Synthesis of Nanoparticles in a High-gravity System
Date Issued
2004-11-02
Date
2004-11-02
Author(s)
戴怡德
DOI
922214E002008
Abstract
This research project was to investigate
the effects of operating variables on particle
size and shape in the synthesis of magnesium
oxide nanoparticles, using a high-gravity
technique. First, magnesium hydroxide was
synthesized in the high-gravity system by a
continuous, liquid-liquid phase reaction. Then
high purity, spherical magnesium oxide
nanoparticles with cubic crystal structure, was
obtained after calcination. In this report,
effects of each operating variables on the
particle size distribution were studied.
Uniform magnesium hydroxide nanoparticles with a size less than 100nm, using a scanning
electron microscopy (SEM), could be obtained
when a 0.83M magnesium chloride solution
was reacted with a 1.66M sodium hydroxide
solution. Both liquid flowrates were 0.2L/min
and the disk rotating rate was 2000rpm. This
magnesium hydroxide powder was dispersed by
adding poly(acrylic acid, sodium salt), and their
number mean size distribution was about 50nm
measured by a dynamic light scattering analyzer.
Magnesium hydroxide synthesized by the
high-gravity system could be calcined by a
programmed heating up to 600 ℃ to get
magnesium oxide nanoparticles with a size
about 50nm.
Subjects
high-gravity
magnesium oxide
magnesium hydroxide
rotating
packed-bed
packed-bed
Publisher
臺北市：國立臺灣大學化學工程學系暨研究所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
922214E002008.pdf
Size
409.49 KB
Format
Adobe PDF
Checksum
(MD5):b2c706300d45a4b2817cd60d987db898