Thermal and microstructure simulation of thermoelectric material Bi2Te3 grown by zone-melting technique

Chen, Yi-Ru; Hwang, Weng-Sing; Hsieh, Huey-Lin; Huang, Jingyi; Huang, Tsai-Kun; Hwang, Jenn-Dong

doi:10.1016/j.jcrysgro.2014.05.023

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…Two types of Bi 2 Te 3 TE materials were prepared using a typical zone-melting method, 19 and one was the p-type Bi 2 Te 3 doped with Sb and the other was the n-type Bi 2 Te 3 doped with Se. The as-prepared Bi 2 Te 3 ingot was sliced into several discs, encapsulated with tape, and cut into cuboids (0.2 9 0.2 9 0.5 cm 3 ), as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Electrodeposition of Ni on Bi2Te3 and Interfacial Reaction Between Sn and Ni-Coated Bi2Te3

Tseng

Lee

Hau

et al. 2017

Journal of Elec Materi

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Bismuth-telluride (Bi 2 Te 3 )-based compounds are common thermoelectric materials used for low-temperature applications, and nickel (Ni) is usually deposited on the Bi 2 Te 3 substrates as a diffusion barrier. Deposition of Ni on the p-type (Sb-doped) and n-type (Se-doped) Bi 2 Te 3 substrates using electroplating and interfacial reactions between Sn and Ni-coated Bi 2 Te 3 substrates are investigated. Electrodeposition of Ni on different Bi 2 Te 3 substrates is characterized based on cyclic voltammetry and Tafel measurements. Microstructural characterizations of the Ni deposition and the Sn/Ni/Bi 2 Te 3 interfacial reactions are performed using scanning electron microscopy. A faster growth rate is observed for the Ni deposition on the n-type Bi 2 Te 3 substrate which is attributed to a lower activation energy of reduction due to a higher density of free electrons in the n-type Bi 2 Te 3 material. The common Ni 3 Sn 4 phase is formed at the Sn/Ni interfaces on both the p-type and n-type Bi 2 Te 3 substrates, while the NiTe phase is formed at a faster rate at the interface between Ni and n-type Bi 2 Te 3 substrates.

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Section: Methodsmentioning

confidence: 99%

Electrodeposition of Ni on Bi2Te3 and Interfacial Reaction Between Sn and Ni-Coated Bi2Te3

Tseng

Lee

Hau

et al. 2017

Journal of Elec Materi

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“…Despite the long research history, the research of Bi 2 Te 3 -based compounds is still vibrant. Zone melting is a common method for synthesizing Bi 2 Te 3 -based compounds, , which is also used in commercial device fabrication. However, zone-melting-made materials are fragile, which makes device fabrication difficult.…”

Section: Introductionmentioning

confidence: 99%

Practical High-Performance (Bi,Sb)₂Te₃-Based Thermoelectric Nanocomposites Fabricated by Nanoparticle Mixing and Scrap Recycling

Cai

Zhuang

Cao³

et al. 2020

ACS Appl. Mater. Interfaces

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Bi2Te3-based compounds are the most mature and widely used thermoelectric materials. However, industrial device fabrication will inevitably produce a lot of Bi2Te3 scraps, which results in wastes of expensive material resources. In this work, we recycled p-type (Bi,Sb)2Te3 scraps and reprocessed them by making nanocomposites with nano-SiC. The thermoelectric performance was enhanced, and a high ZT value of 1.07 was achieved, which is a significant improvement compared with commercial p-type (Bi,Sb)2Te3 ingots. Also, the hardness showed a notable increase, which is beneficial for device fabrication. In addition, we adjusted the proportion of Bi/Te of the commercial p-type (Bi,Sb)2Te3 scraps, thereby improving the thermoelectric performance and obtaining a higher ZT value of 1.2.

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“…Chen etc. [9] developed a zone melting model to simulate the growth of Bi 2 Te 3 columnar crystals. The results indicate that a high heating temperature and a low movement speed for the heater and the cooling devices should be used to obtain stable molten zone.…”

Section: Introductionmentioning

confidence: 99%

The effect of the forced heat transfer on the eutectic ceramics preparation with zone melting process

Zhang¹,

Li²,

Liu³

2018

Proceedings of the 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017)

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Abstract:The alumina-based eutectic ceramic is considered as a most promising candidate materials of aviation engines due to its excellent mechanical property and high temperature oxidation resistance. Effect of the forced heat transfer on the zone melting process of the eutectic ceramic is analyzed by finite element method. The results showed that: when the convective heat transfer coefficient increases, a higher heating power is required, especially at the initial growth stage; the melt convection intensity increases, and the convection pattern also changes. The depression degree of the solid-liquid growth interface increases significantly at the initial growth stage and this increase reduces as the interface moves away the crucible bottom.

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Thermal and microstructure simulation of thermoelectric material Bi2Te3 grown by zone-melting technique

Cited by 12 publications

References 2 publications

Electrodeposition of Ni on Bi2Te3 and Interfacial Reaction Between Sn and Ni-Coated Bi2Te3

Electrodeposition of Ni on Bi2Te3 and Interfacial Reaction Between Sn and Ni-Coated Bi2Te3

Practical High-Performance (Bi,Sb)₂Te₃-Based Thermoelectric Nanocomposites Fabricated by Nanoparticle Mixing and Scrap Recycling

The effect of the forced heat transfer on the eutectic ceramics preparation with zone melting process

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Thermal and microstructure simulation of thermoelectric material Bi2Te3 grown by zone-melting technique

Cited by 12 publications

References 2 publications

Electrodeposition of Ni on Bi2Te3 and Interfacial Reaction Between Sn and Ni-Coated Bi2Te3

Electrodeposition of Ni on Bi2Te3 and Interfacial Reaction Between Sn and Ni-Coated Bi2Te3

Practical High-Performance (Bi,Sb)2Te3-Based Thermoelectric Nanocomposites Fabricated by Nanoparticle Mixing and Scrap Recycling

The effect of the forced heat transfer on the eutectic ceramics preparation with zone melting process

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Product

Resources

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Practical High-Performance (Bi,Sb)₂Te₃-Based Thermoelectric Nanocomposites Fabricated by Nanoparticle Mixing and Scrap Recycling