Transparent Spinel Ceramic

Abstract

Spinel (MgAl2O4) is a cubic crystalline material with a unique combination of ruggedness and excellent transmission from the ultraviolet (0.2 micron) to the mid-infrared (5 micron) region. This positions spinel as the de facto material of choice for numerous Department of Defense and commercial infrared window applications. However, single crystal spinel is difficult to make in dimensions greater than a few millimeters using traditional high temperature (>2000 deg C) melt growth techniques. On the other hand, attempts to make polycrystalline spinel by traditional hot pressing of powder has led to inhomogeneous material, typified by opaque nontransmitting regions, thereby making it unsuitable for practical applications. However, NRL has solved this problem.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2009
Accession Number
ADA525039

Entities

People

  • G. Villalobos
  • I. D. Aggarwal
  • J. S. Sanghera
  • S. Bayya
  • W. Kim

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Defense
  • Defense Systems
  • Department Of Defense
  • Diffusion Bonding
  • Directed Energy Weapons
  • Explosive Devices
  • Fabrication
  • High Energy
  • High Energy Lasers
  • High Temperature
  • Hot Pressing
  • Improvised Explosive Devices
  • Infrared Windows
  • Laser Beams
  • Materials
  • Mechanical Properties
  • Uss Zumwalt

Fields of Study

  • Materials science

Readers

  • Astronomy/Astrophysics
  • Materials Science and Engineering.
  • Systems Analysis and Design