Research of the thermal desorption processes in oxide mixtures at laser effect
To investigate the physical-chemical processes occurring during the heating stage of spent nuclear fuel magneto plasma reprocessing a study of thermal desorption of oxides and oxide mixtures as SNF simulators under the influence of stationary laser radiation are being studied. Preliminary experiment...
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| Cite this: | Research of the thermal desorption processes in oxide mixtures at laser effect / V.V. Katrechko, D.V. Vinnikov, V.B. Yuferov, V.O. Ilichova, A.S. Svichkar, I.V. Buravilov, V.D. Timofeev, O.G. Bobrov // Problems of atomic science and tecnology. — 2020. — № 1. — С. 191-194. — Бібліогр.: 6 назв. — англ. |
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nasplib_isofts_kiev_ua-123456789-1947562025-02-09T22:40:32Z Research of the thermal desorption processes in oxide mixtures at laser effect Дослідження термодесорбції оксидних сумішей при лазерному впливі Исследование термодесорбции оксидных смесей при лазерном воздействии Katrechko, V.V. Vinnikov, D.V. Yuferov, V.B. Ilichova, V.O. Svichkar, A.S. Buravilov, I.V. Timofeev, V.D. Bobrov, O.G. Physics and the technology of construction materials To investigate the physical-chemical processes occurring during the heating stage of spent nuclear fuel magneto plasma reprocessing a study of thermal desorption of oxides and oxide mixtures as SNF simulators under the influence of stationary laser radiation are being studied. Preliminary experiments were carried out. X-ray diffraction and energy dispersive X-ray microanalysis of the film deposited on the substrate after laser influence on a mixture of B₂O₃/ZrO₂ oxides have been performed. Для вивчення фізико-хімічних процесів, що відбуваються на стадії нагріву магнітоплазмової переробки відпрацьованого ядерного палива (ВЯП), проводиться дослідження процесів термодесорбції оксидів і оксидних сумішей - імітаторів ВЯП при впливі стаціонарного лазерного випромінювання. Проведено попередні експерименти, виконані рентгенодифракційний і енергодисперсійний рентгенівський мікроаналізи плівки, осадженої на підкладку після лазерного впливу на суміш оксидів B₂O₃/ZrO₂. Для изучения физико-химических процессов, происходящих на стадии нагрева магнитоплазменной переработки отработавшего ядерного топлива (ОЯТ), проводится исследование термодесорбции оксидов и оксидных смесей – имитаторов ОЯТ при воздействии стационарного лазерного излучения. Проведены предварительные эксперименты, выполнены рентгенодифракционный и энергодисперсионный рентгеновский микроанализы пленки, осажденной на подложку при лазерном воздействии на смесь оксидов B₂O₃/ZrO₂. Special thanks for providing equipment and assistance in the experiments to team of co-authors of research laboratory (armored weapons and military equipment) of the Faculty of Military Training of the National Technical University “Kharkiv Polytechnic Institute” in person V.D. Timofeev and O.G. Bobrov. 2020 Article Research of the thermal desorption processes in oxide mixtures at laser effect / V.V. Katrechko, D.V. Vinnikov, V.B. Yuferov, V.O. Ilichova, A.S. Svichkar, I.V. Buravilov, V.D. Timofeev, O.G. Bobrov // Problems of atomic science and tecnology. — 2020. — № 1. — С. 191-194. — Бібліогр.: 6 назв. — англ. 1562-6016 PACS: 28.41Kw https://nasplib.isofts.kiev.ua/handle/123456789/194756 en Вопросы атомной науки и техники application/pdf Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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Physics and the technology of construction materials Physics and the technology of construction materials |
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Physics and the technology of construction materials Physics and the technology of construction materials Katrechko, V.V. Vinnikov, D.V. Yuferov, V.B. Ilichova, V.O. Svichkar, A.S. Buravilov, I.V. Timofeev, V.D. Bobrov, O.G. Research of the thermal desorption processes in oxide mixtures at laser effect Вопросы атомной науки и техники |
