Influence of minor oxidation of the precursor powders to form nanocrystalline CdTe by mechanical alloying
作者： C.E.M. Campos , K. Ersching , J.C. de Lima , T.A. Grandi , H. Höhn
DOI: 10.1016/J.JALLCOM.2007.11.016
关键词: Crystallite 、 Calorimetry 、 Materials science 、 Differential scanning calorimetry 、 Nanocrystalline material 、 Crystallography 、 Energy-dispersive X-ray spectroscopy 、 Raman spectroscopy 、 Powder mixture 、 Analytical chemistry 、 X-ray crystallography
摘要: Abstract Nanocrystalline CdTe was prepared by mechanical alloying using Te and Cd equiatomic powder mixture slightly oxidized due air exposition (6% α-TeO 2 10% CdO, respectively). X-ray diffraction, energy dispersive spectroscopy, differential scanning calorimetry Raman spectroscopy techniques were used to study the structural, chemical, thermal optical properties of milled powder. An annealing alloyed sample at 550 °C for 6 h performed clarify reactions showed in measurement. The main crystalline phase formed zinc blende CdTe, but residual amorphous minority (Te O 7 ) phases also observed annealed samples, respectively. structural parameters, fractions, mean crystallite sizes strains all obtained from Rietveld analyses patterns. results disappearing high-frequency modes after milling suggest photo-induced decomposition and/or recombination atoms interfacial component trigonal form both samples.
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