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Letteratura scientifica selezionata sul tema "Tellurium – Metallurgy"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 10 febbraio 2022

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Articoli di riviste sul tema "Tellurium – Metallurgy"

1

Guo, Ya Fei, Nan Zhang, Dong Chan Li, Fa Mang Tang, and Tian Long Deng. "Tellurium Recovery from the Unique Tellurium Ores." Advanced Materials Research 549 (July 2012): 1060–63. http://dx.doi.org/10.4028/www.scientific.net/amr.549.1060.

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Abstract (sommario):

Generally, along with the rapid economic development in our country, the requirement of mineral resource is gradually increasing. Compared with the traditional metallurgy, the biohydrometallurgy has the merit of light damage of environment, low cost, and a few investments, and then it can treat with very low-grade ores even industrial disposals. Since the discovery of scattered elemental tellurium deposit in China, the development and utilization of this unique independent tellurium ores were studied. In this paper, firstly, the progresses on tellurium recovery process from the unique telluriu

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2

Gelbstein, Y., Z. Dashevsky, R. Kreizman, Y. George, M. Gelbstein, and M. P. Dariel. "Annealing Effects on Powder Metallurgy Based Pb_1-xSn_xTe Materials for Thermoelectric Applications." Key Engineering Materials 336-338 (April 2007): 860–63. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.860.

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Abstract (sommario):

Lead tin telluride based alloys are known p-type materials for thermoelectric applications, in the 50-600oC temperature range. These alloys combine desired features of mechanical and thermoelectric properties. The electronic transport properties of PbTe and Pb1-xSnxTe materials may be strongly dependent on the preparation technique. Powder metallurgy process is known to introduce defects and strains, that may alter carrier concentration. Under such non-equilibrium conditions the thermoelectric properties are instable at the operating temperature. An appropriate annealing treatment can eliminat

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3

Ren, Wei, Xue Quan Liu, Xiao Lin Wang, and Hong Yi Jiang. "Thermoelectric Properties of Bismuth Telluride Based Materials Prepared by Powder Metallurgy Processing." Key Engineering Materials 336-338 (April 2007): 864–67. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.864.

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Abstract (sommario):

Polycrystalline samples of Bi2Te3 based alloys were prepared by powder metallurgy processing including a melting-grinding and a sintering procedure of compacted pellets. Two sintering procedures as hot-pressing and spark plasma sintering (SPS) were employed. The thermoelectric properties and mechanical strength were measured in all case. Thermoelectric properties for p-type (Bi0.25Sb0.75)2Te3 and n-type Bi2(Te0.2Se0.8)3 changed with sintering temperature in both sintering methods. Mechanical strength and relative density increase with sintering temperature in two sintering procedures. The resu

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4

Vallasek, Stefan I., Zsolt Veres, András Roósz, János Szőke, Péter Szirovicza, and Pál Bárczy. "Production of Single Crystal Thermoelectric Bismuth Telluride Alloys." Materials Science Forum 659 (September 2010): 263–68. http://dx.doi.org/10.4028/www.scientific.net/msf.659.263.

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Abstract (sommario):

Thermoelectric (TE) semiconductor materials are widely used for miniaturized versatile cooling devices in a wide spectrum of equipments and energy generation in space vehicles. The bismuth telluride pseudobinary alloy family presents the best characteristics for room temperature TE cooling applications. Using appropriately oriented single crystals instead of the well known polycrystalline materials made by powder metallurgy methods, the efficiency of the TE device (Thermoelectric Cooler – TEC or Thermoelectric Generator – TEG) could be almost doubled. For having good quality TE material it is

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5

Li, Tse-Hsiao, Jenn-Dong Hwang, Hsu-Shen Chu, Chun-Mu Chen, Chia-Chan Hsu, Chien-Neng Liao, Hsiu-Ying Chung, Tsai-Kun Huang, Jing-Yi Huang, and Huey-Lin Hsieh. "Preparation and evaluation of the n-type PbTe based material properties for thermoelectric generators." MRS Proceedings 1490 (2013): 179–84. http://dx.doi.org/10.1557/opl.2013.123.

