Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5442574 | Optical Materials | 2017 | 6 Pages |
Abstract
This paper describes the use of a laser sintering technique to produce persistent luminescence SrAl2O4:Eu2+Dy3+ ceramics, doped with boron that exhibit enhanced translucency in the visible/near infrared spectral range. In this technique, a CO2 laser is used as the main heat source for sintering with no atmospheric control. The ceramics, sintered at a power density of 3.1Â W/mm2, yielded a single monoclinic SrAl2O4 phase, a homogeneous grain size distribution, and transmittance of up to 50% over 400Â nm-800Â nm. Even when sintered in air, the ceramics exhibited the characteristic green emission from Eu2+ ions, which corresponds to the 5d â 4f transition at 514Â nm. The method of inserting the boron into the matrix is the key to improving the transparency of ceramics.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Y.G.S. Alves, D.V. Sampaio, N.R.S. Souza, D.C. Silva, T.R. Cunha, C.T. Meneses, E.J.S. Fonseca, R.S. Silva,