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Vol. 10 No. 1.0 (2021)
Scholar : National School of Leadership

Research Articles

Infrared-Transparent Nanostructured La0.3Y1.7O3 Synthesized by a Modified Combustion Technique

Published 2021-06-30

  • SAHITHYA S. UNNITHAN
    • ,
  • Mathew CT

SAHITHYA S. UNNITHAN
MAR IVANIOS COLLEGE

Mathew CT
MAR IVANIOS COLLEGE

Abstract

Infrared transparent windows found to have applications in demanding defense and space missions. In this paper we report the synthesis of La0.3Y1.7O3 by a modified auto-igniting combustion technique and the sintering of the pellets made from the ultrafine nanostructured powder using resistive heating. The XRD analysis and  High Resolution Transmission Electron Microscopic(HR-TEM) studies reveal that the average crystallite size is ~16nm and the lattice planes are well defined. The pure white La0.3Y1.7O3  powder is uniaxially compacted in to pellets in a 14mm diameter steel die and sintered to 98% theoretical density without any sintering additives or applying pressure at 1560oC for 2hours  in a conventional furnace which. The transmission spectrum of the sintered pellet in the Uv-Vis region reveals that the material is showing 77% of transmittance in the visible region and 76% in the Mid IR region. The results clearly indicate that the ultra-fine La0.3Y1.7O3 nanopowder synthesized by the modified auto-igniting combustion technique synthesised using single step combustion method followed by resistive heating can be used very effectively for the fabrication of improved infrared transparent windows and domes.

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