Evaluation of Aerogel Materials for High-Temperature Batteries

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Siiica aerogels have 1/3 the thermal conductivity of the best commercial composite insulations, or ~13 mW/m-K at 25°C. However, aerogels are transparent in the near IR region of 4-7 µm, which is where the radiation peak from a thermal-battery stack occurs. Titania and carbon- black powders were examined as thermal opacifiers, to reduce radiation at temperatures between 300°C and 600°C, which spans the range of operating temperature for most thermal batteries. The effectiveness of the various opacifiers depended on the loading, with the best overall results being obtained using aerogels filled with carbon black. Fabrication and strength issues still remain, ... continued below

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6 Pages

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Ashley, Carol S.; Guidotti, Ronald A.; Reed, Scott T. & Reinhardt, Frederick W. May 4, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 26 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
    Place of Publication: Albuquerque, New Mexico

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Description

Siiica aerogels have 1/3 the thermal conductivity of the best commercial composite insulations, or ~13 mW/m-K at 25°C. However, aerogels are transparent in the near IR region of 4-7 µm, which is where the radiation peak from a thermal-battery stack occurs. Titania and carbon- black powders were examined as thermal opacifiers, to reduce radiation at temperatures between 300°C and 600°C, which spans the range of operating temperature for most thermal batteries. The effectiveness of the various opacifiers depended on the loading, with the best overall results being obtained using aerogels filled with carbon black. Fabrication and strength issues still remain, however.

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6 Pages

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  • 34th Intersociety Energy Conversion Engineering Conference; Vancouver, BC; 08/01-05/1999

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  • Other: DE00007232
  • Report No.: SAND99-1115C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 7232
  • Archival Resource Key: ark:/67531/metadc711990

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  • May 4, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 28, 2016, 1:26 p.m.

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Ashley, Carol S.; Guidotti, Ronald A.; Reed, Scott T. & Reinhardt, Frederick W. Evaluation of Aerogel Materials for High-Temperature Batteries, article, May 4, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc711990/: accessed May 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.