gruyter

Dec 6, 2017 ... Keywords: Porous metallic biomaterials, Powder Metallurgy (P/M) techniques, Compaction-Sintering behavior, Biomaterias properties, Medical applications. 1. INTRODUCTION. Metallic biomaterials such as stainless steel, magnesium, tantalum, titanium etc, have been widely used in many medical...

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What is Niobium Found in - Stanford Advanced Materials

Jun 27, 2017 ... The method uses the affinity of carbon to oxygen more than that of niobium to oxygen, and uses carbon as reducing agent to restore Nb2O5 to ... In order to obtain the best purification effect, several refining methods, such as the niobium strip sintered by sintering, are used in the refining process, and then...

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High-strength fully porous biomaterials for bone ... - McGill University

strength is almost 5 times stronger than that of tantalum foam, an existing fully porous biomaterial used in ... The change of strain between intact and implanted femur is used as a proxy for stress shielding. Femurs ...... natural bone to increase the service life, improve recovery time, and reduce the risk of revision surgeries.

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Heat excHangers

TANTALUM. ZIRCONIUM. NICKEL. ALLOYS. PTFE. HEAT. EXCHANGERS. Blocks, cUBIc and tUBes. rUptUre dIscs. tantalUm small parts. Blocks and tUBes ... several design tools are used to provide thermal- ... the german notified Body (tÜV sÜD) has tested and determined the maximum temperature and mechanical.

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Melting temperatures of MgO under high pressure by micro ... - Nature

Jun 5, 2017 ... high pressure and temperature, which have been used to constrain the formation of the deep magma ... recent developments of this technology using sintered polycrystalline diamond anvils expanded the ...... plastic flow from body-centred-cubic tantalum before melting. Nat. Mater. 8,. 223–228 (2009). 40.

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Review of High-Temperature Recovery of Rare Earth (Nd/Dy) from ...

Mar 14, 2016 ... Depending on the form of the starting material (sludge or scrap), there are different routes that can be used to recover neodymium from secondary sources, ranging from hydrometallurgical (based on its primary production process), electrochemical to pyrometallurgical. Pyrometallurgical routes provide...

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Recuperation_of_Critical Metals in Flanders_research_paper_15

May 15, 2015 ... Underneath 12 opportunities are listed. They are derived from an extended literature review on possible next steps in collection, preprocessing and recycling of critical metals. There are many boundary conditions for the recycling of the here described opportunities, boundary conditions which to be further...

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