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Effects of Ball-Milling Atmosphere on the Thermoelectric ...

Apr 14, 2009· 10%· Inspired by the high ZT value lately attained in Ar-protected ball-milled nanocrystalline p-BiSbTe bulk alloy, we report herein an investigation of the effects of ball-milling atmosphere on the thermoelectric (TE) properties of the traditional TE material (GeTe) 85 (AgSbTe 2) 15 (TAGS-85). TAGS-85 samples were prepared via a melting–quenching–annealing process, and then ball …

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Cost effective synthesis of p-type Zn-doped MgAgSb by ...

Cost effective synthesis of p-type Zn-doped MgAgSb by planetary ball-milling with enhanced thermoelectric properties Yanyan Zheng,a Chengyan Liu,a Lei Miao, *a Hong Lin, b Jie Gao,a Xiaoyang Wang,a Junliang Chen,a Shaohai Wu,a Xin Lia and Huanfu Caic As promising candidates for the progress of low-temperature thermoelectric devices, MgAgSb-based

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The Effect of Porosity and Milling Induced Defects on the ...

Jul 29, 2016· The p‐type (Bi,Sb) 2 Te 3 bulks are prepared from ball‐milling powders by resistance pressure sintering method and their thermoelectric properties are investigated as a function of ball milling time. Prolonging milling time would introduce more anti‐site defects, interaction of vacancies and antisite defect, grain‐boundaries and interface defects, leading to lower carrier concentration ...

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Design of Ball-Milling Experiments on Bi 2 Te 3 ...

In this work, factorial ball-milling experiments have been applied to Bi 2 Te 3 material, for the first time, aiming to investigate the effect of the main process parameters on the structural features and thermoelectric properties of the ball-milled materials. The selected main parameters were the duration of milling, the speed, and the ball-to-material ratio.

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Rapid synthesis of high-performance thermoelectric ...

Sep 01, 2013· High-energy ball milling has been used as an efficient method to synthesize TE materials at fully scalable quantities from a few grams to kilograms in a few hours, especially for simple binary compounds such as Si 1– x Ge x alloy[] and Bi 2 Te 3.[] However, for more complex systems, high-energy ball milling synthesis often requires additional heat treat-ments[] or gives rise to …

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widely used best performance ball classifier mills with ...

Hot Sell Ball Mill and Classifier for GCC Production Line · Jining Hengwang Mining Machi. Thermoelectric Materials, Devices and Systems: Technology . 139 system is attempted, the best ZT values reported are around 0.3. More common use of these materials 140 and improvement of their thermoelectric performance could lead to thermoelectric ...

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Effects of Bi2Se3 Amount in Thermoelectric Performance of ...

Apr 08, 2016· Amount of Bi 2 Se 3 has significant role in controlling thermoelectric properties of n-type Bi 2 (TeSe) 3 material. In this study, effects of Se alloying amount in Bi 2 (TeSe) 3 thermoelectric materials fabricated by high-energy ball milling and spark plasma sintering were studied and compared with other fabrication methods. Amount of Bi 2 Se 3 (5%, 10%, 15%, and 20%) did not have any ...

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Ball milling as an effective route for the preparation of ...

Aug 24, 2015· Ball milling leads to a substantial improvement in the thermoelectric figure of merit of unsubstituted bornite (ZT = 0.55 at 543 K), when compared to bornite prepared by conventional high-temperature synthesis (ZT < 0.3 at 543 K). Manganese-substituted samples have a ZT comparable to that of unsubstituted bornite.

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Review of current high-ZT thermoelectric materials ...

Jun 22, 2020· Milling/HP/hot deformation/SPS. The Bi-Te sample synthesized by ball milling and SPS two-step method contained oxide impurities. Due to the presence of oxygen species, as the temperature increased from 300 to 420 K, the ZT value also increased from 0.543 to 1.671 [].HD could enhance the TE properties of the zone-fused (Bi, Sb) 2 Te 3 alloy. In the HD Bi 0.4 Sb 1.6 Te 3 sample, a ZT value …

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Effect of ball milling time on the thermoelectric ...

Jul 25, 2013· Lin et al. reported the ball milling effect on the thermoelectric materials of the n-type materials. The grain size is reduced with ball milling time in both results. Although both antisite and vacancy defects were produced by the ball milling, Te vacancies and the antisite defects are mainly produced in the n-type, whereas the antisite defects ...

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Optimization of ball-milling process for preparation of Si ...

Feb 01, 2015· Optimization of ball-milling process for preparation of Si–Ge nanostructured thermoelectric materials with a high figure of merit Author links open overlay panel A.A. Usenko a D.O. Moskovskikh a M.V. Gorshenkov a A.V. Korotitskiy a S.D. Kaloshkin a A.I. Voronin a V.V. Khovaylo a b

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Parametric analysis of ball milling condition on ...

Aug 29, 2018· The FeCo 3 Sb 12 skutterudite crystal was doped with Bi to act as a filler material for the Bi 0.6 FeCo 3 Sb 12 formulation. It was prepared by ball milling and spark plasma sintering. The microstructure and thermoelectric performance of the bulk skutterudite was evaluated as function of its mechanical alloying process, i.e. ball milling.

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SnSe + Ag2Se composite engineering with ball …

engineering; Ball milling 1 Introduction Thermoelectric (TE) materials, which could directly con-vert heat into electrical energy and vice versa, are deemed as promising materials for applications in thermoelectric power generators and refrigerators [1–3]. Generally, the TE conversion efficiency is depended on the figure of merit

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Effects of Ball-Milling Atmosphere on the Thermoelectric ...

