Preparation and Characteristics of IR Window Grade Zinc Sulphide Powder

  • Surendra Pratap Defence Science Centre, Delhi
  • Jagdish Prasad Defence Science Centre, Delhi
  • Rajeev Kumar Defence Science Centre, Delhi
  • Krishna Murari Defence Science Centre, Delhi
  • S. S. Singh Defence Science Centre, Delhi
Keywords: Hot isostatic pressing, IR transmitting domes

Abstract

Zinc sulphide (ZnS) is an important II-VI compound well-Known for the electrooptic applications. It is also one of the most suitable materials for the fabrication of IR transmitting domes and windows because of its transmission in the IR region of (2-12 micron) the spectrum as well as its excellent thermo - mechanical properties. The ZnS domes and windows are prepared by hot pressing or hot isostatic pressing (HIP) of optical quality grade ZnS powder. This paper describes the preparation of optical quality grade ZnS powder using a modified acid process maintaining a constant pH. The resulting ZnS powder is subjected to thermal treatment in different atmospheres and at different temperatures. The ZnS powder thus obtained has been characterised by chemical analysis partical size measurement IR spectrophotometry XR-D and XR-F analysis. The role of various experimental parameters involved, e.g., concentration of ZnSO/sub 4/ solution firing temperature and firing atmospheres is investigated. A transmission of 69 per cent was achieved after HIP of the ZnS powder prepared by this method.

Author Biographies

Surendra Pratap, Defence Science Centre, Delhi
Dr Surendra Pratap obtained his MSc and PhD ir Chemistry,' both from Aligarh Muslim University in 19,62 and 1974, respectively. He joined Solidstate Physics Laboratory, Delhi, in 1964 and is presently working as Scientist at the Defence Science Centre, Delhi. Helhas been involved in the research and development of various electronic, magnetic, and optical materials.
Jagdish Prasad, Defence Science Centre, Delhi
Mr Jagdish Prasad obtained his MSc in Chemistry from Agra Universit. in 1966. He joined DRDO at the pefence Metallurgical Research Laboratory now Defence Materibls & Stores Research & Development Establishment, Kanpur, in 1961. Presently, he is Working as Scientist at the Defence Science Centre. His fields of interest are high temperture polymors. organic nonlinear optical and infrared transmitting materials. He has published four papers in national and international journals.
Rajeev Kumar, Defence Science Centre, Delhi
Mr Rajeev Kumar obtained his MSc in MatheTatics from Meerut University in 1988. He joined Defence Science Centre, Delhi, in 1990. He is engaged in the development of infrared transmitting materials and computer applications relevant to the field.

Krishna Murari, Defence Science Centre, Delhi
Mr Krishna Murari joined Defence Science Centre, Delhi in 1991. He is engaged in the development of infrared transmitting materials.
S. S. Singh, Defence Science Centre, Delhi
Dr SS Slngh obtained his MSc (1963) and PhD (1970) in Chemistry,: both from Agra University. He joined DRDO in 1965. He held Senior Research Fellowship of Alcxander von Hurilboldt Stiftung at University of Mainz, West Germany, during November 1975 to FeQruary 1977. He also worked as Guest Research Worker (1985) at Queen Mary College. University of London. He has published over 30 research papers in national and international journals. His research interest centres around electrochemistry, spectroscopy and materials science.
Published
2013-01-01
How to Cite
PratapS., PrasadJ., KumarR., MurariK., & SinghS. (2013). Preparation and Characteristics of IR Window Grade Zinc Sulphide Powder. Defence Science Journal, 46(4), 215-221. https://doi.org/10.14429/dsj.46.4079
Section
Armaments & Explosives

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