scholarly journals Thermal Diffusivity Measurements of Carbon Materials by a Laser Flash Technique

TANSO ◽  
1998 ◽  
Vol 1998 (184) ◽  
pp. 225-228
Keyword(s):  
Thermal Diffusivity ◽  
Carbon Materials ◽  
Laser Flash ◽  
Diffusivity Measurements ◽  
Laser Flash Technique ◽  
Flash Technique

Dynamic Thermal Diffusivity Measurements – A Tool for Studying Gas-Solid Reactions

2011 ◽  
Vol 312-315 ◽  
pp. 217-222
Author(s):  
Hesham M. Ahmed ◽  
Nurini N. Viswanathan ◽  
Seshadri Seetharaman
Keyword(s):  
Thermal Diffusivity ◽  
Laser Flash ◽  
Diffusivity Measurements ◽  
Calculated Activation Energy ◽  
Laser Flash Technique ◽  
Flash Technique ◽  
The Difference ◽  
Increasing Temperature ◽  
Cold Pressed ◽  
Calculated Activation

In the present work, the thermal diffusivity measurements of uniaxially cold pressed NiWO4 has been carried out. The measurements were performed isothermally at temperatures between 973 and 1273 K under H2 gas using the laser flash technique. The experimental thermal diffusivity values were found to increase with the reduction progress as well as with increasing temperature. The calculated activation energy was found to be higher than that for chemically controlled reaction. The difference has been attributed to factors like agglomeration of the product as well as sintering of the precursor along with the chemical reaction. In order to sort out the sintering effect on the thermal diffusivity values, complementary experiments have been done on pressed NiWO4 and Ni-W, produced by the reduction of NiWO4 at 1123K, under Argon gas. The porosity change and its effect on thermal diffusivity values have been studied.

scholarly journals Thermal diffusivity of polymers by the laser flash technique

2005 ◽  
Vol 24 (5) ◽  
pp. 628-634 ◽  
Author(s):  
Wilson Nunes dos Santos ◽  
Paul Mummery ◽  
Andrew Wallwork
Keyword(s):  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Technique ◽  
Flash Technique

scholarly journals Thermophysical properties of NP2 brand nickel

2021 ◽  
Vol 2119 (1) ◽  
pp. 012135
Author(s):  
D A Samoshkin ◽  
A Sh Agazhanov ◽  
S V Stankus
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Thermal Diffusivity ◽  
Thermophysical Properties ◽  
Magnetic Phase ◽  
Laser Flash ◽  
Scanning Calorimetry ◽  
Reference Table ◽  
Laser Flash Technique ◽  
Flash Technique

Abstract The heat capacity and the thermal diffusivity of NP2 brand nickel were investigated in the temperature interval 296–1000…1375 K of the solid-state, including the region of the magnetic phase transformation. Measurements were carried out on samples from one initial ingot by laser flash technique and method of differential scanning calorimetry using LFA-427 and DSC 404 F1 setups, respectively. The thermal conductivity was calculated based on the measured thermophysical properties. The estimated errors of the obtained results were 2–4%, 3–5%, and 2–3% for thermal diffusivity, thermal conductivity, and heat capacity, respectively. For investigated thermophysical properties the fitting equations and the reference table have been received.

Thermal Diffusivity by the Laser Flash Technique

2002 ◽  
Author(s):  
Raymond E. Taylor ◽  
Jozef Gembarovic ◽  
Kosta D. Maglic
Keyword(s):  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Technique ◽  
Flash Technique

Thermal Diffusivity Measurement of Pure Te, (Hg1−x Cdx)1−yTey and (Hg1−xZnx)1−yTey

1994 ◽  
Vol 299 ◽  
Author(s):  
Hossein Maleki ◽  
Lawrence R. Holland
Keyword(s):  
Thermal Diffusivity ◽  
Melting Point ◽  
Wide Temperature Range ◽  
Laser Flash ◽  
Thermal Diffusivity Measurement ◽  
Temperature Range ◽  
Diffusivity Measurement ◽  
Laser Flash Technique ◽  
Flash Technique ◽  
Thermal Diffusivities

AbstractThe thermal diffusivities of (Hg1−xCdx)1−yTey and (Hg1−xZnx)1−yTeywith 0.55 ≤ y ≤ 1.0 and 0.0125 ≤ x ≤ 0.05465 and of pure Te are measured over a wide temperature range by the laser flash technique. The diffusivity of near pseudobinary Hg1−xCdxTe solids decrease more rapidly with temperature approaching the melting point than pseudobinary solids previously reported. The solid diffusivity for x=0.02817 is 0.83 mm2/s at 371°C, decreasing to 0.22 mm2/s at 614°C. The diffusivity of Te rich (Hg1−xCdx)1−yTey melt increases with x and with temperature. The melt diffusivity for x=0.03934 is 0.91 mm2/s at 485°C, increasing to 4.93 mm2/s at 851°C. For Te rich (Hg1−xZnx)1−yTey melt with x=0.0125 and y=0.7944 there appears to be a minimum diffusivity of about 2.6 mm2/s near 700°C. The thermal diffusivity of pure Te solid is 0.97 mm2/s at 300°C and decreases to 0.64 mm2/s at 439°C. The melt diffusivity is 1.52 mm2/s at 486°C, increasing to 3.48 mm2/s at 584°C.

Determination of thermal diffusivity in diathermic materials by the laser-flash technique

1997 ◽  
Vol 29 (6) ◽  
pp. 703-710 ◽  
Author(s):  
Rainer Hofmann ◽  
Oliver Hahn ◽  
Friedrich Raether ◽  
Harald Mehling ◽  
Jochen Fricke
Keyword(s):  
Thermal Diffusivity ◽  
Laser Flash ◽  
Laser Flash Technique ◽  
Flash Technique
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