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JOURNAL OF SYNTHETIC CRYSTALS ›› 2023, Vol. 52 ›› Issue (12): 2222-2227.

• Research Articles • Previous Articles     Next Articles

High-Temperature Performances of Chemical Vapor Depositon Elemental ZnS

CUI Hongmei1,2, ZHANG Xu1,2, CHEN Lin3, SU Jian1, SONG Lei1,2, MA Tianyi1,2, QIAN Xun1,2, WEI Zhonghua1,2   

  1. 1. Sinoma Synthetic Crystals Co., Ltd., Beijing 100018, China;
    2. Beijing Sinoma Synthetic Crystals Co., Ltd., Beijing 100018, China;
    3. Unit 93160 of the PLA, Beijing 101300, China
  • Received:2023-09-27 Online:2023-12-15 Published:2023-12-26

Abstract: As a kind of medium and long wave infrared optical material, elemental ZnS has excellent optical and mechanical properties. At present, the development of hypersonic vehicle urgently requires research on the high-temperature performance of elemental ZnS infrared windows.The high-temperature performance of elemental ZnS at different temperatures were studied in this paper, and the results show that the emissivity of elemental ZnS increases with the increase of wavelength, and increases with the increase of temperature at the same wavelength. At 500 ℃, the average normal optical spectrum emissivity is less than 0.05 at 3~5.5 μm, and less than 0.10 at 7~10.5 μm. In the range of 2~9.5 μm, the temperature has little effect on the transmittance, but after 9.5 μm, the transmittance decreases significantly as the temperature increases. The refractive index, thermal optical coefficient, and expansion coefficient increase with increasing temperature. Temperature has almost no effect on bending strength. The elastic modulus decreases with increasing temperature, the elastic modulus at 800 ℃ decreases by about 30% compared to that at room temperature.

Key words: chemical vapor desposition, high-temperature performance, elemental ZnS, transmittance, elastic modulus

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