A model explaining the anomalous heating-rate effect in thermoluminescence as an inverse thermal quenching based on simultaneous thermal release of electrons and holes

The defect centers in TlGaSSe single crystals have been investigated by performing thermoluminescence (TL) measurements with various heating rates between 0.5 K/s and 1.0 K/s in the temperature range of 10–180 K. The TL spectra, with peak maximum temperatures at 39 K and 131 K, revealed the existences of two defect levels. Curve fitting, initial rise and peak shape methods were used to determine the activation energies of two defect centers. The experimental results also showed that the trapping process was dominated by second-order kinetics for the trap related with low temperature peak while the general order (mixed order) kinetics was dominant for the trap donated to high temperature peak. Furthermore, heating rate dependences and traps distributions were studied for two defect centers separately. Thermal quenching effect dominates the behavior of these defects as the heating rate is increased. Also, quasi-continuous distributions were established with the increase of the activation energies from 16 meV to 27 meV and from 97 meV to 146 meV for the traps associated with the peaks observed at low and high temperatures, respectively.

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Heating rate effect on the evolution of texture in (Bi,Pb)2Sr2Ca2Cu3O10Ag-sheathed tapes

Superconductor Science and Technology ◽

10.1088/0953-2048/18/5/001 ◽

2005 ◽

Vol 18 (5) ◽

pp. 583-586 ◽

Cited By ~ 7

Author(s):

J-C Grivel ◽

J Raittila ◽

G J Xu ◽

X P Chen ◽

Z Han ◽

...

Keyword(s):

Heating Rate ◽

Rate Effect

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Thermal wrinkling behavior of formable decorative film laminates

Journal of Plastic Film & Sheeting ◽

10.1177/8756087916663031 ◽

2016 ◽

Vol 33 (3) ◽

pp. 290-308 ◽

Cited By ~ 1

Author(s):

G Prasath Balamurugan ◽

Rohan N Pukadyil ◽

Mahdy M Malayery ◽

Michael R Thompson ◽

John Vlachopoulos ◽

...

Keyword(s):

Heating Rate ◽

Thermal Stresses ◽

Metal Substrate ◽

Rate Effect ◽

Time Dependent ◽

Threshold Temperature ◽

Viscoelastic Response ◽

Final Temperature ◽

Rate Effects ◽

Compliant Layer

This paper focuses on wrinkle development in decorative film laminates during heating operations with the goal to understand their driving factors and develop strategies to overcome such defects. The study looked at temperature and heating rate effects on the wrinkling behavior of a commercial black-out film laminated onto a metal substrate. The 135℃ threshold temperature identified for our film under which no wrinkles formed, related to the stiffness of its different construction layers. Heating rate was also noted by this study to be an important parameter in wrinkling; values between 1℃ and 350℃/min were tested. It was possible to exceed the threshold temperature stated above without wrinkling when the heating rate was sufficiently low (closer to 1℃/min, though less than 50℃/min was often sufficient depending on the final temperature). The heating rate effect is believed to be related to the time-dependent viscoelastic response of the compliant layer in relation to building thermal stresses.

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