Ge Diffusion in SnTe Crystal

1998 ◽  
Vol 527 ◽  
Author(s):  
O.E. Kaportseva ◽  
L.V. Yashina ◽  
V.B. Bobruiko ◽  
D.V. Safonov ◽  
V.F. Kozlovsky ◽  
...  
Keyword(s):  
Activation Energy ◽  
Lattice Constant ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Layer By Layer ◽  
X Ray ◽  
Temperature Range

ABSTRACTThis work is devoted to the study of Ge diffusion in crystalline Sn1-δTe1+8 with δ=0.0065±0.0008 in temperature range T=878-973 K by electron probe microanalysis and layer by layer X-ray analysis. For the latter lattice constant dependence on composition was determined: a(Å)=a(SnTe)-(0.368±0.008)× where 0<×<0. 1. Activation energy was found to be about 1.3 eV, much less than in the case of Ge diffusion in PbTe.

scholarly journals Early X-ray Mapping in Electron Probe Microanalysis

2006 ◽  
Vol 12 (S02) ◽  
pp. 1376-1377
Author(s):  
P Duncumb
Keyword(s):  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
X Ray

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005

Synthetic TRPO4 crystals as reference samples in the quantitative X-ray electron probe microanalysis of rare-earth elements

2011 ◽  
Vol 66 (9) ◽  
pp. 831-837 ◽  
Author(s):  
Yu. G. Lavrent’ev ◽  
I. M. Romanenko ◽  
M. P. Novikov ◽  
L. V. Usova ◽  
V. N. Korolyuk
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
X Ray ◽  
Reference Samples

Preparation of glass standards for the use in X-ray microanalysis

1972 ◽  
Vol 38 (297) ◽  
pp. 614-617 ◽  
Author(s):  
J. A. T. Smellie
Keyword(s):  
Statistical Analysis ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Glass Beads ◽  
Fusion Process ◽  
X Ray ◽  
Natural Minerals ◽  
Significant Difference

SummaryHomogeneous glasses for the use as standards in electron-probe microanalysis were prepared as an alternative to natural minerals, oxides, and pure minerals. Homogeneity was achieved by careful grinding, mixing, and fusion of powders of known composition. Fusion was carried out under vacuum using a molybdenum boat. This method avoided bubbles and contamination and made it possible to achieve temperatures high enough for final mixing to occur during the fusion process. Nine glass beads each containing six to seven oxides were subjected to careful micro-probe examination. A statistical analysis of the results showed that for each element there was no significant difference in composition between the spots measured. As the analysing spot was of diameter 0·8 µ, this showed that the glasses were homogenous on a sub-micron scale.

Rare-earth element determination in minerals by electron-probe microanalysis: application of spectrum synthesis

1998 ◽  
Vol 62 (1) ◽  
pp. 1-8 ◽  
Author(s):  
S. J. B. Reed ◽  
A. Buckley
Keyword(s):  
Rare Earth ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Distribution Patterns ◽  
Correction Factors ◽  
Relative Precision ◽  
Element Determination ◽  
X Ray ◽  
Background Measurement ◽  
Spectrum Synthesis

AbstractElectron-probe microanalysis (EPMA) is applicable to rare-earth elements (REE) in minerals with relatively high REE concentrations (e.g. hundreds of parts per million). However, given that each of the 14 REE has at least 12 X-ray lines in the L spectrum, finding peak-free regions for background measurement can be problematical. Also, measured peak intensities are liable to require correction for interferences. Hitherto, little attention has been paid to the optimisation of background offsets and the implications of the wide variation in REE distribution patterns in different minerals. The ‘Virtual WDS’ program, which enables complex multi-element spectra to be synthesised, has been used to refine the conditions used for different REE distributions. Choices include whether to use the Lβ1 rather than the Lα1 line, background offsets, and counting times for comparable relative precision. Correction factors for interferences affecting peak and background measurements have also been derived.

Extraction of Rare Earth from La–Ni Alloys by the Glass Slag Method

2003 ◽  
Vol 18 (12) ◽  
pp. 2814-2819 ◽  
Author(s):  
Tetsuji Saito ◽  
Hironori Sato ◽  
Tetsuichi Motegi
Keyword(s):  
Rare Earth ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Oxide Phase ◽  
Chemical Analyses ◽  
X Ray Diffraction ◽  
X Ray ◽  
Boron Trioxide ◽  
Ni Alloys

The use of the glass slag method in the extraction of rare earth from La–Ni alloys was studied. X-ray diffraction and electron probe microanalysis studies revealed that the La–Ni alloys produced by the glass slag method using boron trioxide consisted of Ni and Ni3B phases. No La-containing phase such as the LaNi5 phase and the La oxide phase was found in the resultant alloys. The chemical analyses confirmed that the La content in the alloys produced by the glass slag method was very limited. However, the glass slag materials contained a large amount of lanthanum. The La in the La–Ni alloys was successfully extracted by the glass slag method using boron trioxide.

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