Determination of Thermal Diffusivity of Polypyrrole and Polypyrrole/Bismuth Oxide Conducting Polymers using Laser 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.

Download Full-text

Thermal Diffusivity by the Laser Flash Technique

Characterization of Materials ◽

10.1002/0471266965.com102 ◽

2002 ◽

Author(s):

Raymond E. Taylor ◽

Jozef Gembarovic ◽

Kosta D. Maglic

Keyword(s):

Thermal Diffusivity ◽

Laser Flash ◽

Laser Flash Technique ◽

Flash Technique

Download Full-text

211. Thermal diffusivity of fiber reinforced composites using the laser flash technique

Carbon ◽

10.1016/0008-6223(84)90428-7 ◽

1984 ◽

Vol 22 (2) ◽

pp. 228

Author(s):

R.E. Taylor ◽

H. Groot

Keyword(s):

Thermal Diffusivity ◽

Laser Flash ◽

Fiber Reinforced Composites ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Laser Flash Technique ◽

Flash Technique

Download Full-text

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

MRS Proceedings ◽

10.1557/proc-299-127 ◽

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.

Download Full-text