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Zone Refining. - Gold Refining Forum | Ingot | Phase …

Zone Refining. - Gold Refining Forum - Free download as PDF File (.pdf), Text File (.txt) or read online for free. zone refining

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Zone Refining of Raw Materials for Metal Halide ...

Zone Refining of Raw Materials for Metal Halide Scintillator Crys - Download as PDF File (.pdf), Text File (.txt) or read online.

Zone refining of plutonium metal - Springer

Most of the zone refining equipment was procured specifically for this experiment. The zone refining apparatus was constructed to fit in a vacuum chamber contained in a plutonium glovebox. The power supply used was a 75 kW Inductotherm unit that operated at about kHz. To move the plutonium rod at a very slow, controlled speed (1 or 2 …

Zone refining of SmBa2Cu3O7−x - ScienceDirect

A zone refining process was then employed to purify and densify the samples in air. Expensive gases such as argon or high purity nitrogen or complex equipment were not used. The Sm Expensive gases such as argon or high purity nitrogen or complex equipment were not used.

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4. Zone Refining :: JSC Germanium - …

4. Zone Refining. Zone melting is apllying for deep cleaning of p olycrystalline Germanium. It is the method of the horizontal directional crystallization which is carried out by crucible way. This method is based on various solubility of impurities in firm and liquid phases. During the ingot moving via the heater, the melted zone moves on ...

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ZONE REFINING OF MOLYBDENUM (Journal Article) | …

Abstract. The electron bombardment floating zone melting method was applied to refining Mo. Equipment design is described as well as the crystal structure and mechanical properties of the product.

A Thermal Analysis of the Horizontal Zone Refining …

A Thermal Analysis of the Horizontal Zone Refining of Indium Antimonide G. S. Roussopoulos, P. A. Rubini* School of Engineering, Cranfield University,

US3773565A - Zone refining - Google Patents

This ring was then mounted in electron beam welding equipment where, under vacuum, a zone at the bottom of the race groove was subjected to a 6OKV l4mA beam defocussed with 3mA Y" deflection, the beam passing over the ring at a speed of 5 inches per minute which was equivalent to a process time of about85 seconds for the ring concerned. …

PURIFICATION OF ZIRCONIUM BY SOLID STATE ... - …

The purrification of Zr by solid state electrolysis and zone reftning was studied. Equipment used in the investigations consisted of a vacuum system capable of operating below 1 x 10/sup -4/ mm of Hg with suitable power supplies to zone refine the material by electron bombardment and perform the ...

Preparation of high purity tellurium by zone refining

Preparation of high purity tellurium by zone ... indigenous process equipment and developed methods ... Preparation of high purity tellurium by zone refining 81

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DIRECTIVE NUMBER: CPL 03-00-004 EFFECTIVE DATE: June 7, 2007 SUBJECT: Petroleum Refinery Process Safety Management National Emphasis Program

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1951 - Development of Zone Refining

1951 - Development of Zone Refining William Gardner Pfann and Henry Theurer develop zone refining techniques for production of ultra-pure semiconductor materials. William Pfann and Jack Scaff with early zone-refining equipment.

Zone Refining Equipment | Products & Suppliers ...

Find Zone Refining Equipment related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Zone Refining Equipment …

Zone melting - Wikipedia

Zone melting (or zone refining or floating zone process or travelling melting zone) is a group of similar methods of purifying crystals, in which a narrow region of a crystal is melted, and this molten zone is moved along the crystal. The molten region melts impure solid at its forward edge and leaves a wake of purer material solidified behind ...

zone refining gold

Purification factor characterization of zone refining. Citation: Gold, Louis, Johnson, ia (1960/11)."Purification factor characterization of zone refining."

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Zone melting | industry |

Zone refining is the most important of the zone-melting techniques. In zone refining, a solid is refined by passing a number of molten zones through it in one direction. Each zone carries a fraction of the impurities to the end of the solid charge, thereby purifying the remainder. Zone refining was first described by the scientist

High-Speed Zone Refining | American Laboratory

High-Speed Zone Refining. Thursday, June 16, 2016 Tweet. Tweet. Facebook Email ; Julie DeCook. Zone refining is a process in which organic and inorganic compounds are purified. 1 Like distillation and gas and liquid chromatography, zone refining is dependent on the distribution of material between two phases. However, the distribution in zone ...

Zone Refining | RMD -

Zone Refining. A standard technique for purifying semiconductors is the zone refining process. A horizontal semi-cylinder of material is held in a boat made from an unreactive material such as quartz and a narrow molten zone is …

Zone Refining. - Gold Refining

Feb 19, 2011· a crystallophysical method of refining materials that consists in the movement of a narrow fusion zone along a long solid rod made of the material that is being refined. Nearly all industrially important metals, semiconductors, dielectrics, and inorganic and organic compounds— more than 120 substances—may undergo zone …

US3773565A - Zone refining - Google Patents

This ring was then mounted in electron beam welding equipment where, under vacuum, a zone at the bottom of the race groove was subjected ... Zone refining Country ...

Zone refining - Revolvy

A diagram of the vertical zone refining process used to grow single crystal HO ice from initially polycrystalline material. The convection in the melt is a result of water's density maximum at 4 °C. Silicon crystal in the beginning of the growth process Growing silicon crystal A high-purity (% = 5N ) tantalum single crystal, made by the floating zone …

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Zone refining of cadmium and r elated …

Zone refining equipment used for purification of cadmium was similar to that of tellurium (Munirathnam et al 2002), barring zone temperature which was mai ntai-

Zone refining of molybdenum - ScienceDirect

50 JOURNAL OF THE LESS-COMMON METALS VOL. 1 (I9) . ZONE REFINING OF MOLYBDENUM Armament Research and …

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US3433627A - Zone refining - Google Patents

In the conventional practice of zone refining, it is customary to form a plurality of discrete, linearly equispaced molten zones along the length of the body to be treated by means of a plurality of radiant, inductive or the like heaters which are slowly moved in one direction along the body a distance substantially equal to the spacing between ...