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To investigate the physical-chemical processes occurring during the heating stage of spent nuclear fuel magneto plasma reprocessing a study of thermal desorption of oxides and oxide mixtures as SNF simulators under the influence of stationary laser radiation are being studied. Preliminary experiments were carried out. X-ray diffraction and energy dispersive X-ray microanalysis of the film deposited on the substrate after laser influence on a mixture of B₂O₃/ZrO₂ oxides have been performed. |
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| author |
Katrechko, V.V. Vinnikov, D.V. Yuferov, V.B. Ilichova, V.O. Svichkar, A.S. Buravilov, I.V. Timofeev, V.D. Bobrov, O.G. |
| author_facet |
Katrechko, V.V. Vinnikov, D.V. Yuferov, V.B. Ilichova, V.O. Svichkar, A.S. Buravilov, I.V. Timofeev, V.D. Bobrov, O.G. |
| author_sort |
Katrechko, V.V. |
| title |
Research of the thermal desorption processes in oxide mixtures at laser effect |
| title_short |
Research of the thermal desorption processes in oxide mixtures at laser effect |
| title_full |
Research of the thermal desorption processes in oxide mixtures at laser effect |
| title_fullStr |
Research of the thermal desorption processes in oxide mixtures at laser effect |
| title_full_unstemmed |
Research of the thermal desorption processes in oxide mixtures at laser effect |
| title_sort |
research of the thermal desorption processes in oxide mixtures at laser effect |
| publisher |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
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2020 |
| topic_facet |
Physics and the technology of construction materials |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/194756 |
| citation_txt |
Research of the thermal desorption processes in oxide mixtures at laser effect / V.V. Katrechko, D.V. Vinnikov, V.B. Yuferov, V.O. Ilichova, A.S. Svichkar, I.V. Buravilov, V.D. Timofeev, O.G. Bobrov // Problems of atomic science and tecnology. — 2020. — № 1. — С. 191-194. — Бібліогр.: 6 назв. — англ. |
| series |
Вопросы атомной науки и техники |
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| first_indexed |
2025-12-01T11:39:12Z |
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2025-12-01T11:39:12Z |
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ISSN 1562-6016. ВАНТ. 2020. №1(125) 191
RESEARCH OF THE THERMAL DESORPTION PROCESSES
IN OXIDE MIXTURES AT LASER EFFECT
V.V. Katrechko
1
, D.V. Vinnikov
1
, V.B. Yuferov
1
, V.O. Ilichova
1
, A.S. Svichkar
1
,
I.V. Buravilov
1
, V.D. Timofeev
2
, O.G. Bobrov
2
1
National Science Center “Kharkov Institute of Physics and Technology”, Kharkiv, Ukraine;
2
Military Institute of Tank Forces National Technical University
“Kharkiv Polytechnic Institute”, Kharkiv, Ukraine
E-mail: v.yuferov@kipt.kharkov.ua
To investigate the physical-chemical processes occurring during the heating stage of spent nuclear fuel magneto
plasma reprocessing a study of thermal desorption of oxides and oxide mixtures as SNF simulators under the
influence of stationary laser radiation are being studied. Preliminary experiments were carried out. X-ray diffraction
and energy dispersive X-ray microanalysis of the film deposited on the substrate after laser influence on a mixture of
B2O3/ZrO2 oxides have been performed.
PACS: 28.41Kw
INTRODUCTION
Magneto plasma reprocessing of spent nuclear fuel
(SNF), which is an alternative to the radiochemical
methods involves the use of physical methods for a
cleanup of a multicomponent composition of spent fuel
from fission products (FPs) at heating, ionization and
plasma rotating in crossed EB fields [1].
At the stage of SNF heating (~ 2800 K) due to the
difference of physicаl-chemical properties (melting
point, vapor pressure) up to 75% FPs can be removed
[2]. These are mainly gases, volatile compounds and
oxides with a low binding energy.
