Specific heat of Teflon-40 and BF-2 glue in the 10?300�K temperature range

Specific heat and thermal expansion measurements have been performed on Nd1−xLUxMn2 in the temperature range between 1.5K and 300K. Below 10K, anomalies are observed which are ascribed to a spin reorientation of the Nd sublattice. These anomalies are only slightly affected by the substitution of Nd by Lu. Large effects, however, are observed on the magnetic properties of the Mn sublattice. The antiferromagnetic order disappears for x exceeding 0.30. The data are analysed in terms of Grüneisen parameters. In the paramagnetic compound LuMn2, a spin-fluctuation contribution to the thermodynamic properties is observed. In the Nd-containing compounds, distinct contributions from the crystal field acting on the Nd ions can be distinguished. The variation of the magnetic properties of the Mn sublattice with the concentration of Lu is discussed.

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Specific heats of polymer powders by differential scanning calorimetry

Canadian Journal of Chemistry ◽

10.1139/v82-257 ◽

1982 ◽

Vol 60 (14) ◽

pp. 1853-1856 ◽

Cited By ~ 3

Author(s):

Eva I. Vargha-Butler ◽

A. Wilhelm Neumann ◽

Hassan A. Hamza

Keyword(s):

Differential Scanning Calorimetry ◽

Specific Heat ◽

Scanning Calorimetry ◽

Temperature Range ◽

Specific Heats ◽

Powdered Form ◽

Polymer Powders

The specific heats of five polymers were determined by differential scanning calorimetry (DSC) in the temperature range of 300 to 360 K. The measurements were performed with polymers in the form of films, powders, and granules to clarify whether or not DSC specific heat values are dependent on the diminution of the sample. It was found that the specific heats for the bulk and powdered form of the polymer samples are indistinguishable within the error limits, justifying the determination of specific heats of powders by means of DSC.

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An anomaly in the specific heat below 3 °K of copper containing hydrogen

Canadian Journal of Physics ◽

10.1139/p69-191 ◽

1969 ◽

Vol 47 (14) ◽

pp. 1485-1491 ◽

Cited By ~ 20

Author(s):

Neil Waterhouse

Keyword(s):

Specific Heat ◽

Molecular Hydrogen ◽

Pure Copper ◽

Solid Hydrogen ◽

Rotational State ◽

Experimental Results ◽

Ortho Hydrogen ◽

Temperature Range ◽

A Value ◽

Heat Curve

The specific heat of copper heated in hydrogen at 1040 °C has been measured over the temperature range 0.4 to 3.0 °K and found to be anomalous. The anomaly occurs in the same temperature range as the solid hydrogen λ anomaly which, in conjunction with evidence of ortho to para conversion of hydrogen in the sample, suggests the presence of molecular hydrogen in the copper. The anomaly reported by Martin for "as-received" American Smelting and Refining Company (ASARCO) 99.999+ % pure copper has been briefly compared with the present results. The form of the anomaly produced by the copper-hydrogen specimen has been compared with Schottky curves using the simplest possible model, that for two level splitting of the degenerate J = 1 rotational state of the ortho-hydrogen molecule.Maintenance of the copper-hydrogen sample at ~20 °K for approximately 1 week removed the "hump" in the specific heat curve. An equation of the form Cp = γT + (464.34/(θ0c)3)T3 was found to fit these experimental results and produced a value for γ which had increased over that for vacuumannealed pure copper by ~2%.

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Determination of the specific heat of evaporation of a liquid from dispersed solids in a wide temperature range

Journal of Engineering Physics ◽

10.1007/bf00829191 ◽

1966 ◽

Vol 11 (5) ◽

pp. 328-332

Author(s):

M. F. Kazanskii ◽

R. V. Lutsyk ◽

V. M. Kazanskii

Keyword(s):

Specific Heat ◽

Wide Temperature Range ◽

Temperature Range ◽

Heat Of Evaporation

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The Specific Heat of Saline Ice

Journal of Glaciology ◽

10.1017/s0022143000021961 ◽

1975 ◽

Vol 14 (72) ◽

pp. 459-465 ◽

Cited By ~ 2

Author(s):

Bharat Dixit ◽

E. R. Pounder

Keyword(s):

Theoretical Model ◽

Melting Point ◽

Specific Heat ◽

Experimental Results ◽

Temperature Range ◽

Calorimetric Experiment

A calorimetric experiment was performed to determine empirically the dependence of the specific heat of ice with salinity 0-10‰ over the temperature range from –23° C to the melting point The experimental results agree with the theoretical model determined by Schwerdtfeger (1963) for calculating the specific heat except within several degrees of the melting point and for very pure ice.

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Thermophysical Properties of Pongama Honge Oil Methyl Ester and Rubber Seed Oil Methyl Ester for Wide Temperature Range

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.11.4.23 ◽

2019 ◽

Vol 11 (4) ◽

Author(s):

Shaik Moulali ◽

Y.V. Hanumantha Rao ◽

Vinay Atgur ◽

G. Manvendra ◽

G.P. Desai

Keyword(s):

Thermal Conductivity ◽

Methyl Ester ◽

Thermal Degradation ◽

Specific Heat ◽

Seed Oil ◽

Edible Oils ◽

Rubber Seed Oil ◽

Rubber Seed ◽

Temperature Range ◽

Honge Oil Methyl Ester

Thermal energy is used in the process of heating, cooling and product design purpose. In this work, two non-edible oils are considered and their thermal conductivity, specific heat and thermal degradation are experimentally determined as a function of temperature using, guarded hot plate method, differential scanning calorimetry (DSC) and thermogravtic analyser (TGA). Miniature difference between the obtained and actual thermal conductivity values are influenced by the fatty acid composition. In the present work Pongamia Honge Oil Methyl Ester (HOME) and Rubber Seed Oil Methyl Ester (ROME) are studied and their properties are determined experimentally for a temperature range of 25 to 80C. It has been observed that thermal conductivity of HOME decreases from 0.168 to 0.124 W/mK and for ROME thermal conductivity decreases from 0.143 to 0.113 W/mK. Thermal degradation and specific heat were studied using TGA and DSC. Specific heat was studied in the range from 35 to 120 C. For HOME, the specific heat varies from 2.345 to 2.64 kJ/kgK. For ROME, the specific heat varies from 1.572 to 1.992 kJ/kgK.

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