Absence of host cation segregation in the (Gd,Y)3Al 5O12 mixed garnet optical ceramics

Georges Boulon; Thierry Epicier; Wei Zhao; Valery I. Chani; Takayuki Yanagida; Akira Yoshikawa

doi:10.1143/JJAP.50.090207

Absence of host cation segregation in the (Gd,Y)₃Al ₅O₁₂ mixed garnet optical ceramics

Georges Boulon, Thierry Epicier, Wei Zhao, Valery I. Chani, Takayuki Yanagida, Akira Yoshikawa

Materials Property Division

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

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.

Original language	English
Article number	090207
Journal	Japanese journal of applied physics
Volume	50
Issue number	9 PART 1
DOIs	https://doi.org/10.1143/JJAP.50.090207
Publication status	Published - 2011 Sep

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "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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AU - Epicier, Thierry

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AU - Chani, Valery I.

AU - Yanagida, Takayuki

AU - Yoshikawa, Akira

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Absence of host cation segregation in the (Gd,Y)₃Al ₅O₁₂ mixed garnet optical ceramics

Abstract

ASJC Scopus subject areas

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