TY - JOUR
T1 - Preparation, characterization and luminescence properties of porous Si3N4 ceramics with Eu2O3 as sintering additive
AU - Yu, F.
AU - Yang, J.
AU - Delsing, A.C.A.
AU - Hintzen, H.T.J.M.
PY - 2010
Y1 - 2010
N2 - Porous Si3N4 ceramics with photoluminescence properties were prepared by pressureless sintering using a-Si3N4 powder as raw material and Eu2O3 as sintering additive. Chemical composition, phase formation, microstructure and photoluminescence properties of porous Si3N4 ceramics were studied by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence measurements (PL/PLE). The results show that single Eu2O3 additive promotes a¿ß transformation but not significant densification. A broad band emission center at 570 nm assigned to Eu2+ is observed, Eu3+ in Eu2O3 is (partially) converted to Eu2+ by reaction with Si3N4, which results in a lower ß aspect ratio and ß-content compared to the other Ln (Ln=lanthanide) oxide additives.
AB - Porous Si3N4 ceramics with photoluminescence properties were prepared by pressureless sintering using a-Si3N4 powder as raw material and Eu2O3 as sintering additive. Chemical composition, phase formation, microstructure and photoluminescence properties of porous Si3N4 ceramics were studied by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence measurements (PL/PLE). The results show that single Eu2O3 additive promotes a¿ß transformation but not significant densification. A broad band emission center at 570 nm assigned to Eu2+ is observed, Eu3+ in Eu2O3 is (partially) converted to Eu2+ by reaction with Si3N4, which results in a lower ß aspect ratio and ß-content compared to the other Ln (Ln=lanthanide) oxide additives.
U2 - 10.1016/j.jlumin.2010.07.008
DO - 10.1016/j.jlumin.2010.07.008
M3 - Article
SN - 0022-2313
VL - 130
SP - 2298
EP - 2304
JO - Journal of Luminescence
JF - Journal of Luminescence
IS - 12
ER -