By John S. McCloy, Randal W. Tustison
Zinc sulfide has proven unequaled application for infrared home windows that require a mix of long-wavelength infrared transparency, mechanical longevity, and elevated-temperature functionality. This booklet studies the actual homes of chemical vapor deposited ZnS and their dating to the CVD method that produced them. An in-depth examine the cloth microstructure is incorporated, besides a dialogue of the material's optical houses. eventually, as the CVD technique itself is significant to the advance of this fabric, a quick historical past is gifted.
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Churchman, A. , G. A. Geach, and J. Winton, “Deformation Twinning in Materials of the A4 (Diamond) Crystal Structure,” Proc. R. Soc. London, Sect. A 238(1213), 194–203 (1956). 50. Omel’chenko, S. A. and M. F. Bulanyi, “Reversible changes in the structure of zinc sulfide crystals during elastic deformation,” Phys. Solid State 39(7), 1091 (1997). 51. Aven, M. and J. A. Parodi, “Study of the Crystalline Transformations in ZnS:Cu, ZnS:Ag, and ZnS:Cu,Al,” J. Phys. and Chem. of Solids 13, 56–64 (1960).
S2 are the dominant species by several orders of magnitude and are very close in partial pressures throughout the simulated temperature range (~588–2000 K). A simulation was then performed assuming the addition of 10 3 atm (~1 torr at 298 K) of H2 gas, which significantly changed the equilibrium such that the dominant species below 1000 °C are H2 and H2S, followed by Zn, and then HS or S2, depending on the temperature. The partial pressure of zinc (pZn) was significantly greater than the partial pressure of sulfur (pS2).
107. Shchurov, A. F. , “Structure and Mechanical Properties of Polycrystalline Zinc Sulfide,” Inorg. Mater. 40(2), 96–101 (2004). 108. , P. Krishna, and R. Pandey, “Layer Stacking,” in International Tables for Crystallography C: Mathematical, Physical, 744–765 (1999). 1 Introduction In order to appreciate the complexities associated with chemical vapor deposition of ZnS and the subsequent heat treatment of the material, one must first examine the characteristics and reactions of the main components of the system (Zn, S, H2S, and Ar).