Optical properties of powder and ceramics of aluminium oxynitride obtained by self-propagating high-temperature synthesis

T. G. Akopdzhanyan; A. A. Kondakov; S. I. Rupasov; A. P. Kozlova; Vladimirs Pankratovs

doi:10.3952/physics.v61i3.4516

Optical properties of powder and ceramics of aluminium oxynitride obtained by self-propagating high-temperature synthesis

T. G. Akopdzhanyan^*
, A. A. Kondakov
, S. I. Rupasov
, A. P. Kozlova
, Vladimirs Pankratovs

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

The synthesis method of aluminium oxynitride (AlON) powders by nitriding of Al/Al₂ O₃ mixture under high-pressure nitrogen is proposed. The novelty of this method consists in adding KClO₄ or Mg(ClO₄ )₂ and extra Al into the starting mixture (Al+Al₂ O₃ ) to cause the exothermal aluminium oxidation reaction, which therefore initiates the aluminium nitriding reaction. The microstructure and phase composition of the AlON powders obtained by self-propagating high-temperature synthesis are demonstrated by means of SEM and XRD analysis. Diffuse reflection spectra of AlON powders have been measured and the values of band-gap energy have been calculated. Optical transmission and reflection characteristics of the AlON ceramic samples sintered from AlON powders at 1930°C have been studied. The influence of the technological parameters of ceramics production on their transparency is revealed – the most transparent sample is obtained from the powders synthesized with the Mg(ClO₄ )₂ additive and sintered for 6 h.

Original language	English
Pages (from-to)	169-176
Number of pages	8
Journal	Lithuanian Journal of Physics
Volume	61
Issue number	3
DOIs	https://doi.org/10.3952/physics.v61i3.4516
Publication status	Published - 11 Oct 2021

Keywords

AlON
Aluminium oxynitride
Combustion
Optical properties
Self-propagating high-temperature synthesis
Transparent ceramics

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10.3952/physics.v61i3.4516

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@article{112b4623e8054e7d9fc1535d817797e3,

title = "Optical properties of powder and ceramics of aluminium oxynitride obtained by self-propagating high-temperature synthesis",

abstract = "The synthesis method of aluminium oxynitride (AlON) powders by nitriding of Al/Al2 O3 mixture under high-pressure nitrogen is proposed. The novelty of this method consists in adding KClO4 or Mg(ClO4 )2 and extra Al into the starting mixture (Al+Al2 O3 ) to cause the exothermal aluminium oxidation reaction, which therefore initiates the aluminium nitriding reaction. The microstructure and phase composition of the AlON powders obtained by self-propagating high-temperature synthesis are demonstrated by means of SEM and XRD analysis. Diffuse reflection spectra of AlON powders have been measured and the values of band-gap energy have been calculated. Optical transmission and reflection characteristics of the AlON ceramic samples sintered from AlON powders at 1930°C have been studied. The influence of the technological parameters of ceramics production on their transparency is revealed – the most transparent sample is obtained from the powders synthesized with the Mg(ClO4 )2 additive and sintered for 6 h.",

keywords = "AlON, Aluminium oxynitride, Combustion, Optical properties, Self-propagating high-temperature synthesis, Transparent ceramics",

author = "Akopdzhanyan, \{T. G.\} and Kondakov, \{A. A.\} and Rupasov, \{S. I.\} and Kozlova, \{A. P.\} and Vladimirs Pankratovs",

note = "Publisher Copyright: {\textcopyright} Lietuvos mokslų akademija, 2021.",

year = "2021",

month = oct,

day = "11",

doi = "10.3952/physics.v61i3.4516",

language = "English",

volume = "61",

pages = "169--176",

journal = "Lithuanian Journal of Physics",

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publisher = "Lithuanian Physical Society",

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TY - JOUR

T1 - Optical properties of powder and ceramics of aluminium oxynitride obtained by self-propagating high-temperature synthesis

AU - Akopdzhanyan, T. G.

AU - Kondakov, A. A.

AU - Rupasov, S. I.

AU - Kozlova, A. P.

AU - Pankratovs, Vladimirs

N1 - Publisher Copyright: © Lietuvos mokslų akademija, 2021.

PY - 2021/10/11

Y1 - 2021/10/11

N2 - The synthesis method of aluminium oxynitride (AlON) powders by nitriding of Al/Al2 O3 mixture under high-pressure nitrogen is proposed. The novelty of this method consists in adding KClO4 or Mg(ClO4 )2 and extra Al into the starting mixture (Al+Al2 O3 ) to cause the exothermal aluminium oxidation reaction, which therefore initiates the aluminium nitriding reaction. The microstructure and phase composition of the AlON powders obtained by self-propagating high-temperature synthesis are demonstrated by means of SEM and XRD analysis. Diffuse reflection spectra of AlON powders have been measured and the values of band-gap energy have been calculated. Optical transmission and reflection characteristics of the AlON ceramic samples sintered from AlON powders at 1930°C have been studied. The influence of the technological parameters of ceramics production on their transparency is revealed – the most transparent sample is obtained from the powders synthesized with the Mg(ClO4 )2 additive and sintered for 6 h.

AB - The synthesis method of aluminium oxynitride (AlON) powders by nitriding of Al/Al2 O3 mixture under high-pressure nitrogen is proposed. The novelty of this method consists in adding KClO4 or Mg(ClO4 )2 and extra Al into the starting mixture (Al+Al2 O3 ) to cause the exothermal aluminium oxidation reaction, which therefore initiates the aluminium nitriding reaction. The microstructure and phase composition of the AlON powders obtained by self-propagating high-temperature synthesis are demonstrated by means of SEM and XRD analysis. Diffuse reflection spectra of AlON powders have been measured and the values of band-gap energy have been calculated. Optical transmission and reflection characteristics of the AlON ceramic samples sintered from AlON powders at 1930°C have been studied. The influence of the technological parameters of ceramics production on their transparency is revealed – the most transparent sample is obtained from the powders synthesized with the Mg(ClO4 )2 additive and sintered for 6 h.

KW - AlON

KW - Aluminium oxynitride

KW - Combustion

KW - Optical properties

KW - Self-propagating high-temperature synthesis

KW - Transparent ceramics

UR - https://www.lmaleidykla.lt/ojs/index.php/physics/article/view/4516

UR - https://www.scopus.com/pages/publications/85120827378

U2 - 10.3952/physics.v61i3.4516

DO - 10.3952/physics.v61i3.4516

M3 - Article

SN - 1648-8504

VL - 61

SP - 169

EP - 176

JO - Lithuanian Journal of Physics

JF - Lithuanian Journal of Physics

IS - 3

ER -

Optical properties of powder and ceramics of aluminium oxynitride obtained by self-propagating high-temperature synthesis

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