TY - JOUR
T1 - Structural and luminescent properties of europium-doped and undoped hydroxyapatite powders sintered by spark plasma
AU - García Domínguez, G.
AU - Garrido Hernández, A.
AU - Cerón Montes, G.
AU - Morales Ramírez, A. J.
AU - de la Torre, S. Díaz
N1 - Publisher Copyright:
© 2019 University of Chemistry and Technology. All rights reserved.
PY - 2019
Y1 - 2019
N2 - This paper studies the structural and photoluminescent properties of hydroxyapatite (HA) and europium-doped hydroxyapatite (HA:Eu) synthesised by the hydrothermal method and sintered by the spark plasma sintering (SPS) technique. HA and HA:Eu powders, synthesised at pH of 10, 11 and 12, were characterised by means of infrared spectroscopy, X-ray diffraction, scanning electron microscopy, Raman spectroscopy and luminescence spectroscopy. The HA and HA:Eu samples were sintered using the SPS technique at 900 and 1200 °C. It was determined that the HA and HA:Eu powders crystallised in the hexagonal phase, which is stable until 900 °C. The presence of Eu3+ ions tended to stabilise the hexagonal phase of hydroxyapatite at 1200 °C. Undoped hydroxyapatite sintered at 1200 °C revealed a significant amount of tricalcium phosphate (β-TCP) as a result of its decomposition. By increasing the heat treatment temperature, different emission lines (5D0→7F0 5D0→7F1 and 5D0→7F2 transitions) were obtained due to calcium site substitution by the europium ions in the HA structure.
AB - This paper studies the structural and photoluminescent properties of hydroxyapatite (HA) and europium-doped hydroxyapatite (HA:Eu) synthesised by the hydrothermal method and sintered by the spark plasma sintering (SPS) technique. HA and HA:Eu powders, synthesised at pH of 10, 11 and 12, were characterised by means of infrared spectroscopy, X-ray diffraction, scanning electron microscopy, Raman spectroscopy and luminescence spectroscopy. The HA and HA:Eu samples were sintered using the SPS technique at 900 and 1200 °C. It was determined that the HA and HA:Eu powders crystallised in the hexagonal phase, which is stable until 900 °C. The presence of Eu3+ ions tended to stabilise the hexagonal phase of hydroxyapatite at 1200 °C. Undoped hydroxyapatite sintered at 1200 °C revealed a significant amount of tricalcium phosphate (β-TCP) as a result of its decomposition. By increasing the heat treatment temperature, different emission lines (5D0→7F0 5D0→7F1 and 5D0→7F2 transitions) were obtained due to calcium site substitution by the europium ions in the HA structure.
KW - Ceramics
KW - Luminescence
KW - SPS
UR - http://www.scopus.com/inward/record.url?scp=85064835502&partnerID=8YFLogxK
U2 - 10.13168/cs.2019.0002
DO - 10.13168/cs.2019.0002
M3 - Artículo
AN - SCOPUS:85064835502
SN - 0862-5468
VL - 63
SP - 100
EP - 109
JO - Ceramics - Silikaty
JF - Ceramics - Silikaty
IS - 1
ER -