Investigation of thermal desorption processes for
oxide compounds and their mixtures at heating stage
will allow us to study the features of
SNF multicomponent composition to reduce energy
losses during conversion to plasma.
To accelerate the process of thermal desorption at
the stage of SNF heating, it is advisable to
preliminarily grinding the working substance to a
micropowder with particle sizes of 1050 m [3].
Micropowder heating under atmospheric conditions
can be accomplished using a laser. Knowing the specific
power of the light flux onto the surface of the material,
we can estimate the temperature to which the
micropowder will be heated according Stefan-
Boltzmann law:
Q = T
4
, (1)
where is the emissivity of the grey body; – Stefan-
Boltzmann constant; Т – temperature; Q is the amount
of energy emitted by an object per unit area.
When a laser beam hits the surface of individual
particles, the radiation partially reflects and partially
penetrates deeper, where it is absorbed and released in
the form of heat. At low power densities of the absorbed
laser radiation (q ≤ 10
4
W/cm
2
), the laser action on the
material is associated with the processes of melting,
evaporation, and ablation [4].
PRELIMINARY EXPERIMENTS
It is advisable to carry out the experiments on the
study of thermal desorption with non-radioactive
substances that are simulators of nuclear material. Since
uranium oxide fuel is widely used as fuel in power
reactors, it isadvisable to choose oxides, for example,
zirconium oxide (ZrO2) and boron oxide (B2O3). In the
imitation experiments the carbonates of rare earth
elements can be used, for example, neodymium
carbonate (Nd2(CO3)3) to produce neodymium oxide
(Nd2O3), which is present in SNF and has similar
properties with uranium dioxide (UO2). For obtaining of
barium oxide (BaO) barium sulfate (BaSO4) can be used
(Table 1).
For micropowders heating carbon dioxide CO2PL-
1600 laser with a maximum power of the continuous-
wave Wmax= 80 W. When the efficiency of a carbon
dioxide laser is about 20%, the total energy
consumptions at 400 W. The beam diameter was 2 mm.
The duration of exposure time was 3060 s. In the
experiments, the power was adjusted from 10 to 100%.
Table 1
Chemical compounds used in the experiments and their properties
Compound amu Tm.р., K Tb.p, K Tdec, K
B2O3 69 753 2133
BaSO4 233 1850 – > 1850
BaO (decomposition
product)
153 2196 2273 –
ZrO2 123 2988 4573 –
Nd2(CO3)3 468 – – 8001150
Nd2O3 (decomposition
product)
336 2273 4033 –
mailto:v.yuferov@kipt.kharkov.ua
192 ISSN 1562-6016. ВАНТ. 2020. №1(125)
When the laser beam hits the normal to the surface
where the working micropowder is located, the
maximum specific power of the laser radiation is:
Q = Wmax/r
2
.
(2)
In our case Q = 2.5410
3
W/cm
2
.
Substituting the value of Q in relation (1), we can
determine the maximum temperature of thermal
radiation from the surface of the working substance. We
use the experimental data of for ZrO2 [5] at
temperatures > 2000 K. Note that for Т = 20002400 K
corresponds to a value of 0.80.9 and with a further
increase in temperature is in the same range that is
shown in Fig. 1. For these values of and Wmax we can
determine Tmax = 45004800 K from relation (1).
Fig. 1. Dependence of the radiation specific power on
the temperature of ZrO2
When boron oxide B2O3 is irradiated (Fig. 2) by a
laser, active evaporation is observed followed by B2O3
deposition on the substrate. After 30 s of the laser beam
effect at maximum power ablation of the working
substance and appearance of vapor were visually
observed. The vapor effect can be explained by the
storage conditions of the initial samples of boron oxide
in atmospheric conditions. Boron oxide interacts with
water vapor, which is part of the air atmosphere, and
under laser irradiation, the evaporation of the material is
accompanied by a vapor phase.
