Laser synthesis of nanopowders

Осипов, В. В.; Kotov, Yu. A.; Иванов, М. Г.; Саматов, О. М.; Lisenkov, V. V.; Платонов, В. В.; Мурзакаев, А. М.; Medvedev, A. I.; Azarkevich, E. I.

doi:10.1134/s1054660x06010105

Cited by 114 publications

(38 citation statements)

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“…The evaporation of the targets made of refractory oxides with the aid of a pulsed CO 2 laser is experimen tally and theoretically studied in [6][7][8]. Note that the interaction of the radiation of an ytterbium fiber laser with such targets needs to be additionally studied.…”

Section: Results Of Calculationsmentioning

confidence: 99%

Interaction of the radiation of the high-power ytterbium-fiber laser with inhomogeneous dielectric targets

2013

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Section: Results Of Calculationsmentioning

confidence: 99%

Interaction of the radiation of the high-power ytterbium-fiber laser with inhomogeneous dielectric targets

2013

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“…Parameters of received by nanopowders are shown in Table 2. Some of these results were published in [1]. The analysis of the received powders obtained with the help of both lasers has shown that they were poorly agglomerated and consisted of two fractions sharply distinguished on the sizes.…”

Section: Contributedmentioning

confidence: 89%

Production of nanopowders of oxides by means of fiber and pulse‐periodical CO₂ lasers

Осипов

Платонов

Lisenkov

et al. 2013

Phys. Status Solidi C

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The results of investigation of YSZ, Nd:Y2O3, Al2O3 nanopowder production by laser evaporation of oxide targets in a gas current are reported in present paper. For this purpose we used the pulse‐periodical CO2 laser and the continuous fiber ytterbium laser with 550 W and 600 W radiation mean power accordingly. The powders obtained by these lasers, consisted of weakly agglomerated spherical nanopartices (≥ 99 wt%), and ≤ 1 wt% of micron sized particles (drops and target fragments). Nanoparticles from various oxides produced by CO2 laser in atmospheric pressure air had close average sizes (10÷16 nm). The productivity of nanopowder synthesis by CO2 laser from YSZ 1%Nd:Y2O3, 1%Nd:Y2O3, Al2O3, and CeGdO was 23 g/hour, 29 g/hour, 24 g/hour and 80 g/hour, respectively. Unlike CO2 laser the deep melting mode is realized during evaporation of 1%Nd:Y2O3 and Al2O3 targets by fiber laser. The crater depth increases up to 300–1000 μm in this mode. As a result, the target surface became very irregular and productivity of nanopowder synthesis was less, than in the case of CO2 laser. To reduce the effect of deep melting the evaporation of a target has been investigated experimentally and theoretically. As a result of our investigations we have obtained 1%Nd:Y2O3 nanopowder with specific surface of 70 m2/g and productivity of 23 g/hour at air pressure 70 kPa. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…The pulse-periodic CO 2 laser LAERT (λ = 10.6 µm) [21] was used to produce nanopowders. The main laser parameters at the synthesis of nanopowders were as follows: average power P = 600-800 W, peak power P p = 10-11 kW, half-height duration τ l = 200 µs, pulse repetition rate f = 500 Hz.…”

Section: Methodsmentioning

confidence: 99%

Ce:YAG transparent ceramics based on nanopowders produced by laser ablation method: Fabrication, optical and scintillation properties

Осипов¹,

Шитов²,

Lukyashin³

et al. 2017

Nanosystems: Phys. Chem. Math.

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Transparent Ce:YAG ceramics were fabricated by the solid-state reaction method with an additional round of pre-calcining using nanopowders of Ce 2x Y 2−2x O 3 (x = 0.001, 0.01, 0.03 and 0.05) and Al 2 O 3 synthesized by laser ablation. Additional pre-calcining of the nanopowder mixture in air was used to partially transform the oxides into the YAG phase before sintering. The transmittance of the obtained 2-mm-thick Ce:YAG ceramics was over 81 % in the wavelength range of 500-900 nm. The average volumes of the scattering centers in the obtained ceramics were evaluated by direct count method to be 34, 74, 53, 50 ppm for 0.1, 1, 3 and 5 % Ce doping concentration, respectively. The absolute light yields, energy resolutions under 662 keV gamma ray, and decay curves of scintillations of the fabricated Ce:YAG samples were measured and compared to those of Ce:YAG and CsI:Tl single crystals.

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Laser synthesis of nanopowders

Cited by 114 publications

References 4 publications

Interaction of the radiation of the high-power ytterbium-fiber laser with inhomogeneous dielectric targets

Interaction of the radiation of the high-power ytterbium-fiber laser with inhomogeneous dielectric targets

Production of nanopowders of oxides by means of fiber and pulse‐periodical CO₂ lasers

Ce:YAG transparent ceramics based on nanopowders produced by laser ablation method: Fabrication, optical and scintillation properties

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Laser synthesis of nanopowders

Cited by 114 publications

References 4 publications

Interaction of the radiation of the high-power ytterbium-fiber laser with inhomogeneous dielectric targets

Interaction of the radiation of the high-power ytterbium-fiber laser with inhomogeneous dielectric targets

Production of nanopowders of oxides by means of fiber and pulse‐periodical CO2 lasers

Ce:YAG transparent ceramics based on nanopowders produced by laser ablation method: Fabrication, optical and scintillation properties

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Production of nanopowders of oxides by means of fiber and pulse‐periodical CO₂ lasers