Thermal diffusivity of polyurethane foams measured by the modified ångström method

1999 ◽  
Vol 39 (9) ◽  
pp. 1689-1695 ◽  
Author(s):  
Aleksander Prociak ◽  
Jan Pielichowski ◽  
Tomasz Sterzyñski
Keyword(s):  
Thermal Diffusivity ◽  
Polyurethane Foams ◽  
Modified Angstrom Method

scholarly journals Thermal diffusivity of rigid polyurethane foams blown with different hydrocarbons

2000 ◽  
Vol 19 (6) ◽  
pp. 705-712 ◽  
Author(s):  
Aleksander Prociak ◽  
Jan Pielichowski ◽  
Tomasz Sterzynski
Keyword(s):  
Thermal Diffusivity ◽  
Polyurethane Foams ◽  
Rigid Polyurethane Foams

Thermal diffusivity of polymers by modified angström method

2010 ◽  
Vol 29 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Wilson Nunes dos Santos ◽  
Jorge Nicolau dos Santos ◽  
Paul Mummery ◽  
Andrew Wallwork
Keyword(s):  
Thermal Diffusivity ◽  
Modified Angstrom Method

Photopyroelectric Measurement of the Thermal Diffusivity of Recrystallized High Purity Aluminum

1991 ◽  
Vol 3 (1) ◽  
pp. 69-80
Author(s):  
S. B. Peralta ◽  
S. C. Ellis ◽  
C. Christofides ◽  
A. Mandeiis ◽  
H. Sang ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
High Purity ◽  
High Purity Aluminum

THERMAL DIFFUSIVITY OF POLYMER FOILS - SEMICRYSTALLINE PETP AND PE - AS A FUNCTION OF DRAWING

1983 ◽  
Vol 44 (C6) ◽  
pp. C6-463-C6-467 ◽  
Author(s):  
B. Merté ◽  
P. Korpiun ◽  
E. Lüscher ◽  
R. Tilgner
Keyword(s):  
Thermal Diffusivity ◽  
Polymer Foils

About definition of the local entropy rate of production in experiment of pulse electric heating

2020 ◽  
pp. 29-34
Author(s):  
Alexandr V. Kostanovskiy ◽  
Margarita E. Kostanovskaya
Keyword(s):  
Thermal Diffusivity ◽  
Electric Heating ◽  
Thermal Capacity ◽  
Entropy Rate ◽  
Initial Time ◽  
Local Entropy ◽  
Linear Mode ◽  
Electric Capacity ◽  
Definition Of ◽  
Pulse Electric

Work is devoted to studying of a linear mode thermodynamic – a mode which is actively investigated now. One of the main concepts of a linear mode – local entropy rate of production. The purpose of given article consists in expansion of a circle of problems for which it is possible to calculate a local entropy rate of production, namely its definition, using the experimental “time-temperature” curves of heating/cooling. “Time-temperature” curves heating or cooling are widely used in non-stationary thermophysical experiments at studying properties of substances and materials: phase transitions of the first and second sort, a thermal capacity, thermal diffusivity. The quantitative substantiation of the formula for calculation of the local entropy rate of production in which it is used thermogram (change of temperature from time) which is received by a method of pulse electric heating is resulted. Initial time dependences of electric capacity and temperature are measured on the sample of niobium in a microsecond range simultaneously. Conformity of two dependences of the local entropy rate of production from time is shown: one is calculated under the known formula in which the brought electric capacity is used; another is calculated, using the thermogram.

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