Fig. 2. B2O3 micropowder under laser beam effect
At stationary laser irradiation of zirconium oxide
(ZrO2), the intense luminescence and local heating of
the working substance at the site of impact of the laser
beam was observed (Fig. 3).
A micropowder of BaSO4 was used for BaO
obtaining that upon heating by the laser beam is
decomposed into three components according to the
chemical reaction:
BaSO4→BaO+ SO2+О2 (~ 1870 К).
Fig. 3. ZrO2 micropowder under laser beam effect
In this case, SO2 reacts with atmospheric
components and volatilizes.
By analogy with BaSO4 laser beam effect on the
carbonate of neodymium (Nd2(CO3)3) allows to obtain
neodymium oxide (Nd2O3) at decomposition of
neodymium carbonate. It was shown in [6] that at
temperatures of ~ 800 and ~ 1100 K, under atmospheric
conditions, neodymium carbonate is converted to
neodymium oxide (Nd2O3) with the release of carbon
dioxide and an intermediate product of oxycarbonate.
The process is described by the following chemical
reactions:
Nd2(CO3)3 Nd2O2CO3 + 2CO2, (~ 800 К),
Nd2O2CO3 Nd2O3+ CO2, (~ 1100 K).
Figs. 4 and 5 show the result of chemical reactions
with sulfur and carbon traces in the BaSO4 and
Nd2(CO3) samples, respectively, after laser irradiation
during 30 s.
Fig. 4. BaSO4 sample after laser irradiation
To study the possibility of separating a component
from a mixture of oxides by difference in vapor pressure
during thermal desorption the B2O3/ZrO2 mixture was
used (Fig. 6). The vaporized substance after heating by
laser irradiation for 30 s (at a given power density of
300400 W/cm
2
, which corresponds to the thermal
radiation from the surface at the temperature of
~ 2800 K (see Fig. 1)) was deposited on a copper
substrate for subsequent film diagnostics.
https://translate.google.com/translate?hl=ru&prev=_t&sl=ru&tl=en&u=https://mash-xxl.info/page/014108127133010162033191159197060169161102255179/)%255d%2520
ISSN 1562-6016. ВАНТ. 2020. №1(125) 193
Fig. 5. Nd2(CO3)3 sample after laser irradiation
To determine the phase composition of the film an
X-ray diffraction analysis was performed (Table 2). The
complexity of the analysis was the formation of a film
with an insufficient thickness of 13 m. The presence
of lines corresponding to the zirconium oxide were not
found in this analysis. This may indicate a lack of
sensitivity of the method at a small amount
of evaporated substance. However, the traces of triclinic
modification of orthoboric acid (boron in combination
with oxygen and hydrogen (Fig. 7)) were found, that,
apparently, was the result of the interaction of boron
with atmospheric components.
a
b
Fig. 6. Photo of a copper substrate:
copper substrate (a), copper substrate after laser
influence on B2O3/ZrO2 mixture (b)
Fig. 7. Diffraction pattern of the copper substrate after
laser influence on B2O3/ZrO2 mixture
Table 2
The results of the X-ray diffraction analysis
Phase Lattice parameters, Å
H3BO3-tr
a = 7.04; b = 7.05;
c = 6.58;
α = 92.60°; β = 101.17°;
γ = 119.83°
Cu a = 3.615
Additionally, an energy dispersive X-ray (EDX)
microanalysis of the deposited film (Figs. 8, 9 and
Table 3) shows the presence of boron oxide polycrystals
with a maximum particle size of ~ 5 μm.
Fig. 8. Results of EDX analysis of a mixture
of B2O3/ZrO2 at various scales
Thus, separation of B2O3 component from the
B2O3/ZrO2 mixture under laser effect with specific
power range of 300400 W/cm
2
(or 1015% of Wmax)
during thermal desorption process due to difference of
physical-chemical properties was performed.