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Abstract (sommario):

ABSTRACTOwing to energy conservation of waste heat, Lead telluride, PbTe, based materials have promising good thermoelectric properties around a range of middle temperature (Fig. 1, from 300 to 600°C), due to their high melting point, fine chemical stability, and the high figure of merit Z. The general physical properties and factors affecting the figure of merit have been reviewed. This research is focused on the n-type of PbTe materials and collocated with analysis of densities, hardness, elastic modulus, and thermoelectric properties thermoelectric figure of merit ZT=GS2T/κ (where G is elec

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6

Imamaliyeva, Samira Zakir. "New Thallium Tellurides with Rare Earth Elements." Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 22, no. 4 (December 15, 2020): 460–65. http://dx.doi.org/10.17308/kcmf.2020.22/3117.

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Abstract (sommario):

Compounds of the Tl4LnTe3 (Ln-Nd, Sm, Tb, Er, Tm) composition were synthesized by the direct interaction of stoichiometric amounts of thallium telluride Tl2Te elementary rare earth elements (REE) and tellurium in evacuated (10-2 Pa) quartz ampoules. The samples obtained were identified by differential thermal and X-ray phase analyses. Based on the data from the heating thermograms, it was shown that these compounds melt with decomposition by peritectic reactions. Analysis of powder diffraction patterns showed that they were completely indexed in a tetragonal lattice of the Tl5Te3 type (space g

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Tesi sul tema "Tellurium – Metallurgy"

1

Bello, Yusuf O. "Tellurium and selenium precipitation from copper sulphate solutions." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95895.

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Abstract (sommario):

Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The copper sulphate leach solutions produced during the final pressure leach stages in base metal refinery processes contain low concentrations of other precious metals (OPMs, namely Rh, Ru and Ir ) and impurities in addition to the base metals (BMs) of interest. Se and Te impurities, in particular, must be removed from the leach solution before it is fed to copper electrowinning because these species have adverse effects on electrowinning efficiency. Currently, these elements are being precipitated from the leach solution w

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2

Hall, Bradley Devin. "Powder processing, powder characterization, and mechanical properties of LAST (lead-antimony-silver-tellurium) and LASTT (lead-antimony-silver-tellurium-tin) thermoelectric materials." Diss., Connect to online resource - MSU authorized users, 2008.

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Abstract (sommario):

Thesis (M.S.)--Michigan State University. Materials Science and Engineering, 2008.<br>Title from PDF t.p. (viewed on Aug. 7, 2009) Includes bibliographical references (p. 151-159). Also issued in print.

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3

Johnston, Murray. "Thermodynamics of selenium and tellurium in molten metallurgical slags and alloys." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0064.

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Abstract (sommario):

There are a number of impurity elements present in sulphide ores that can have a deleterious effect on the properties of the final copper metal product. In this thesis, an equilibrium distribution technique was used to determine the thermodynamic behaviour of selenium and tellurium in molten slags used in copper production. Calcium ferrite based slags and copper or silver alloy were equilibrated in magnesia crucibles at temperatures of 1200 to 1400 °C and oxygen partial pressures of 10-11 to 10-0.68 atm. Under conditions typical of those employed during copper converting, the minor elements we

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4

Meier, Michael. "Purification of Cd, Zn and Te for CdZnTe growth." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1693.

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Capitoli di libri sul tema "Tellurium – Metallurgy"

1

Ren, Wei, Xue Quan Liu, Xiao Lin Wang, and Hong Yi Jiang. "Thermoelectric Properties of Bismuth Telluride Based Materials Prepared by Powder Metallurgy Processing." In Key Engineering Materials, 864–67. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.864.

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Atti di convegni sul tema "Tellurium – Metallurgy"

1

Mahajan, S. K., and J. Parashar. "Frequency upconversion in Er3+ doped tungsten tellurite glass containing Ag nanoparticles." In PROCEEDINGS OF THE INTERNATIONAL SEMINAR ON METALLURGY AND MATERIALS (ISMM2017): Metallurgy and Advanced Material Technology for Sustainable Development. Author(s), 2018. http://dx.doi.org/10.1063/1.5038701.

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