Biomedical Engineering Reference
In-Depth Information
in numerous studies of UDD [25, 28, 29, 34, 35, 55]. The broad
absorption band with the peak near 3400 cm
1
and the peak at
1
1630 cm
are assigned to the hydroxyl groups. These bands result
mainly from water molecules adsorbed from the ambient atmosphere,
as they can be reversibly diminished by simple evacuation of UDD
samples under heating to 100-200°C [56, 66]. The features near
2900 cm
-1
are due to C-H vibrations. The peak in the region 1720-
1
1850 cm
is related to C-O vibration in oxygen-containing groups
with various configurations. The complex absorption band in the
range 1400-900 cm
-1
is the superposition of absorption peaks due
to nitrogen centers in diamond lattice, CO-, CH-, OH- groups, etc.
Table 6.1
Some properties of UDD of different types used in the work
Detonation
media;
purification
agents
Main
impurities 2
(%)
Specific
surface 3
(m 2 /g)
Volatile
abundance 4
rel. units
Sedimentation
stability in
water 5
Sample 1
(Producer)
CH-7
(Research
Institute of
Technical
Physics, Russia)
Ice
CrO
Cr (0, 32)
Si (0, 21)
Fe
S
310
1, 0
High
3
H
SO
2
4
S-1
(Research
Institute of
Technical
Physics, Russia)
Ice
Ozone
Si (0, 08)
S (0, 04)
Fe (0, 06)
2, 2
Very high
K-2
(Krasnoyarsk
State
University)
Carbon
dioxide
В
Ca (0, 55)
Fe (0, 16)
Cl (0, 07)
B
290
2, 0
High
О
3
HClO
2
4
В-1
(Sci. Manuf. Co.
“Altai”)
Carbon
dioxide
HNO
S (0, 4)
Fe (0, 38)
Ca (0, 1)
Si (0, 03)
2, 1
Low
, H
SO
3
2
4
А-1
(Research
Institute of
Experimental
Physics, Russia)
Water
Mineral
acids + HF
Cl (0, 9)
Fe (0, 15)
S (0, 06)
225-275*
1, 2
Medium
А-2
(Research
Institute of
Experimental
Physics, Russia)
Water
CrO
Si (0, 27)
S (0, 25)
Cl (0, 18)
Cr
225-275* 0, 9
Very low
3
H
SO
2
4
Search WWH ::




Custom Search