Advanced manufacturing process of ultrahigh-purity α-Al2O3

Abstract

An advanced method was investigated for production of ultrahigh-purity alumina α-Al₂O₃ (UHPA, 99.999%) with an oxidation of aluminum (purity 99.7%) granules in 0.1 g/mol aqueous solution of potassium hydroxide with a subsequent hydrochloric acid treatment and calcination of the oxidation product at 1450 °C. The evolution of impurities concentration after subsequent acid and thermal treatment was studied. The total concentration of impurities and especially iron impurity was decreased in UHPA while the concentration of alkali metals (K, Na, Li), on the contrary, was increased by the used production method (Al granules → reaction with alkali → acidic treatment + washing → thermal treatment). The proposed method allowed production of UHPA with purity 99.99% and 99.999% from pellets with the initial purity of aluminum 99.70% and 99.99% respectively. The advantage of the studied method of UHPA production is it's low cost and utility.

Original language	English
Article number	e00065
Journal	Sustainable Materials and Technologies
Volume	17
DOIs	https://doi.org/10.1016/j.susmat.2018.e00065
Publication status	Published - 1 Sep 2018

Keywords

Aluminum
Impurities
Treatment
Ultrahigh-purity alumina

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Waste Management and Disposal
Industrial and Manufacturing Engineering

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10.1016/j.susmat.2018.e00065

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Ambaryan, G. N., Vlaskin, M. S., Buryakovskaya, O. A., Kislenko, S. A., Zhuk, A. Z., Shkolnikov, E. I., Arnautov, A. N., Zmanovsky, S. V., Osipenkova, A. A., Tarasov, V. P., & Gromov, A. A. (2018). Advanced manufacturing process of ultrahigh-purity α-Al₂O₃. Sustainable Materials and Technologies, 17, [e00065]. https://doi.org/10.1016/j.susmat.2018.e00065

Advanced manufacturing process of ultrahigh-purity α-Al₂O₃. / Ambaryan, G. N.; Vlaskin, M. S.; Buryakovskaya, O. A.; Kislenko, S. A.; Zhuk, A. Z.; Shkolnikov, E. I.; Arnautov, A. N.; Zmanovsky, S. V.; Osipenkova, A. A.; Tarasov, V. P.; Gromov, A. A.

In: Sustainable Materials and Technologies, Vol. 17, e00065, 01.09.2018.

Research output: Contribution to journal › Article

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title = "Advanced manufacturing process of ultrahigh-purity α-Al2O3",

abstract = "An advanced method was investigated for production of ultrahigh-purity alumina α-Al2O3 (UHPA, 99.999%) with an oxidation of aluminum (purity 99.7%) granules in 0.1 g/mol aqueous solution of potassium hydroxide with a subsequent hydrochloric acid treatment and calcination of the oxidation product at 1450 °C. The evolution of impurities concentration after subsequent acid and thermal treatment was studied. The total concentration of impurities and especially iron impurity was decreased in UHPA while the concentration of alkali metals (K, Na, Li), on the contrary, was increased by the used production method (Al granules → reaction with alkali → acidic treatment + washing → thermal treatment). The proposed method allowed production of UHPA with purity 99.99% and 99.999% from pellets with the initial purity of aluminum 99.70% and 99.99% respectively. The advantage of the studied method of UHPA production is it's low cost and utility.",

keywords = "Aluminum, Impurities, Treatment, Ultrahigh-purity alumina",

author = "Ambaryan, {G. N.} and Vlaskin, {M. S.} and Buryakovskaya, {O. A.} and Kislenko, {S. A.} and Zhuk, {A. Z.} and Shkolnikov, {E. I.} and Arnautov, {A. N.} and Zmanovsky, {S. V.} and Osipenkova, {A. A.} and Tarasov, {V. P.} and Gromov, {A. A.}",

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AU - Ambaryan, G. N.

AU - Vlaskin, M. S.

AU - Buryakovskaya, O. A.

AU - Kislenko, S. A.

AU - Zhuk, A. Z.

AU - Shkolnikov, E. I.

AU - Arnautov, A. N.

AU - Zmanovsky, S. V.

AU - Osipenkova, A. A.

AU - Tarasov, V. P.

AU - Gromov, A. A.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - An advanced method was investigated for production of ultrahigh-purity alumina α-Al2O3 (UHPA, 99.999%) with an oxidation of aluminum (purity 99.7%) granules in 0.1 g/mol aqueous solution of potassium hydroxide with a subsequent hydrochloric acid treatment and calcination of the oxidation product at 1450 °C. The evolution of impurities concentration after subsequent acid and thermal treatment was studied. The total concentration of impurities and especially iron impurity was decreased in UHPA while the concentration of alkali metals (K, Na, Li), on the contrary, was increased by the used production method (Al granules → reaction with alkali → acidic treatment + washing → thermal treatment). The proposed method allowed production of UHPA with purity 99.99% and 99.999% from pellets with the initial purity of aluminum 99.70% and 99.99% respectively. The advantage of the studied method of UHPA production is it's low cost and utility.

AB - An advanced method was investigated for production of ultrahigh-purity alumina α-Al2O3 (UHPA, 99.999%) with an oxidation of aluminum (purity 99.7%) granules in 0.1 g/mol aqueous solution of potassium hydroxide with a subsequent hydrochloric acid treatment and calcination of the oxidation product at 1450 °C. The evolution of impurities concentration after subsequent acid and thermal treatment was studied. The total concentration of impurities and especially iron impurity was decreased in UHPA while the concentration of alkali metals (K, Na, Li), on the contrary, was increased by the used production method (Al granules → reaction with alkali → acidic treatment + washing → thermal treatment). The proposed method allowed production of UHPA with purity 99.99% and 99.999% from pellets with the initial purity of aluminum 99.70% and 99.99% respectively. The advantage of the studied method of UHPA production is it's low cost and utility.

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