P-Type PbTe thermoelectric bulk materials with nanograins fabricated by attrition milling and spark plasma sintering

Chia Hung Kuo; Ming Shan Jeng; Jie Ren Ku; Shih Kuo Wu; Ya Wen Chou; Chii Shyang Hwang

doi:10.1007/s11664-009-0677-7

P-Type PbTe thermoelectric bulk materials with nanograins fabricated by attrition milling and spark plasma sintering

Chia Hung Kuo, Ming Shan Jeng, Jie Ren Ku, Shih Kuo Wu, Ya Wen Chou, Chii Shyang Hwang

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

This work reports a manufacturing process that combines attrition milling and spark plasma sintering (SPS) in the preparation of PbTe bulk materials with nanosize grains. The process involves milling raw PbTe ingots into nanocrystalline powders and subsequent compacting of these powders into dense bulk materials by spark plasma sintering. Sintered samples with relative densities of over 95% and grain sizes as small as 80 nm to 1 μm were obtained through this process. The thermoelectric properties of the samples were measured and compared with those of raw ingots at temperatures from 300 K to 400 K to demonstrate the influence of grain size on thermoelectric properties. The results reveal that reducing the grain size improved thermoelectric performance.

Original language	English
Pages (from-to)	1956-1961
Number of pages	6
Journal	Journal of Electronic Materials
Volume	38
Issue number	9
DOIs	https://doi.org/10.1007/s11664-009-0677-7
Publication status	Published - 2009 Sep

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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abstract = "This work reports a manufacturing process that combines attrition milling and spark plasma sintering (SPS) in the preparation of PbTe bulk materials with nanosize grains. The process involves milling raw PbTe ingots into nanocrystalline powders and subsequent compacting of these powders into dense bulk materials by spark plasma sintering. Sintered samples with relative densities of over 95% and grain sizes as small as 80 nm to 1 μm were obtained through this process. The thermoelectric properties of the samples were measured and compared with those of raw ingots at temperatures from 300 K to 400 K to demonstrate the influence of grain size on thermoelectric properties. The results reveal that reducing the grain size improved thermoelectric performance.",

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T1 - P-Type PbTe thermoelectric bulk materials with nanograins fabricated by attrition milling and spark plasma sintering

AU - Kuo, Chia Hung

AU - Jeng, Ming Shan

AU - Ku, Jie Ren

AU - Wu, Shih Kuo

AU - Chou, Ya Wen

AU - Hwang, Chii Shyang

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AB - This work reports a manufacturing process that combines attrition milling and spark plasma sintering (SPS) in the preparation of PbTe bulk materials with nanosize grains. The process involves milling raw PbTe ingots into nanocrystalline powders and subsequent compacting of these powders into dense bulk materials by spark plasma sintering. Sintered samples with relative densities of over 95% and grain sizes as small as 80 nm to 1 μm were obtained through this process. The thermoelectric properties of the samples were measured and compared with those of raw ingots at temperatures from 300 K to 400 K to demonstrate the influence of grain size on thermoelectric properties. The results reveal that reducing the grain size improved thermoelectric performance.

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