Surface activities of silica powders produced by milling

Two silica powders (IOTA and SFP) were mechanically modified using milling. Three different rotation speeds (100, 200, 300rpm), milling times (15, 30, 60min) and ball sizes (01, 05, 10mm) were tested. The effect of milling conditions on dissolved silicon ions into ammonia solution was investigated....

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Bibliographic Details
Published in:AIP conference proceedings 2022-08, Vol.2610 (1)
Main Authors: Hien, Tran Thi Thu, Shirai, Takashi, Fuji, Masayoshi, Dung, Ngo Quoc
Format: Article
Language:English
Subjects:
Ammonia
Shaking
Silicon dioxide
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Summary:Two silica powders (IOTA and SFP) were mechanically modified using milling. Three different rotation speeds (100, 200, 300rpm), milling times (15, 30, 60min) and ball sizes (01, 05, 10mm) were tested. The effect of milling conditions on dissolved silicon ions into ammonia solution was investigated. The relationship between amounts of dissolved Si4+ ion into ammonia solution and shaking time at different milling conditions of raw and treated two powders were observed. For the amorphous powder, the specific surface activity measured by the dissolved Si ion at 20h shaking time increased from 950 to an average of 1700 ppm.m−2 at 100rpm and 15min milling time. By further increasing the speed to 200rpm and the milling time to 30min the surface activity increased only by 13.6 and 10.6 % respectively. Furthermore, the surface activity did not increase further by increasing the speed to 300rpm and the milling time to 60min. The results were not affected by the ball size. By milling treatment, the amount of dissolved silicon ion increases 88% and 63% corresponding to crystalline and amorphous powder.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0099592