Particle Size Effect on Load Transfer in Single Particle Composite Samples via X-Ray Diffraction

2015 ◽  
Author(s):  
Erik Durnberg ◽  
Kevin Knipe ◽  
Gregory Freihofer ◽  
Imad Hanhan ◽  
Renfei Feng ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Single Particle ◽  
Load Transfer ◽  
Particle Size Effect ◽  
X Ray Diffraction ◽  
Particle Composite ◽  
X Ray ◽  
Composite Samples

Correction Method for Particle-Size Effect in XRF Analysis of Ore Slurries

1987 ◽  
Vol 31 ◽  
pp. 503-506
Author(s):  
Marek Lankosz
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Fluorescence Analysis ◽  
Particle Size Effect ◽  
Correction Method ◽  
Measured Concentration ◽  
X Ray ◽  
Weight Percentage ◽  
Xrf Analysis

In on–stream X–ray fluorescence analysis of ore slurries, the effects due to variation in the particle-size of solids can cause appreciable and sometimes major errors in the measured concentration of an element to be determined. Weight percentage of slurry ore grains with diameter smaller than 75 um (called later W75) is commonly used as measure of ore fineness and can be determined using particle-size analyzers. A method of correcting for W75 variaition is highly desireable, particularly in a case when high analysis accuracy is required for economical reasons.

Investigation of the Particle Size Effect on the Peritectic Melting of FeSn2 Particles in FeSn2-FeSn Nanocomposites

2006 ◽  
Vol 118 ◽  
pp. 651-654
Author(s):  
Young Soon Kwon ◽  
Pyuck Pa Choi ◽  
Ji Soon Kim ◽  
Dae Hwan Kwon ◽  
K.B. Gerasimov
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Melting Temperature ◽  
Local Heating ◽  
Particle Size Effect ◽  
X Ray Diffraction ◽  
Incongruent Melting ◽  
Large Particle Size ◽  
Scanning Calorimetry ◽  
Peritectic Melting

The particle size effect on the peritectic melting of FeSn2 particles in FeSn-FeSn2 nanocomposites was studied using differential scanning calorimetry and X-ray diffraction. FeSn-10 wt.% FeSn2 compounds, mechanically milled for 30 min and slowly heated in a differential scanning calorimeter, showed incongruent melting at 680 K. Although FeSn2 grains grew from 10 to 40 nm upon heating before peritectic melting set in, the melting temperature was more than 100 K lower than the equilibrium value. A small latent heat during peritectic melting and a large amount of interfacial energy of FeSn-FeSn2 nanocomposites are held responsible for this large particle size effect. Grain growth is hardly possible in the case of rapid local heating during mechanical milling. Therefore, a decrease in the peritectic melting temperature is even expected to be substantially larger.

A dickite with an elongated crystal habit and its dehydroxylation

1959 ◽  
Vol 32 (247) ◽  
pp. 314-323 ◽  
Author(s):  
E. R. Schmidt ◽  
R. O. Heckroodt
Keyword(s):  
Particle Size ◽  
Chemical Analysis ◽  
Size Effect ◽  
Particle Size Effect ◽  
Crystal Habit ◽  
Electron Microscopic ◽  
X Ray ◽  
Thermal Data ◽  
Endothermal Effect ◽  
Optical Electron

SummaryDickite from a new occurrence at Barkly East, Cape Province, is described and compared with a previously unreported dickite from Postmasburg and a dickite from Ouray, Colorado. The Barkly East dickite crystals are elongated in the direction of the a-axis; the ratio of length to width of crystals varies from 3:1 to 16:1. Optical, electron microscopic, X-ray, and thermal data and a chemical analysis are given. The thermogram of the fraction smaller than 2 µ e.s.d.1 is characterized by a single peak at 600°C., while that of fractions larger than 2 µ e.s.d. shows a double endothermal effect. This two-stage dehydroxylation of dickite on heating is attributed to a particle size effect.

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