ISSN:
1573-4870
Keywords:
Mechanochemistry
;
milling
;
aluminium hydroxide
;
consolidation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Aluminium hydroxide (Al(OH)3) was mechanically activated by dry milling. In order to develop an inorganic consolidated material, the structure and reactivity of milled Al(OH)3 were investigated and consolidated bodies were prepared using the reaction between activated Al(OH)3 and a potassium silicate solution. Milling up to 1 h apparently reduced the grain size and promoted amorphization, although milling longer than 2 h did not give a significant physical change. Milled Al(OH)3 directly transformed to χ-Al2O3 around 270°C. The transformation temperature decreased with increasing milling time. The remarkable enhancement of the reactivity was attained. The reactivity of Al(OH)3 milled for 2 h improved 1000 times more than that of as-received Al(OH)3. The preforming paste, prepared with as-received Al(OH)3, could not consolidate at room temperature without drying. On the other hand, for Al(OH)3 milled for 2 h, the preforming paste consolidated in 10 min and the consolidated material showed much better resistance against water than that prepared with as-received Al(OH)3. The possibility of a new inorganic consolidated material was suggested using the reaction between mechanically activated Al(OH)3 and the potassium silicate solution.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1011306814415
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