Spark erosion: A high production rate method for producing Bi 0.5Sb 1.5Te 3 nanoparticles with enhanced thermoelectric performance

P. K. Nguyen, K. H. Lee, J. Moon, S. I. Kim, K. A. Ahn, L. H. Chen, S. M. Lee, R. K. Chen, S. Jin, A. E. Berkowitz

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Abstract

We report a new spark erosion technique for producing high-quality thermoelectric nanoparticles at a remarkably high rate and with enhanced thermoelectric properties. The technique was utilized to synthesize p-type Bi 0.5Sb 1.5Te 3 nanoparticles with a production rate as high as 135gh 1, using a relatively small laboratory apparatus and low energy consumption. The compacted nanocomposite samples made from these nanoparticles exhibit a well-defined, 20-50nm size nanograin microstructure, and show an enhanced figure of merit, ZT, of 1.36 at 360K. Such a technique is essential for providing inexpensive, oxidation-free nanoparticles which are required for the fabrication of high performance thermoelectric devices for power generation from waste heat, and for refrigeration.

Original languageEnglish
Article number415604
JournalNanotechnology
Volume23
Issue number41
DOIs
Publication statusPublished - 2012 Oct 19

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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    Nguyen, P. K., Lee, K. H., Moon, J., Kim, S. I., Ahn, K. A., Chen, L. H., Lee, S. M., Chen, R. K., Jin, S., & Berkowitz, A. E. (2012). Spark erosion: A high production rate method for producing Bi 0.5Sb 1.5Te 3 nanoparticles with enhanced thermoelectric performance. Nanotechnology, 23(41), [415604]. https://doi.org/10.1088/0957-4484/23/41/415604