Effect of ultrasound on the dissolution-precipitation process in the aluminum hydroxide-water system

Naoya Enomoto; Masumi Katsumoto; Zenbe e. Nakagawa

doi:10.2109/jcersj.102.1105

Effect of ultrasound on the dissolution-precipitation process in the aluminum hydroxide-water system

Naoya Enomoto, Masumi Katsumoto, Zenbe e. Nakagawa

Applied Fine Chemistry

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

21 Citations (Scopus)

Abstract

Precipitation and ripening of an amorphous aluminogel in an aqueous solution were subjected to irradiation of ultrasound with various intensities at different frequencies. For comparison with the ripening of aluminogels, hydration of amorphous alumina powder in ultrasonic-driven water was studied. It was found that an intensive ultrasound during ripening decreased the relative amount of bayerite, which is a product in the ripening of the amorphous gels, whereas, a moderate ultrasound during ripening increased the relative amount of bayerite. On the other hand, the relative amount of bayerite increased when the gels were precipitated ultrasonically and ripened normally. The role of ultrasound in the ripening (dissolution-precipitation) process is discussed.

Original language	English
Pages (from-to)	1105-1110
Number of pages	6
Journal	Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume	102
DOIs	https://doi.org/10.2109/jcersj.102.1105
Publication status	Published - 1994

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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abstract = "Precipitation and ripening of an amorphous aluminogel in an aqueous solution were subjected to irradiation of ultrasound with various intensities at different frequencies. For comparison with the ripening of aluminogels, hydration of amorphous alumina powder in ultrasonic-driven water was studied. It was found that an intensive ultrasound during ripening decreased the relative amount of bayerite, which is a product in the ripening of the amorphous gels, whereas, a moderate ultrasound during ripening increased the relative amount of bayerite. On the other hand, the relative amount of bayerite increased when the gels were precipitated ultrasonically and ripened normally. The role of ultrasound in the ripening (dissolution-precipitation) process is discussed.",

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N2 - Precipitation and ripening of an amorphous aluminogel in an aqueous solution were subjected to irradiation of ultrasound with various intensities at different frequencies. For comparison with the ripening of aluminogels, hydration of amorphous alumina powder in ultrasonic-driven water was studied. It was found that an intensive ultrasound during ripening decreased the relative amount of bayerite, which is a product in the ripening of the amorphous gels, whereas, a moderate ultrasound during ripening increased the relative amount of bayerite. On the other hand, the relative amount of bayerite increased when the gels were precipitated ultrasonically and ripened normally. The role of ultrasound in the ripening (dissolution-precipitation) process is discussed.

AB - Precipitation and ripening of an amorphous aluminogel in an aqueous solution were subjected to irradiation of ultrasound with various intensities at different frequencies. For comparison with the ripening of aluminogels, hydration of amorphous alumina powder in ultrasonic-driven water was studied. It was found that an intensive ultrasound during ripening decreased the relative amount of bayerite, which is a product in the ripening of the amorphous gels, whereas, a moderate ultrasound during ripening increased the relative amount of bayerite. On the other hand, the relative amount of bayerite increased when the gels were precipitated ultrasonically and ripened normally. The role of ultrasound in the ripening (dissolution-precipitation) process is discussed.

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