自蔓延高温合成氧氮化铝粉末和陶瓷的光学性能

IF 0.3 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Lithuanian Journal of Physics Pub Date : 2021-10-11 DOI:10.3952/physics.v61i3.4516

T. Akopdzhanyan, A. A. Kondakov, S. Rupasov, A. Kozlova, V. Pankratov

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引用次数: 1

摘要

提出了用Al/Al2O3混合物在高压氮气条件下氮化制备氧化氮化铝(AlON)粉末的方法。该方法的新颖之处在于在起始混合物(Al+Al2O3)中加入KClO4或Mg(ClO4)2和额外的Al，引起铝的放热氧化反应，从而引发铝氮化反应。通过SEM和XRD分析，对高温自扩散合成的AlON粉末的微观结构和相组成进行了表征。测量了AlON粉末的漫反射光谱，计算了带隙能。研究了用AlON粉末在1930℃下烧结的AlON陶瓷样品的光透射和反射特性。揭示了陶瓷生产工艺参数对其透明度的影响——用Mg(ClO4)2添加剂合成的粉末烧结6h得到的样品透明度最高。

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

The synthesis method of aluminium oxynitride (AlON) powders by nitriding of Al/Al2O3 mixture under highpressure nitrogen is proposed. The novelty of this method consists in adding KClO4 or Mg(ClO4)2 and extra Al into the starting mixture (Al+Al2O3) 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.

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来源期刊

Lithuanian Journal of Physics 物理-物理：综合

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： The main aim of the Lithuanian Journal of Physics is to reflect the most recent advances in various fields of theoretical, experimental, and applied physics, including: mathematical and computational physics; subatomic physics; atoms and molecules; chemical physics; electrodynamics and wave processes; nonlinear and coherent optics; spectroscopy.