Nd{sup 3+}:Y{sub 3}Al{sub 5}O{sub 12} laser ceramics: Influence of the size of yttrium oxide particles on sintering

Journal Article · Sun Mar 15 04:00:00 EDT 2015 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774515020121· OSTI ID:22472401

Baumer, V. N.; Yavetskiy, R. P. ^[1]; Voznyy, V. L. ^[2]; Kravchenko, V. B.; Kopylov, Yu. L. ^[3]; Tolmachev, A. V. ^[1]

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1. National Academy of Sciences of Ukraine, Institute for Single Crystals (Ukraine)
2. EDAPS-Lazer Ltd. (Ukraine)
3. Russian Academy of Sciences, Institute of Radio Engineering and Electronics (Fryazino Branch) (Russian Federation)

The influence of the size of Y{sub 2}O{sub 3} powder particles on the structure formation and densification of Nd{sup 3+}:Y{sub 3}Al{sub 5}O{sub 12} laser ceramics has been studied. It is shown that the use of 50- and 100-nm yttrium oxide particles makes it possible to synthesize single-phase yttrium aluminum garnet at temperatures of 1200 and 1500°C, respectively, whereas in the case of 5000-nm yttrium oxide particles 2-h exposure at a temperature of 1500°C yields only 80 wt % of the Nd{sup 3+}:Y{sub 3}Al{sub 5}O{sub 12} phase. Bulk swelling of pressed samples during sintering of 2.94Y{sub 2}O{sub 3}-0.06Nd{sub 2}O{sub 3}-5Al{sub 2}O{sub 3} powders with the size ratio of the initial particles R(Al{sub 2}O{sub 3}/Y{sub 2}O{sub 3}) ∼ 5 is observed. The application of different-sized powders (R ∼ 2.5) provides quantitative ratios between phases in the 3Y{sub 2}O{sub 3}-5Al{sub 2}O{sub 3} system at which shrinkage in a temperature range of 20–1500°C is dominant. Laser ceramics 0–2 at % Nd{sup 3+}:Y{sub 3}Al{sub 5}O{sub 12} have been obtained by the solid-phase sintering of oxide powders (R ∼ 2.5). The slope efficiency for 1 at % Nd{sup 3+}:Y{sub 3}Al{sub 5}O{sub 12} laser ceramics is found to be 33%.

• OSTI ID: 22472401
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 2 Vol. 60; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
ALUMINIUM OXIDES
CERAMICS
EFFICIENCY
GARNETS
LASER MATERIALS
NEODYMIUM IONS
PARTICLES
POWDERS
SINTERING
SOLIDS
SWELLING
TEMPERATURE DEPENDENCE
YTTRIUM OXIDES