• Minority Carrier Extraction in Germanium NASA/ADS

    The concentration of minority carriers in a sample can be effectively decreased below its equilibrium value by an extraction process in which, (a) the minority carriers in the sample are swept out by an electric field in a time < Get Price

  • Increasing germanium extraction from hydrometallurgical ...

    Previous studies at the US Bureau of Mines (USBM) have shown that only 70% to 80% of the germanium in domestic zinc process residues can be extracted during H2SO4 leaching. To increase germanium extraction, the USBM developed and researched the hypothesis that minor amounts of germanium and zinc silicate, present in zinc calcine, dissolve during the leaching stages of zinc processing, forming ...

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  • SOLVENT EXTRACTION OF GERMANIUM FROM ALUM .

    · SOLVENT EXTRACTION OF GERMANIUM FROM ALUM SOLUTION . United States Patent . Abstract: Germanium is extracted from an alum solution utilizing a hydrocarbon solution of a monosubstituted phosphoric acid as the extractant. The hydrocarbon solution is then back extracted with an aqueous oxalic acid solution to recover the germanium component.

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  • Extraction of germanium and gallium from coal fly ash .

    Extraction of germanium and gallium from coal fly ash and phosphorus furnace flue dust / By Roy F. Waters, Heine. Kenworthy and United States. ... Topics: Fly ash., Gallium., Germanium. ... please submit an Update/Correction/Removal Request. Useful links. Blog; Services;

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  • Extraction and flameless AAS determination of .

    The use of dicyclohexyl18crown6 methyl isobutyl ketone solution in extraction and flamelessatomic absorption spectrophotometry (AAS) determination of germanium in lignite fly ashes have been studied. Germanium is usually determined in lignites after the carbonaceous part of the sample has been burnt by a dry or wet ashing method. However, methods are described for direct determination of ...

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  • Iridium The MOST RARE Metal on Earth! YouTube

    Chemical Elements: /usr/novaelementscom?_trksid= NOVAELEMENTS: https:// Mel Science chemical sets: htt...

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  • Experimental Extraction of Ballisticity in Germanium ...

    Experimental Extraction of Ballisticity in Germanium Nanowire nMOSFETs ... Abstract—In this paper, we report the experimental extraction of ballistic transport parameters of highperformance Germanium Nanowire nMOSFETs (Ge NWTs) with lengths LNW = 40–100 nm, width WNW = 40 nm, and height HNW = 10 nm using temperaturedependent

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  • Firearms and Gun Handling of "Extraction" with Chris ...

    · According to Thayr Harris Extraction Second Unit Director / Stunt Coordinator: "The majority of the training (fight and weapons work) was done as a collective with the Stunt Team". For the final sequence (the shootout on the bridge) the crew invited a wellknown and experienced firearms instructor, Craig "Chili" Palmer.

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  • Preconcentration of Germanium(IV) on StyreneMaleic ...

    The styrenemaleic anhydride copolymer was chemically modi?ed, in the presence of formaldehyde, with 4amino2hydroxybenzoic acid or 4aminobenzoic acid giving sorbents S 1 and S 2, specific sorption behaviour of S 1 and S 2 towards germanium(IV) was examined and optimized, the preconcentrated germanium(IV) after desorption being spectrophotometrically quantified with bis(2,3 ...

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  • Germanium and Gallium Extraction from Gasification Fly .

    Germanium and gallium occur as water soluble Ge (hexagonalGeO 2 and GeS 2) and Ga oxide species in relatively high contents in the Puertollano Integrated Gasification with Combined Cycle (IGCC) fly ash. Both the speciation and contents of Ge and Ga

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  • Behaviors of gallium and germanium associated with zinc ...

    germanium concentration in the leach residue or solutions was found using the extraction separationbenzfluorenone spectrophotometry method. Oxygen pressure leaching procedure Synthetic aqueous solutions that contained zinc, manganese, sulfuric acid, ferrous sulfate and sodium ligninsulfonate were used as the leach solutions. The pressure acid

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  • NIOSHTIC2 Publications Search Germanium ...

    The Bureau of Mines investigated solvent extraction methods for recovering germanium from sulfuric acid leach filtrates. A new organic extractant system was developed that synergistically and selectively recovered germanium from these solutions. A continuous solvent extraction circuit was operated for over 150 h, extracting over 90 pct of the germanium from /l ge filtrates containing

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  • DED1 Process for the selective extraction of ...

    germanium process selective extraction selective extraction Prior art date 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 Application number DET Inventor Denise Epouse ...

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  • Gallium Wikipedia

    Gallium is a chemical element with the symbol Ga and atomic number 31. Elemental gallium is a soft, silvery metal at standard temperature and pressure; however in its liquid state it becomes silvery too much force is applied, the gallium may fracture is in group 13 of the periodic table, and thus has similarities to the other metals of the group, aluminium, indium, and ...

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  • Germanium Data Sheet Mineral Commodity Summaries 2020

    GERMANIUM (Data in kilograms of germanium content unless otherwise noted) Domestic Production and Use: In 2019, zinc concentrates containing germanium were produced at mines in Alaska, Tennessee, and Washington. Germaniumcontaining concentrates in Alaska and Washington were exported to a refinery in Canada for processing and germanium recovery.

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  • Firearms and Gun Handling of "Extraction" with Chris ...

    · According to Thayr Harris Extraction Second Unit Director / Stunt Coordinator: "The majority of the training (fight and weapons work) was done as a collective with the Stunt Team". For the final sequence (the shootout on the bridge) the crew invited a wellknown and experienced firearms instructor, Craig "Chili" Palmer.

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  • * Magnetite EPrints

    to accomplish the extraction of various minerals from fly ash. The technical literature is full of different methods of recovery of the metal values from coal ash. Of the elements present in coal ash, iron and aluminium have been examined most extensively for recovery. Of the minor and trace elements, extraction of gallium, germanium, uranium, and molybdenum have been investigated most ...

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