Microstructure evolution of SiO2, ZrO2-doped Y3Al5O12:Nd3+ ceramics obtained by reactive sintering

Microstructure evolution of SiO2, ZrO2-doped Y3Al5O12:Nd3+ ceramics obtained by reactive sintering

The evolution of microstructure, porosity and optical properties of SiO2, ZrO2-doped Y3Al5O12:Nd3+ laser ceramics obtained by reactive sintering have been studied. The relationship between the relative density and average grain size of garnet ceramics obtained in the 1500–1800°С temperature range ha...

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Bibliographic Details
Published in:Ceramics international Vol. 41; no. 9; pp. 11966 - 11974
Main Authors: Yavetskiy, R.P., Kosyanov, D.Yu, Doroshenko, A.G., Parkhomenko, S.V., Mateychenko, P.V., Vorona, I.O., Tolmachev, A.V., Lopin, A.V., Baumer, V.N., Voznyy, V.L.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-11-2015
Subjects:
A. Sintering
B. Grain size
B. Porosity
C. Optical properties
Ceramics
E. Functional applications
Grain boundaries
Laser sintering
Microstructure
Porosity
Reactive sintering
Sintering (powder metallurgy)
Zirconium dioxide
E. Functional applications
B. Porosity
B. Grain size
A. Sintering
C. Optical properties
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Summary:The evolution of microstructure, porosity and optical properties of SiO2, ZrO2-doped Y3Al5O12:Nd3+ laser ceramics obtained by reactive sintering have been studied. The relationship between the relative density and average grain size of garnet ceramics obtained in the 1500–1800°С temperature range has been determined. It has been shown that anomalous behavior of sintering trajectory at Т>1700°С may be due to the inhibition of ceramic grain boundaries mobility by Zr4+ ions. At the sintering temperature of 1800°С a partial decomposition of Y3Al5O12:Nd3+, Si4+, Zr4+ solid solution occurs with precipitation of alumina along grain boundaries of ceramics. The relationships between the residual porosity, in-line optical transmittance and sintering conditions of Y3Al5O12:Nd3+ (4at%) ceramics have been studied. Optical ceramics sintered at T=1750°C for 12h possess residual porosity of 0.0016vol%, in-line optical transmittance of 82.9% at 1064nm wavelength and laser slope efficiency of 33% under diode-pumping at 808nm.
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content type line 23
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.06.009