TY - JOUR
T1 - Absence of host cation segregation in the (Gd,Y)3Al 5O12 mixed garnet optical ceramics
AU - Boulon, Georges
AU - Epicier, Thierry
AU - Zhao, Wei
AU - Chani, Valery I.
AU - Yanagida, Takayuki
AU - Yoshikawa, Akira
PY - 2011/9
Y1 - 2011/9
N2 - Recently non-uniform distribution of dopants in transparent optical ceramics was observed. It was demonstrated that dopants with low segregation coefficients (K <0:2) with respect to the melt crystal growth are segregated to the grain boundaries when the grains of the ceramics are developed. This communication discusses segregation of host cations that form crystal matrix. Experimental examination of spatial distribution of Gd3+ and Y 3+ host cations in Ce3+-doped (Gd,Y)3Al 5O12 ceramic sample demonstrated that no detectable redistribution of Gd3+ and Y3+ cations in the vicinity of the grain boundaries was detected. These results are in good agreement with comparable segregation behavior of Gd3+ and Y3+ [K(Y 3+) ≈ K(Gd3+)] when the garnet solidification is performed from liquid phase. This observation also confirms qualitative match of segregation in liquid and solid states.
AB - Recently non-uniform distribution of dopants in transparent optical ceramics was observed. It was demonstrated that dopants with low segregation coefficients (K <0:2) with respect to the melt crystal growth are segregated to the grain boundaries when the grains of the ceramics are developed. This communication discusses segregation of host cations that form crystal matrix. Experimental examination of spatial distribution of Gd3+ and Y 3+ host cations in Ce3+-doped (Gd,Y)3Al 5O12 ceramic sample demonstrated that no detectable redistribution of Gd3+ and Y3+ cations in the vicinity of the grain boundaries was detected. These results are in good agreement with comparable segregation behavior of Gd3+ and Y3+ [K(Y 3+) ≈ K(Gd3+)] when the garnet solidification is performed from liquid phase. This observation also confirms qualitative match of segregation in liquid and solid states.
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U2 - 10.1143/JJAP.50.090207
DO - 10.1143/JJAP.50.090207
M3 - Article
AN - SCOPUS:80053037314
VL - 50
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9 PART 1
M1 - 090207
ER -