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Garnet infrared windows.

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Title: Garnet infrared windows.
Authors: Akdim, Brahim1,2 (AUTHOR) brahim.akdim.ctr@us.af.mil, Drazin, John W.1,2 (AUTHOR), Schlup, Andrew1,2 (AUTHOR), Hay, Randall S.1 (AUTHOR), McGarvey, Seamus1,2 (AUTHOR), Urbas, Augustine1 (AUTHOR), Delcamp, Jared H.1 (AUTHOR)
Source: Journal of the American Ceramic Society. Sep2025, Vol. 108 Issue 9, p1-15. 15p.
Subjects: Bulk modulus, Density functional theory, Brillouin zones, Garnet, Thermophysical properties, Phonons
Abstract: The infrared (IR) transparency of garnets and cubic antimonates, with a structure similar to garnet, were determined by density functional theory (DFT) calculations. The maximum frequency at the Brillouin zone center was scaled by a factor of 2 to determine IR cutoff. DFT calculations for bulk modulus and bandgap were also done. The calculations were compared with transparency determined from digitized Fourier‐transform infrared (FTIR) spectra for powder and for bulk specimens. Trends for predictions from DFT calculations agree with those determined from FTIR and bulk spectra. Measurements of IR transmittance from room temperature to 1500°C were made for polycrystalline Y3Al5O12 (YAG) and single‐crystal Gd3Ga5O12 (GGG) garnet. Optical, structural, thermodynamic, and thermophysical properties from literature data were collected for a variety of garnet compositions, and where possible, compared with DFT calculations. Garnets with the best combinations of properties for windows are discussed. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="AR" term="%22Akdim%2C+Brahim%22">Akdim, Brahim</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> brahim.akdim.ctr@us.af.mil</i><br /><searchLink fieldCode="AR" term="%22Drazin%2C+John+W%2E%22">Drazin, John W.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schlup%2C+Andrew%22">Schlup, Andrew</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hay%2C+Randall+S%2E%22">Hay, Randall S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22McGarvey%2C+Seamus%22">McGarvey, Seamus</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Urbas%2C+Augustine%22">Urbas, Augustine</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Delcamp%2C+Jared+H%2E%22">Delcamp, Jared H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+American+Ceramic+Society%22">Journal of the American Ceramic Society</searchLink>. Sep2025, Vol. 108 Issue 9, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Bulk+modulus%22">Bulk modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Density+functional+theory%22">Density functional theory</searchLink><br /><searchLink fieldCode="DE" term="%22Brillouin+zones%22">Brillouin zones</searchLink><br /><searchLink fieldCode="DE" term="%22Garnet%22">Garnet</searchLink><br /><searchLink fieldCode="DE" term="%22Thermophysical+properties%22">Thermophysical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Phonons%22">Phonons</searchLink>
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  Data: The infrared (IR) transparency of garnets and cubic antimonates, with a structure similar to garnet, were determined by density functional theory (DFT) calculations. The maximum frequency at the Brillouin zone center was scaled by a factor of 2 to determine IR cutoff. DFT calculations for bulk modulus and bandgap were also done. The calculations were compared with transparency determined from digitized Fourier‐transform infrared (FTIR) spectra for powder and for bulk specimens. Trends for predictions from DFT calculations agree with those determined from FTIR and bulk spectra. Measurements of IR transmittance from room temperature to 1500°C were made for polycrystalline Y3Al5O12 (YAG) and single‐crystal Gd3Ga5O12 (GGG) garnet. Optical, structural, thermodynamic, and thermophysical properties from literature data were collected for a variety of garnet compositions, and where possible, compared with DFT calculations. Garnets with the best combinations of properties for windows are discussed. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of the American Ceramic Society is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1111/jace.20606
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Bulk modulus
        Type: general
      – SubjectFull: Density functional theory
        Type: general
      – SubjectFull: Brillouin zones
        Type: general
      – SubjectFull: Garnet
        Type: general
      – SubjectFull: Thermophysical properties
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      – SubjectFull: Phonons
        Type: general
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      – TitleFull: Garnet infrared windows.
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            NameFull: Akdim, Brahim
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            NameFull: Drazin, John W.
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            NameFull: Schlup, Andrew
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            NameFull: Delcamp, Jared H.
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            – D: 01
              M: 09
              Text: Sep2025
              Type: published
              Y: 2025
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              Value: 108
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