کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7997121 1516211 2016 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural characterization of Cu2SnS3 and Cu2(Sn,Ge)S3 compounds
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Structural characterization of Cu2SnS3 and Cu2(Sn,Ge)S3 compounds
چکیده انگلیسی
Cu2SnS3 (CTS) and Cu2Sn0.83Ge0.17S3 (CTGS) compounds were successfully prepared by a powder technology using a combination of mechanical alloying (MA) and spark plasma sintering (SPS). Structural, compositional and optical properties were studied. A true alloy with composition similar to the starting constituents was formed after 2 h of MA at 400 rpm. Subsequently, SPS was performed at 600 °C for 5 min under a pressure of 50 MPa. The Cu/(Sn + Ge) composition ratios of the MA and SPS materials, determined by wavelength dispersive X-ray spectroscopy, are in the range of 1.84-1.94. Rietveld refinements of the powder X-ray diffraction data show a good agreement with the monoclinic crystal structure already for the MA materials. No structural changes were observed after SPS. Raman measurements coincide with XRD results in the identification of the characteristic peaks from phonon vibrational modes of monoclinic CTS phase. Band gaps between 1.24 eV and 1.34 eV were determined by diffuse reflectance for the mechanically alloyed and sintered samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 682, 15 October 2016, Pages 489-494
نویسندگان
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