Apr 14, 2009· Inspired by the high ZT value lately attained in Ar-protected ball-milled nanocrystalline p-BiSbTe bulk alloy, we report herein an investigation of the effects of ball-milling atmosphere on the thermoelectric (TE) properties of the traditional TE material (GeTe) 85 (AgSbTe 2) 15 (TAGS-85). TAGS-85 samples were prepared via a melting–quenching–annealing process, and then ball-milled in ...

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Parametric analysis of ball milling condition on ...

Aug 29, 2018· SPS has been a preferred method of consolidating bulk thermoelectric materials, given that it is a fast, high energy process which is able to produce high density single phase materials. In this paper we studied the effect of ball milling time to microstructure of the powder and bulk samples of the Bi 0.6 FeCo 3 Sb 12 skutterudites.

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Effect of gallium doping and ball milling process on the ...

Sep 01, 2012· Ball milling is effective in inducing chemical reactions, which do not normally happen at room temperature,15 and is a versatile technique for the production of a range of materials.16 In this work, we have systematically studied thermoelectric performance of Ga-doped ZnO thermoelectric oxide as a function of synthesis conditions and techniques.

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Effect of gallium doping and ball milling process on the ...

Effect of gallium doping and ball milling process on the thermoelectric performance of n-type ZnO . Abstract . We report a systematic investigation of the thermoelectric properties of n-type Ga-doped ZnO synthesized using different ball milling conditions. Samples fabricated by the high-energy ball milling …

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Effect Of Ball Milling On The Particle Size Of Zinc Oxide

Effects of ball milling on the structure of cotton; Jan 17 2019 Ball milling has been used for decades to increase the ratio of amorphous material The present work used 13 techniques to follow the changes in cotton fibers nearly pure cellulose after ball milling for 15 45 and 120 min Xray diffraction results were analyzed with the Rietveld method DNP dynamic nuclear polarization natural abundance

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Nano-materials Enabled Thermoelectricity from Window ...

Nov 13, 2012· All six different samples (ball milled nano-materials, sulfur added ball milled nano-materials and as purchased thermoelectric powders) were …

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Preparation of bismuth telluride based thermoelectric ...

Bismuth Telluride Based Thermoelectric Nano materials Via Low-Energy Ball Milling and their Property Characterizations. Major Professor: Xiulin Ruan, School of Mechanical Engineering. Thermoelectric materials are able to convert energy between heat and electricity with no moving parts, making them very appealing for power generation purposes. This

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Effect of Silicon and Sodium on Thermoelectric Properties ...

Te) thermoelectric materials fabricated by ball milling and hot pressing have decent thermoelectric properties but weak mechanical strength. Addition of silicon (Si) nanoparticles strengthened the mechanical property by reducing the grain size and defect density but resulted in low electrical conductivity that was not desired for any

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SnSe + Ag2Se composite engineering with ball milling for ...

engineering; Ball milling 1 Introduction Thermoelectric (TE) materials, which could directly con-vert heat into electrical energy and vice versa, are deemed as promising materials for applications in thermoelectric power generators and refrigerators [1–3]. Generally, the TE conversion efficiency is depended on the figure of merit

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Improvements of thermoelectric properties for p-type Cu1 ...

May 15, 2017· Polycrystalline bulk Cu1.8S materials were fabricated using mechanical alloying (MA) and spark plasma sintering (SPS). The microstructure and thermoelectric transport properties were investigated in detail with emphasis on the effect of the mechanical alloying ball-milling process. Cu1.8S single-phase powder

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Thermoelectric silicides: A review | Request PDF

Thermoelectric (TE) materials 1-3 have the potential to fulfill a grand promise for a variety of applications from recovering waste heat in industrial processes 4,5 to powering small autonomous ...

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US9099601B2 - Thermoelectric materials and methods for ...

Materials having improved thermoelectric properties are disclosed. In some embodiments, lead telluride/selenide based materials with improved figure of merit and mechanical properties are disclosed. In some embodiments, the lead telluride/selenide based materials of the present disclosure are p-type thermoelectric materials formed by adding sodium (Na), silicon (Si) or both to thallium doped ...

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Thermoelectric properties of BiSbTe/graphene ...

May 27, 2019· Thermoelectric properties of the developed bulks were investigated in the temperature range 300–500 K. The results suggest that ball milling as well as incorporation of graphene substantially changes the transport properties of nanostructured BiSbTe composites from pristine bulk.

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Effect of gallium doping and ball milling process on the ...

We report a systematic investigation of the thermoelectric properties of n-type Ga-doped ZnO synthesized using different ball milling conditions. Samples fabricated by the high-energy ball milling resulted in a highly dense layered structure with randomly distributed voids.

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Impact of Ball Milling and High-Pressure Torsion on the ...

For thermoelectrics it is important to produce thermodynamically stable bulk nanostructured materials. Ball milling/hot pressing was shown to reduce the crystallite size by a factor of 100 and to reach about 100 nm with dislocation densities of 1012 – 1013m-2. Thereby thermoelectric properties of single, double and multifilled Sb-based skutterudites were improved significantly leading to ...

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Rapid synthesis of high-performance thermoelectric ...

pure elements through high-energy ball milling without any further heat treatment, we can successfully obtain material with figure of merit near unity at 723 K. Thermoelectric (TE) materials…

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