Microstructure evolution of SiO2, ZrO2-doped Y3Al5O12:Nd3+ ceramics obtained by reactive sintering. Issue 9 (November 2015)

• Record Type: Journal Article
• 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.
• Is Part Of: Ceramics international. Volume 41:Issue 9(2015)Part B
• Page Start: 11966
• Page End: 11974
• Publication Date: 2015-11
• Subjects: A. Sintering -- B. Grain size -- B. Porosity -- C. Optical properties -- E. Functional applications; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.06.009
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The evolution of microstructure, porosity and optical properties of SiO2, ZrO2 -doped Y3 Al5 O12 :Nd 3+ 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 Zr 4+ ions. At the sintering temperature of 1800 °С a partial decomposition of Y3 Al5 O12 :Nd3 +, Si 4+, Zr 4+ 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 Y3 Al5 O12 :Nd3 + (4 at%) ceramics have been studied. Optical ceramics sintered at T =1750 °C for 12 h possess residual porosity of 0.0016 vol%, in-line optical transmittance of 82.9% at 1064 nm wavelength and laser slope efficiency of 33% under diode-pumping at 808 nm.