High-temperature heat capacity of SPS-processed Y3Al5O12 (YAG) and Nd:YAG

S. Sagi; S. Hayun

doi:https://doi.org/10.1016/j.jct.2015.09.035

High-temperature heat capacity of SPS-processed Y₃Al₅O₁₂ (YAG) and Nd:YAG

S. Sagi, S. Hayun

Department of Materials Engineering

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

The molar heat capacity of spark plasma sintering-processed YAG and Nd:YAG (1 at.% Nd) and of single crystal Nd:YAG (1.1 at.% Nd) was evaluated by differential scanning calorimetry from between 298 K and 1623 K. The heat capacity data were fitted to an a+bT+^CT-1 relation. As-sintered SPS samples exhibited lower heat capacity values than did the single crystal. To examine the influence of possible defects created within the SPS apparatus on heat capacity, post-sintering heat treatment at 1673 K in 101.3 kPa of oxygen was applied to the SPS samples. Such treatment resulted in a heat capacity increment close to that obtained for the single crystal, probably due to annealing of the above-mentioned defects. The measured heat capacities of the studied materials were in good agreement with values calculated according to the Neumann-Kopp relation for mixed oxides.

Original language	American English
Pages (from-to)	123-126
Number of pages	4
Journal	Journal of Chemical Thermodynamics
Volume	93
DOIs	https://doi.org/10.1016/j.jct.2015.09.035
State	Published - 1 Feb 2016

Keywords

Calorimetry
Heat capacity
Nd:YAG
Spark plasma sintering
Yttrium aluminum garnet

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
General Materials Science
Physical and Theoretical Chemistry

Access to Document

https://doi.org/10.1016/j.jct.2015.09.035

Cite this

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title = "High-temperature heat capacity of SPS-processed Y3Al5O12 (YAG) and Nd:YAG",

abstract = "The molar heat capacity of spark plasma sintering-processed YAG and Nd:YAG (1 at.% Nd) and of single crystal Nd:YAG (1.1 at.% Nd) was evaluated by differential scanning calorimetry from between 298 K and 1623 K. The heat capacity data were fitted to an a+bT+CT-1 relation. As-sintered SPS samples exhibited lower heat capacity values than did the single crystal. To examine the influence of possible defects created within the SPS apparatus on heat capacity, post-sintering heat treatment at 1673 K in 101.3 kPa of oxygen was applied to the SPS samples. Such treatment resulted in a heat capacity increment close to that obtained for the single crystal, probably due to annealing of the above-mentioned defects. The measured heat capacities of the studied materials were in good agreement with values calculated according to the Neumann-Kopp relation for mixed oxides.",

keywords = "Calorimetry, Heat capacity, Nd:YAG, Spark plasma sintering, Yttrium aluminum garnet",

author = "S. Sagi and S. Hayun",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2016",

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T1 - High-temperature heat capacity of SPS-processed Y3Al5O12 (YAG) and Nd:YAG

AU - Sagi, S.

AU - Hayun, S.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - The molar heat capacity of spark plasma sintering-processed YAG and Nd:YAG (1 at.% Nd) and of single crystal Nd:YAG (1.1 at.% Nd) was evaluated by differential scanning calorimetry from between 298 K and 1623 K. The heat capacity data were fitted to an a+bT+CT-1 relation. As-sintered SPS samples exhibited lower heat capacity values than did the single crystal. To examine the influence of possible defects created within the SPS apparatus on heat capacity, post-sintering heat treatment at 1673 K in 101.3 kPa of oxygen was applied to the SPS samples. Such treatment resulted in a heat capacity increment close to that obtained for the single crystal, probably due to annealing of the above-mentioned defects. The measured heat capacities of the studied materials were in good agreement with values calculated according to the Neumann-Kopp relation for mixed oxides.

AB - The molar heat capacity of spark plasma sintering-processed YAG and Nd:YAG (1 at.% Nd) and of single crystal Nd:YAG (1.1 at.% Nd) was evaluated by differential scanning calorimetry from between 298 K and 1623 K. The heat capacity data were fitted to an a+bT+CT-1 relation. As-sintered SPS samples exhibited lower heat capacity values than did the single crystal. To examine the influence of possible defects created within the SPS apparatus on heat capacity, post-sintering heat treatment at 1673 K in 101.3 kPa of oxygen was applied to the SPS samples. Such treatment resulted in a heat capacity increment close to that obtained for the single crystal, probably due to annealing of the above-mentioned defects. The measured heat capacities of the studied materials were in good agreement with values calculated according to the Neumann-Kopp relation for mixed oxides.

KW - Calorimetry

KW - Heat capacity

KW - Nd:YAG

KW - Spark plasma sintering

KW - Yttrium aluminum garnet

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