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King Abdulaziz University
Document Details
Document Type
Document Title
: Article In Conference
: Synthesis of Ni, Ni-Pand Ni-B nanoparticles
and their catalytic effect on the decomposition
of ammonium perchlorate
Synthesis of Ni, Ni-Pand Ni-B nanoparticles
and their catalytic effect on the decomposition
of ammonium perchlorate
Subject
Document
Language
Abstract
: ‫ءك يم يا‬
: English
: Crystalline Ni, amorphous Ni-P and Ni-B
nanoparticles with high purity have been
prepared by a modified electroless plating
method. The resulting samples were
characterized by transmission electron
microscope(TME),X-ray diffraction(XRD) and
the catalytic effect of them on the
decomposition of ammonium perchlorate(AP)
was investigated by DTA and TG. The results
indicates that Ni nanoparticles are spherical
shape with average size of about 60nm and
have cubic crystal structure and good
dispersibility ; Ni-P and Ni-B nanoparticles are
aggregation of ultrafine alloy particles with
relatively wide size distribution of 10～80 nm
and 30～50nm respectively and have
amorphous structure. Compared with the
thermal decomposition of pure AP, adding Ni
nanoparticles (5 wt.%) in AP, peak temperature
and terminal trmperature of low-temperature
decomposition are not evidently change but its
mass loss of low-temperature decomposition
increases by about 15%, and its peak
temperature and terminal trmperature of high-
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temperature decomposition decreases by about
53℃ and 72℃; adding Ni-P nanoparticles (5
wt.%) in AP, mass loss of low-temperature
decomposition is not distinctly changed but its
terminal temperature of low-temperature
decomposition decreases by about 26℃, and its
peak temperature and terminal temperature of
high-temperature thermal decomposition
decreases by about 80℃ and 67℃; however
adding Ni-Bnanoparticles (5 wt.%) in AP
significantly reduced its peak temperature of
high-temperature decomposition from 457.37℃
to 321.68℃ by about 125℃ and the peak of
high temperature decomposition disappeared,
which leades the whole thermal decomposition
stage shows one single exothermic peak at
321.68℃ and endes at 368.33℃. These effect
exhibited that these Ni, Ni-P and Ni-B
nanoparticles have significant catalytic effect
on both low-temperature and high-temperature
decomposition of AP , the effects are more
apparent on the stage of high-temperature
decomposition , and Ni-B nanoparticles have
the greastest influence on the high-temterature
decomposition of AP among the resulting
nanoparticles. Such results are useful for the
further studies of the controlled synthesis by
Electroless plating method of Ni-based
nanoparticles to be used in the AP-based
propellant.
: Tenth International Symposium on
Heterogeneous Catalysis
: From : 22/8/1429 AH - To : 26/8/1429 AH
From : 23/8/2008 AD - To : 27/8/2008 AD
: 1429 AH
2008 AD
: Article
: Sunday, February 22, 2009
Researchers
Researcher Name Researcher Name Researcher
Dr
Email
(Arabic)
(English)
Type
Grade
LI Ronga
LI Ronga
Researcher Doctorate
LIU Xiang-xuana LIU Xiang-xuana Researcher Doctorate
WANG Xuan-juna WANG Xuan-juna Researcher Doctorate
Files
File Name
18572.pdf
Type
pdf
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