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Extraction of tellurium and high purity bismuth from …
The optimal alkali leaching condition is 10% NaOH liquid to solid ratio of 6:1 and reaction time of 0.5 h at 25 °C. Tellurium and bismuth were separated, and tellurium was enriched from a low content of anode slime raw materials. The recovery rate of tellurium and bismuth were 84.9% and 97.1%, respectively.
The Thermoelectric Properties of Bismuth Telluride
Bismuth telluride is the working material for most Peltier cooling devices and thermoelectric generators. This is because Bi 2 Te 3 (or more precisely its alloys with Sb …
A flexible feature for the long-reigning …
Now, reporting in Nature Nanotechnology, Lu et al. have found a surprisingly flexible aspect to the old champion bismuth telluride, which could accelerate flexible …
Selective reduction separation and recovery of tellurium and bismuth …
A simple and efficient method was proposed to selectively separate and recover tellurium and bismuth in an acidic leaching solution of tellurium−bismuth ore by Na 2 SO 3 and Fe powder. Then, the selective reduction mechanism was investigated by SEM−EDS, XRD, XPS, ICP-OES, etc. 99.83% Te in leaching solution can be reduced by …
Selective Separation and Recovery of Tellurium from …
However, common components of the slimes are copper, silver, gold, selenium, tellurium, arsenic, bismuth, antimony, lead, barium, and platinum-group metals (PGMs) [5,6,7,8]. Tellurium is a rare metalloid that is majorly produced from copper anode slime . Tellurium is categorized as a strategic metal owing to its scarcity in the primary ...
4.5 Bismuth Telluride and its Alloys
The maximum figure of merit can be observed parallel to the cleavage plains and outperforms the normal direction by a factor of 2. Figures 4.5 and 4.6 depict thermoelectrically relevant data of bismuth telluride alloys with respect to the material composition at room temperature. Transport properties have been measured parallel to …
Making of free cutting steels with additions of lead, bismuth
Abstract. Steels with additions of lead, bismuth and tellurium comprise the high sulphur free cutting steels but also Al-killed grades such as carbon steels, cold heading and alloyed steels ...
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Liquid-Phase Exfoliation of Bismuth Telluride Iodide (BiTeI
Bismuth telluride halides (BiTeX) are Rashba-type crystals with several potential applications ranging from spintronics and nonlinear optics to energy. Their layered structures and low cleavage energies allow their production in a two-dimensional form, opening the path to miniaturized device concepts. The possibility to exfoliate bulk BiTeX crystals in …
Tellurides associated with volcanogenic massive sulfide …
To test our hypothesis, we used a Venus simulation chamber and studied the stability of various tellurium, bismuth, and sulfur mixtures at Venus temperatures and pressures and in atmospheres of CO 2, 100 ppm SO 2 in CO 2, or 100 ppm COS in CO 2. When mixed together bismuth, tellurium, and sulfur phases preferentially formed …
The Thermoelectric Properties of Bismuth Telluride
Bismuth telluride is the working material for most Peltier cooling devices and thermoelectric generators. This is because Bi 2 Te 3 (or more precisely its alloys with Sb 2 Te 3 for p-type and Bi 2 Se 3 for n-type material) has the highest thermoelectric figure of merit, zT, of any material around room temperature. Since thermoelectric technology will be greatly …
Metals | Free Full-Text | Effect of Bismuth and Telluride on …
The development of free-cutting steel is inseparable from the development of environmentally friendly alloy elements and the control of inclusions shape. Alloying elements can affect the composition, morphology, size, and distribution of inclusion, which are the main factors affecting the machinability of free-cutting steel. This study selected …
Metalloids
Study with Quizlet and memorize flashcards containing terms like *Which elements are metalloids? Check all that apply.* boron tungsten aluminum bismuth silicon tellurium tin, *Very good electrical conductivity:* *Amphoteric, able to form acidic OR basic compounds* *Gaseous at room temperature:* *Solid at room temperature:* *Brittle:*, *Fatima is …
Leaching of Tellurium and Bismuth from the Dashuigou Tellurium …
where η is the extraction ratio of tellurium or bismuth, %.m 0 is the weight of the tellurium ore every leaching experiment, g. In this work, the value of m 0 is 1. w 0 is the mass fraction of tellurium or bismuth of the tellurium ore, %. C t is the concentration of tellurium or bismuth in leach liquor at the final moment, g/L. V m is the volume of leach …
A novel and clean process for extracting tellurium and bismuth from
A large number of flotation experiments were carried out on bismuth tellurium deposits and the tellurium grade and recovery rate of obtained concentrate products are 9.94 and 94.81%, respectively ...
Tellurium: A Rare Element with Influence on Prokaryotic and …
This system is based on solid Te sources (tellurium dioxide, autoclave slime, cadmium telluride, bismuth telluride) being able to dissolve to yield soluble TeO 3 2−. The TeO 3 2− enters the cell and the bacterium transforms it to either metallic elemental Te or a gaseous Te species (dimethyl telluride C 2 H 6 Te) [ 20, 71, 72 ].
Bismuth Telluride and Its Alloys as Materials for …
Abstract. Bismuth telluride and its alloys are widely used as materials for thermoelectric refrigeration. They are also the best materials for use in thermoelectric …
Properties of Nanostructure Bismuth Telluride …
Bismuth telluride has high thermoelectric performance at room temperature; in present work, various nanostructure thin films of bismuth telluride were fabricated on silicon substrates at room …
Advances in bismuth-telluride-based thermoelectric …
Here, we summarize the novel designs, properties, and applications of Bi Te -based thermoelectric devices in different contexts, including wearable, portable, …
Bismuth Metallurgy | SpringerLink
Bismuth metallurgy is the technology used to extract bismuth from bismuth-containing substances. Bismuth was used in ancient Greece and Rome, but it was not regarded as an element. In 1753, C. Geoffroy and T. Bergman proved that bismuth is an element. The English name of this element, originating from its Latin name, …
Dissolution Behaviors of Minerals in Tellurium–Bismuth Ore …
Figure 10 shows the effect of the leaching cycle number on the leaching efficiency and the concentrations of Te and Bi from the tellurium− bismuth ore with a liquid/solid ratio of 6:1 mL/g at 90 ...
