TY - JOUR
T1 - Preparation of luminescent Eu-doped yttria-silicate coupons by spark plasma sintering
T2 - Reduction from Eu3+ to Eu2+
AU - Navarro Villanueva, Merlina A.
AU - Morales Ramirez, Angel de J.
AU - Lopez, Fernando Juarez
N1 - Publisher Copyright:
© 2019
PY - 2019/8
Y1 - 2019/8
N2 - Spark plasma sintering technique was used to densify both Eu-doped and Un-doped yttria silicate powders at temperatures in the range between 1300 and 1400 °C. Shrinkage behavior was investigated for sintering powders into a full-consolidated matrix for both undoped and doped Eu+3 yttria silicates powder. Maximum shrinkage rate at sintering temperature of 1000 °C was determined when Eu content is present. Sintering process induced phase transition from X1 to X2 in both undoped and Eu-doped powder. On yttrium silicate powders, only has been observed the typical reddish emission of Eu3+ ions (centered at 612 nm), however, after the SPS process, the Eu3+ has been reduced to Eu2+, showing the typical bluish emission, at 404 and 445 nm, corresponding to the two different atomic positions of Eu2+ at the X2 phase.
AB - Spark plasma sintering technique was used to densify both Eu-doped and Un-doped yttria silicate powders at temperatures in the range between 1300 and 1400 °C. Shrinkage behavior was investigated for sintering powders into a full-consolidated matrix for both undoped and doped Eu+3 yttria silicates powder. Maximum shrinkage rate at sintering temperature of 1000 °C was determined when Eu content is present. Sintering process induced phase transition from X1 to X2 in both undoped and Eu-doped powder. On yttrium silicate powders, only has been observed the typical reddish emission of Eu3+ ions (centered at 612 nm), however, after the SPS process, the Eu3+ has been reduced to Eu2+, showing the typical bluish emission, at 404 and 445 nm, corresponding to the two different atomic positions of Eu2+ at the X2 phase.
KW - Eu blue emission
KW - Eu to Eu reduction
KW - Luminescence
KW - Sintering
KW - Yttria-silicate
UR - http://www.scopus.com/inward/record.url?scp=85064534531&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2019.04.026
DO - 10.1016/j.jlumin.2019.04.026
M3 - Artículo
AN - SCOPUS:85064534531
SN - 0022-2313
VL - 212
SP - 106
EP - 115
JO - Journal of Luminescence
JF - Journal of Luminescence
ER -