Production of nanopowders of oxides by means of fiber and pulse‐periodical CO2 lasers. Issue 6 (2nd May 2013)

• Record Type: Journal Article
• Authors: Osipov, V. V.; Platonov, V. V.; Lisenkov, V. V.; Podkin, A. V.; Zakharova, E. E.; Palashov, Oleg V.; Khazanov, Efim A.; Kravchenko, Valery B.; Fedorov, Pavel P.
• Is Part Of: Physica status solidi. Volume 10:Issue 6(2013:Jun.)
• Page Start: 926
• Page End: 932
• Publication Date: 2013-05-02
• Subjects: Solid state physics -- Congresses; Solid state physics -- Periodicals; Solid state physics; Conference proceedings; Periodicals; 530.41
• DOI: 10.1002/pssc.201200965
• Languages: English
• ISSNs: 1862-6351

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The results of investigation of YSZ, Nd:Y<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub> 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 CO<sub>2</sub> 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 CO<sub>2</sub> laser in atmospheric pressure air had close average sizes (10÷16 nm). The productivity of nanopowder synthesis by CO<sub>2</sub> laser from YSZ 1%Nd:Y<sub>2</sub>O<sub>3</sub>, 1%Nd:Y<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>, and CeGdO was 23 g/hour, 29 g/hour, 24 g/hour and 80 g/hour, respectively. Unlike CO<sub>2</sub> laser the deep melting mode is realized during evaporation of 1%Nd:Y<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub> 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 CO<sub>2</sub> 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:Y<sub>2</sub>O<sub>3</sub> nanopowder with specific surface of 70 m<sup>2</sup>/g and productivity of 23 g/hour at air pressure 70 kPa. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</p> </abstract>