Low Temperature Joining and High Temperature Application of Segmented Half Heusler/Skutterudite Thermoelectric Joints

Wang, Weian; Li, Xiaoya; Gu, Meng; Xing, Yanxia; Bao, Yefeng

doi:10.3390/ma13010155

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…From Equation (1), ZT has a strong relationship with temperature T, thus, according to the optimum operating temperature, the thermoelectric materials are divided into three groups, which are: low temperature (

) TE materials: Bi 2 Te 3 series; mid temperature (

) TE materials represented by PbTe series; high temperature (>900

) TE materials which are represented by SiGe series. These series of materials have already achieved high figure of merit (ZT) values, and are applied in some certain field [ 12 , 13 , 14 , 15 , 16 ]. For instance, SiGe and PbTe series of TE materials, using radioisotope as heat source, have been used in space domains.…”

Section: Introductionmentioning

confidence: 99%

Doping Effect on Cu2Se Thermoelectric Performance: A Review

et al. 2020

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Cu2Se, owing to its intrinsic excellent thermoelectric (TE) performance emerging from the peculiar nature of “liquid-like” Cu+ ions, has been regarded as one of the most promising thermoelectric materials recently. However, the commercial use is still something far from reach unless effective approaches can be applied to further increase the figure of merit (ZT) of Cu2Se, and doping has shown wide development prospect. Until now, the highest ZT value of 2.62 has been achieved in Al doped samples, which is twice as much as the original pure Cu2Se. Herein, various doping elements from all main groups and some transitional groups that have been used as dopants in enhancing the TE performance of Cu2Se are summarized, and the mechanisms of TE performance enhancement are analyzed. In addition, points of great concern for further enhancing the TE performance of doped Cu2Se are proposed.

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) TE materials: Bi 2 Te 3 series; mid temperature (

) TE materials represented by PbTe series; high temperature (>900

Section: Introductionmentioning

confidence: 99%

Doping Effect on Cu2Se Thermoelectric Performance: A Review

et al. 2020

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“…It dissolves hemicellulose and other fiber components causing swelling and constriction of pores in jute fabrics 44 , 59 – 61 . Researchers have demonstrated that mechanical properties such as tensile strength, flexural strength, tensile modulus, and flexural modulus are superior for 6% NaOH-treated jute fabric reinforced composites relative to the jute fabrics treated at higher alkali concentrations (> 6%) 62 . Therefore, we chose alkali concentration of 5% and treatment duration of 2 h to enhance surface roughness without significantly depleting mechanical strength 44 , 59 , 63 .…”

Section: Discussionmentioning

confidence: 99%

Nature-inspired wax-coated jute bags for reducing post-harvest storage losses

Odokonyero

Gallo

Mishra

2021

Sci Rep

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Post-harvest storage of grains is crucial for food and feed reserves and facilitating seeds for planting. Ironically, post-harvest losses continue to be a major food security threat in the developing world, especially where jute bags are utilized. While jute fabrics flaunt mechanical strength and eco-friendliness, their water-loving nature has proven to be their Achilles heel. Increased relative humidity and/or precipitation wets jute, thereby elevating the moisture content of stored seeds and causing fungal growth. This reduces seed longevity, viability, and nutritional value. To address this crucial weakness of jute bags, we followed a nature-inspired approach to modify their surface microtexture and chemical make-up via alkali and wax treatments, respectively. The resulting wax-coated jute bags (WCJBs) exhibited significant water-repellency to simulated rainfall and airborne moisture compared to control jute bags (CJBs). A 2 months-long seed storage experiment with wheat (Triticum aestivum) grains exposed to 55%, 75%, and 98% relative humidity environments revealed that the grains stored in the WCJBs exhibited 7.5–4% lesser (absolute) moisture content than those in the CJBs. Furthermore, WCJBs-stored grains exhibited a 35–12% enhancement in their germination efficacy over the controls. This nature-inspired engineering solution could contribute towards reducing post-harvest losses in the developing world, where jute bags are extensively utilized for grain storage.

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“…In the intermediate and high temperature ranges the best thermoelectrics are lead chalcogenides [4,5], skutterudites [6,7], silisides [8,9], and Half Heusler (HH) alloys [10][11][12]. Recently, the attempts to prepare segmented thermoelectric modulus based on HH and skutterudites have been made [13].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Fe-Ti-Sb Thernary Phase Diagram at Temperatures above 900 K

Tukmakova¹,

Taskaev

Miki³

et al. 2021

KEM

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Heusler alloys have been considered as one of the most promising thermoelectric materials for electrical power generation in a temperature range of 500–800 °C. Establishment of phase diagrams allows one to predict formation, equilibria, and stability of phases in of these ternary alloys. In this work we report on the simulation and investigation of phase diagram and phase equilibria in ternary Ti-Fe-Sb system which is of considerable interest for thermoelectric applications. The simulation was carried out using the CALPHAD method in Pandat software. The existence of the thermoelectric Heusler TiFe1.5Sb phase was revealed in a temperature range from 970 to 1070 K. The equilibria between TiFe1.5Sb and other phases were determined. The entropy of formation was calculated for the phases existing at 970, 1020 and 1070 K using a fitting approach. A narrow equilibrium region containing pure body centered cubic Fe and TiFe1.5Sb was found.

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Low Temperature Joining and High Temperature Application of Segmented Half Heusler/Skutterudite Thermoelectric Joints

Cited by 8 publications

References 31 publications

Doping Effect on Cu2Se Thermoelectric Performance: A Review

Doping Effect on Cu2Se Thermoelectric Performance: A Review

Nature-inspired wax-coated jute bags for reducing post-harvest storage losses

Simulation of Fe-Ti-Sb Thernary Phase Diagram at Temperatures above 900 K

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