Development of Novel Transition Metal Oxide Thermoelectric Materials

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Authors
  1. Kleinke, H.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Waterloo Univ, Waterloo ONT (CAN) Dept of Chemistry
Abstract
The project is concerned with optimizing the thermoelectric performance of various transition metal oxides. Today's dismounted soldier may carry with him a huge amount of electronics for operational and information gathering purposes, which easily amounts to 100 pounds of gear. Thermoelectric power generators could greatly reduce the additional weight needed for the battery supply to power these electronic devices. The project goal was to investigate bulk materials of low toxicity and high stability in air, suitable for thermoelectric power generation between 400°C and 900°C. Based on the strong performance of selected doped SrTiO3 materials, SrTiO3 served as the material of choice in this project. Various doping experiments both on the Sr and on the Ti site were performed, as well as two different processing methods, namely hotpressing and spark-plasma-sintering. Best results were obtained by spark-plasma-sintering of Tadoped SrTiO3, SrTi1-xTaxO3, as well as double substituted Sr1-xLaxTi1-x TaxO3, culminating in competitive thermoelectric-figure-of-merits above 700°C. In conclusion, SrTi1-xTaxO3 adheres to all stability and toxicity requirements; further optimization of these materials is required to enable the desired thermoelectric energy conversion efficiencies above 5%.

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Report Number
DRDC-ATLANTIC-CR-2009-175 — Contractor Report
Date of publication
01 Sep 2009
Number of Pages
36
DSTKIM No
CA034122
CANDIS No
533507
Format(s):
Electronic Document(PDF)

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