Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1463474 | Ceramics International | 2013 | 5 Pages |
Abstract
Transparent lutetium niobate (Lu3NbO7) bodies were prepared by reactive spark plasma sintering using Lu2O3 and Nb2O5 powders. Fully dense Lu3NbO7 bodies with density greater than 99.5% of the theoretical were obtained at 1300–1650 °C. The grains steadily grew from 0.1 to 0.6 μm with increasing sintering temperature from 1200 to 1450 °C and significant grain growth from 2.2 to 9.2 μm occurred at 1550–1650 °C. The Lu3NbO7 body sintered at 1450 °C showed the highest transmittance of 63% at 550 nm after heat treatment at 850 °C in air for 6 h. Fully dense, submicron-size transparent Lu3NbO7 exhibited Vickers hardness of ∼13.0 GPa and indentation fracture toughness of 1.0 MPa m1/2.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Liqiong An, Akihiko Ito, Takashi Goto,