Tellurium: Uses, Production and Future Potential
Tellurium is a key raw material for the manufacture of thin-film cadmium-telluride (CdTe) photovoltaic (PV) modules, meaning it is an essential component in efforts to meet future carbon dioxide emissions and associated climate change temperature targets. Solar PV modules have been the most rapidly deployed renewable energy technology worldwide …
Tellurium, from Copper Anode Slime to High Purity …
Tellurium is a rare metalloid that is vastly produced from copper anode slime, which is a by-product of the copper electrorefining process. Choosing the proper recovery method strongly depends on the slimes composition, mineralogy, and tellurium concentration. In addition, correctly selecting the right method of leaching, purification, …
Selective sulfidation-vacuum volatilization processes for tellurium …
The results show that bismuth was thoroughly sulfereted and tellurium was a pure metal when the mass ratio of sulfur to bismuth telluride was 0.168, the sulfidation temperature was 573 K, and the holding time was 60 min. After sulfidation of the bismuth telluride waste, the sulfides were telluride and bismuthous sulfide.
Tellurium | History, Uses, Facts, Physical & Chemical …
In molten form, tellurium is corrosive to copper, iron and stainless steel. It has high melting point about 449.51 C and boiling point is 988 C. Its chemical symbol is Te. Tellurium atomic number is 52 and atomic mass is about 127.60 g/mol. Tellurium belongs to chalcogen (oxygen family).
Enhancing thermoelectric properties of bismuth …
1. Introduction F lexible thermoelectric generators (f-TEGs) using thin film materials have the ability to generate uninterrupted green power from waste body heat, …
Refining method of high-tellurium crude bismuth
The invention relates a refining method of high-tellurium crude bismuth. In the method, high-tellurium crude bismuth serving as a raw material is heated and molten in a refining pot; molten slag floating on the liquid level is fished out when the temperature rises to 600 to 700 DEG C; an alkaline substance which accounts for 2 to 6 percent of the weight of …
Refinement of the Phase Diagram of the Bi-Te …
It forms eutectics with elemental bismuth and tellurium which crystallize at 539 K and 686 K, respectively. In Ref. 26, these data were basically confirmed and it was …
Van der Waals Integration of Bismuth Quantum Dots-Decorated Tellurium
In this work, 0D bismuth quantum dots (Bi QDs)-decorated 1D tellurium nanotubes (Te NTs) vdW heterojunctions (Te@Bi vdWHs) are constructed by a facile bottom-up assembly process. Transient absorption spectroscopy suggests that Te@Bi vdWH is a promising candidate for new-generation optoelectronic devices with fast …
Bismuth Telluride and Its Alloys as Materials for …
1. Introduction. Since the observation [], sixty years ago, of a substantial lowering of temperature by means of the Peltier effect in a thermocouple incorporating bismuth telluride, Bi 2 Te 3, this compound has been extensively used in the construction of thermoelectric modules.The performance of these modules has steadily improved, since …
Coordination chemistry of homoatomic ligands of bismuth, selenium …
In their coordination chemistry, the heavy main-group elements bismuth, selenium and tellurium make use of their paired or unpaired p-electrons to establish covalent bonds to the transition metals. As a rule bismuth acts as a one-electron donor, whereas the chalcogens are two-electron donors. The transition metal cation typically …
Refinement of the Phase Diagram of the Bi-Te System and …
Alloys of the system Bi-Te obtained by long-term thermal annealing of samples quenched from 1000 K were studied by differential thermal analysis, x-ray phase diffraction, and scanning electron microscopy methods, as well as by electromotive forces measurements (EMF) of concentration cells relative to a bismuth electrode. A new …
Dashuigou Tellurium Deposit in Sichuan Province, China: S, …
Abstract: Dashuigou, a unique tellurium-dominated deposit over the world, is located in the western margin of the Yangtze cra-ton in southwestern China. It is characterized by high-grade tellurium accompanied by bismuth, gold, silver, and sulfur, and occurs in the area of less than one km 2.The mineralization is divided into three …
The Thermoelectric Properties of n-Type Bismuth …
Research 31 Mar 2020 Vol 2020 Article ID: 4361703 DOI: 10.34133/2020/4361703 Abstract Alloying bismuth telluride with antimony telluride and bismuth selenide for p - and n -type materials, …
Tellurium (Te) | AMERICAN ELEMENTS
Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control. Tellurium is used in ceramics. Bismuth telluride has been used in thermoelectric devices. Tellurium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity ). Elemental or metallic forms include ...
Tellurium Mine (MRDS #10079845) AU
IN 1909-1910, THE ARGUS GOLD MINING CORP. CLEANED OUT PART OF THE OLD WORKINGS, SANK A SHAFT, AND STARTED DRIVES IN EITHER DIRECTION ALONG THE VEIN, BUT THE MINE WAS SHUT. DOWN BEFORE THE DRIVES HAD PROGRESSED MORE THAN A FEW FEET. FROM 1935 TO 1937 THE MINE WAS …
The Thermoelectric Properties of n-Type Bismuth …
The n-type Bi 2 Te 3-Bi 2 Se 3 alloy is less straightforward. Mass contrast alloy scattering modeling does not match thermal conductivity values reported in the literature, and there is wide variability in qualitative trends …