Thermal Conductivity Measurement Setup for Low Temperature Characterization of Laser Materials

Abstract

We have developed a setup for accurately measuring the thermal conductivity of solid dielectric samples in the temperature range of 20 350 K. This setup makes use of a cryogenic refrigerator and several custom fixtures that together allow for fine temperature control and low thermal losses across the sample. Initial benchmark measurements of an undoped single-crystal yttrium aluminum garnet (YAG) sample show good agreement with literature from cryogenic to room temperature. We present thermal conductivity results for a series of ceramic yttria samples with varying erbium (Er) concentration. These results show the expected trend of decreased thermal conductivity with increased dopant content

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2014
Accession Number
ADA612921

Entities

People

  • Tigran Sanamyan
  • Zachary D. Fleischman

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Conductivity
  • Crystal Lattices
  • Crystals
  • Dielectrics
  • Heat Flux
  • Heat Transfer
  • Laser Materials
  • Low Temperature
  • Materials
  • Mean Free Path
  • Measurement
  • Physical Properties
  • Single Crystals
  • Temperature Control
  • Temperature Gradients
  • Thermal Conductivity
  • Thermal Properties

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition