T Kissel, J Brübach, M Euler, et al. – Materials Chemistry and Physics, 2013
With regard to phosphor thermometry, the materials Y3Al5O12:Eu (YAG:Eu) and YAlO3:Eu (YAP:Eu) were synthesised and characterised in order to substitute the commonly used thermographic phosphor Y2O3:Eu, whose temperature sensitive luminescence lifetime exhibits a strong and most often undesirable cross-sensitivity to the oxygen concentration of the surrounding gas phase. The synthesis is outlined in detail and the crystallographic structure was characterised by X-ray diffraction. In a second step, the luminescence properties following pulsed UV laser excitation were determined. In this context, the emission spectra and the temperature lifetime characteristics were monitored. For Y3Al5O12:Eu and YAlO3:Eu, temperature sensitive ranges of 1000 K–1470 K and 850 K–1300 K were identified. Contrary to Y2O3:Eu, both materials do show much lower cross-sensitivities to the oxygen concentration of the surrounding gas phase…[22] and [23]. The luminescence spectra were monitored by a fibre-coupled StellarNet STE-EPP2000-C spectrometer within a spectral range between 200 nm and 850 nm (grating: 600 lines mm −1 , slit width: 50 μm, max. resolution.
Ø Fig. 1. Crystal structure of Y3Al5O12, showing one layer of the three-dimensional network of tilted AlO6octahedra and AlO4 tetrahedra as well as one YO8dodecahedron.
