INCLUSIONS OF HEXAGONAL PHASE IN CUBIC ZnS CERAMICS
Abstract
The IR Fourier reflectance spectra (50-500 cm- 1 ) of ZnS ceramics synthesized by the chemical vapor deposition (including those with an additional hot isostatic pressing), hot pressing, and physical vapor deposition are presented. The phase composition of raw materials and the temperature prehistory of the samples assumed their cubic crystallographic structure (sphalerite). However, a weak band at ~295 cm- 1 , which is characteristic of the hexagonal phase in ZnS crystals (wurtzite) manifested itself both in the reflectance spectra and in the spectra of optical constants of all samples. The recrystallization sphalerite ® wurtzite below the nominal phase transition temperature (1023 ºС) may be a consequence of the tendency of the ZnS compound to the polytypical structure formation, which is facilitated in this ceramic material by the high heterogeneity of the structure of the crystallites themselves.
About the Authors
A. A. Dunaev
Vavilov State Optical Institute
Russian Federation
Russian Federation
P. M. Pakhomov
Tver’ State University
Russian Federation
Russian Federation
S. D. Khizhnyak
Tver’ State University
Russian Federation
Russian Federation
A. E. Chmel
Ioffe Institute
Russian Federation
Russian Federation
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Review
For citations:
Dunaev A.A., Pakhomov P.M., Khizhnyak S.D., Chmel A.E. INCLUSIONS OF HEXAGONAL PHASE IN CUBIC ZnS CERAMICS. Zhurnal Prikladnoii Spektroskopii. 2019;86(1):66-70. (In Russ.)
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