194 ISSN 1562-6016. ВАНТ. 2020. №1(125)
Fig. 9. Photo of boron oxide polycrystals
Table 3
Results of EDX analysis. Spectrum 1
Element wt. % at. %
B 36.63 46.10
O 63.37 53.90
SUMMARY
● The use of a stationary-power CO2 laser for
heating and thermal desorption of B2O3/ZrO2 mixture
with subsequent deposition of the film on a substrate is
considered. X-ray diffraction analysis of the film
deposited on the substrate does not show the presence of
lines corresponding to the lines of zirconium oxide.
EDX analysis of the film deposited on the substrate
show the formation of polycrystals of boron oxide with
sizes of 15 μm.
● Preliminary experiments with a mixture of oxides
showed that under laser irradiation of a given power it is
possible to remove the target components from oxide
mixture (to clean up mixture from the impurities) during
thermal desorption process due to vapor pressure
difference.
● An analysis of the results indicates that it is
necessary to take into account the influence of
atmospheric conditions and the interaction of the
working substance with air components under laser
effect.
Special thanks for providing equipment and
assistance in the experiments to team of co-authors of
research laboratory (armored weapons and military
equipment) of the Faculty of Military Training of the
National Technical University “Kharkiv Polytechnic
Institute” in person V.D. Timofeev and O.G. Bobrov.
REFERENCES
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фель, А.Г. Бобров. Развитие концепции много-
стадийной очистки отработавшего ядерного топлива
от продуктов деления физическими методами //
ВАНТ. Серия «Вакуум, чистые материалы,
сверхпроводники». 2018, №1(113), с. 118-126.
2. V.B. Yuferov, V.V. Katrechko, A.S. Svichkar,
S.V. Shariy, T.I. Tkachova, E.V. Mufel, V.О. Ilichova,
А.Yu. Pakhomov. Problems of impuruties deducing
from multicomponent media at thermal heating,
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общ. ред. В.П. Вейко. СПб: НИУ ИТМО, 2014, с. 50.
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Статья поступила в редакцию 18.11.2019 г.
ИССЛЕДОВАНИЕ ТЕРМОДЕСОРБЦИИ ОКСИДНЫХ СМЕСЕЙ
ПРИ ЛАЗЕРНОМ ВОЗДЕЙСТВИИ
В.В. Катречко, Д.В. Винников, В.Б. Юферов, В.О. Ильичева, А.С. Свичкарь, И.В. Буравилов,
В.Д. Тимофеев, А.Г. Бобров
Для изучения физико-химических процессов, происходящих на стадии нагрева магнитоплазменной
переработки отработавшего ядерного топлива (ОЯТ), проводится исследование термодесорбции оксидов и
оксидных смесей – имитаторов ОЯТ при воздействии стационарного лазерного излучения. Проведены
предварительные эксперименты, выполнены рентгенодифракционный и энергодисперсионный рентгеновский
микроанализы пленки, осажденной на подложку при лазерном воздействии на смесь оксидов B2O3/ZrO2.
ДОСЛІДЖЕННЯ ТЕРМОДЕСОРБЦІЇ ОКСИДНИХ СУМІШЕЙ
ПРИ ЛАЗЕРНОМУ ВПЛИВІ
В.В. Катречко, Д.В. Вінніков, В.Б. Юферов, В.О. Ільічова, О.С. Свічкар, І.В. Буравілов,
В.Д. Тимофєєв, О.Г. Бобров
Для вивчення фізико-хімічних процесів, що відбуваються на стадії нагріву магнітоплазмової переробки
відпрацьованого ядерного палива (ВЯП), проводиться дослідження процесів термодесорбції оксидів і оксидних
сумішей імітаторів ВЯП при впливі стаціонарного лазерного випромінювання. Проведено попередні
експерименти, виконані рентгенодифракційний і енергодисперсійний рентгенівський мікроаналізи плівки,
осадженої на підкладку після лазерного впливу на суміш оксидів B2O3/ZrO2.
Spectrum 1
10 m
ACKNOWLEDGEMENTS
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