Solid Solution Effects on the Thermal Properties in the MgAl₂O₄-MgGa₂O₄ System

Kelley R. Wilkerson; Jeffrey D. Smith; Todd P. Sander; James Gordon Hemrick

doi:10.1111/jace.12125

Solid Solution Effects on the Thermal Properties in the MgAl₂O₄-MgGa₂O₄ System

Kelley R. Wilkerson
, Jeffrey D. Smith
, Todd P. Sander
, James Gordon Hemrick

Materials Science and Engineering

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

Abstract

Solid solution effects on thermal conductivity within the MgO-Al ₂ O ₃ -Ga ₂ O ₃ system were studied. Samples with systematically varied additions of MgGa ₂ O ₄ -MgAl ₂ O ₄ were prepared and the laser flash technique was used to determine thermal diffusivity at temperatures between 200°C and 1300°C. Heat capacity as a function of temperature from room temperature to 800°C was also determined using differential scanning calorimetry (DSC). Solid solution in the MgAl ₂ O ₄ -MgGa ₂ O ₄ system decreases the thermal conductivity up to 1000°C. At 200°C thermal conductivity decreased 24% with a 5 mol% addition of MgGa ₂ O ₄ to the system. At 1000°C, the thermal conductivity decreased 13% with a 5 mol% addition. Steady-state calculations showed a 12.5% decrease in heat flux with 5 mol% MgGa ₂ O ₄ considered across a 12 inch thickness.

Original language	American English
Pages (from-to)	859-866
Number of pages	8
Journal	Journal of the American Ceramic Society
Volume	96
Issue number	3
DOIs	https://doi.org/10.1111/jace.12125
State	Published - Mar 1 2013

Keywords

Laser flash techniques
MgAl
Room temperature
Solution effects, Differential scanning calorimetry
Heat flux
Solid solutions, Thermal conductivity

Disciplines

Materials Science and Engineering

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10.1111/jace.12125License: CC BY

http://doi.org/10.1111/jace.12125

Cite this

@article{6a063d181890448988f880d38fb5a1b2,

title = "Solid Solution Effects on the Thermal Properties in the MgAl₂O₄-MgGa₂O₄ System",

abstract = " Solid solution effects on thermal conductivity within the MgO-Al 2 O 3 -Ga 2 O 3 system were studied. Samples with systematically varied additions of MgGa 2 O 4 -MgAl 2 O 4 were prepared and the laser flash technique was used to determine thermal diffusivity at temperatures between 200°C and 1300°C. Heat capacity as a function of temperature from room temperature to 800°C was also determined using differential scanning calorimetry (DSC). Solid solution in the MgAl 2 O 4 -MgGa 2 O 4 system decreases the thermal conductivity up to 1000°C. At 200°C thermal conductivity decreased 24\% with a 5 mol\% addition of MgGa 2 O 4 to the system. At 1000°C, the thermal conductivity decreased 13\% with a 5 mol\% addition. Steady-state calculations showed a 12.5\% decrease in heat flux with 5 mol\% MgGa 2 O 4 considered across a 12 inch thickness.",

keywords = "Laser flash techniques, MgAl, Room temperature, Solution effects, Differential scanning calorimetry, Heat flux, Solid solutions, Thermal conductivity",

author = "Wilkerson, \{Kelley R.\} and Smith, \{Jeffrey D.\} and Sander, \{Todd P.\} and Hemrick, \{James Gordon\}",

year = "2013",

month = mar,

day = "1",

doi = "10.1111/jace.12125",

language = "American English",

volume = "96",

pages = "859--866",

journal = "Journal of the American Ceramic Society",

issn = "1551-2916",

number = "3",

}

TY - JOUR

T1 - Solid Solution Effects on the Thermal Properties in the MgAl₂O₄-MgGa₂O₄ System

AU - Wilkerson, Kelley R.

AU - Smith, Jeffrey D.

AU - Sander, Todd P.

AU - Hemrick, James Gordon

PY - 2013/3/1

Y1 - 2013/3/1

N2 - Solid solution effects on thermal conductivity within the MgO-Al 2 O 3 -Ga 2 O 3 system were studied. Samples with systematically varied additions of MgGa 2 O 4 -MgAl 2 O 4 were prepared and the laser flash technique was used to determine thermal diffusivity at temperatures between 200°C and 1300°C. Heat capacity as a function of temperature from room temperature to 800°C was also determined using differential scanning calorimetry (DSC). Solid solution in the MgAl 2 O 4 -MgGa 2 O 4 system decreases the thermal conductivity up to 1000°C. At 200°C thermal conductivity decreased 24% with a 5 mol% addition of MgGa 2 O 4 to the system. At 1000°C, the thermal conductivity decreased 13% with a 5 mol% addition. Steady-state calculations showed a 12.5% decrease in heat flux with 5 mol% MgGa 2 O 4 considered across a 12 inch thickness.

AB - Solid solution effects on thermal conductivity within the MgO-Al 2 O 3 -Ga 2 O 3 system were studied. Samples with systematically varied additions of MgGa 2 O 4 -MgAl 2 O 4 were prepared and the laser flash technique was used to determine thermal diffusivity at temperatures between 200°C and 1300°C. Heat capacity as a function of temperature from room temperature to 800°C was also determined using differential scanning calorimetry (DSC). Solid solution in the MgAl 2 O 4 -MgGa 2 O 4 system decreases the thermal conductivity up to 1000°C. At 200°C thermal conductivity decreased 24% with a 5 mol% addition of MgGa 2 O 4 to the system. At 1000°C, the thermal conductivity decreased 13% with a 5 mol% addition. Steady-state calculations showed a 12.5% decrease in heat flux with 5 mol% MgGa 2 O 4 considered across a 12 inch thickness.

KW - Laser flash techniques

KW - MgAl

KW - Room temperature

KW - Solution effects, Differential scanning calorimetry

KW - Heat flux

KW - Solid solutions, Thermal conductivity

UR - https://scholarsmine.mst.edu/matsci_eng_facwork/495

UR - http://doi.org/10.1111/jace.12125

U2 - 10.1111/jace.12125

DO - 10.1111/jace.12125

M3 - Article

SN - 1551-2916

VL - 96

SP - 859

EP - 866

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 3

ER -

Solid Solution Effects on the Thermal Properties in the MgAl₂O₄-MgGa₂O₄ System

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