Structure and luminescence of gadolinium-doped cubic boron nitride powder |
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| Authors: | S V Leonchik A V Karotki |
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| Institution: | (1) Scientific and Applied Materials Research Center, National Academy of Sciences of Belarus, Minsk, Belarus;(2) University of Bristol, Bristol, Great Britain, UK;(3) Joint Institute of Mechanical Engineering, National Academy of Science of Belarus, Minsk, Belarus;(4) OPTRON Public Corporation, Moscow, Russia;(5) Moscow State University, Moscow, Russia |
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| Abstract: | The structural characteristics and chemical, morphological, and optical properties of cBN and cBN:Gd micropowders are studied by x-ray diffraction, energy-dispersive electron probe microanalysis (x-ray spectral microanalysis), and photoluminescence techniques. Cubic boron nitride (cBN) micropowders were synthesized at high pressures and temperatures from hexagonal boron nitride (hBN) micropowder and Li3N catalyst. cBN:Gd micropowders were synthesized from mixtures of hBN, Li3N, and GdF3 micropowders. A lattice parameter of a~3.615 ? is calculated for both types of powder (cBN and cBN:Gd). The photoluminescence spectra of the cBN:Gd powder are found to contain emission lines attributable to intracenter optical transitions of Gd3+ ions. |
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