Microstructure evolution during reactive sintering of Y3Al5O12:Nd3+ transparent ceramics: Influence of green body annealing. Issue 13 (October 2019)

• Record Type: Journal Article
• Authors: Yavetskiy, R.P.; Doroshenko, A.G.; Parkhomenko, S.V.; Vorona, I.O.; Tolmachev, A.V.; Kosyanov, D.Yu.; Vornovskikh, A.A.; Zakharenko, A.M.; Mayorov, V.Yu.; Gheorghe, L.; Croitoru, G.; Pavel, N.; Multian, V.V.; Gayvoronsky, V.Ya.
• Is Part Of: Journal of the European Ceramic Society. Volume 39:Issue 13(2019)
• Page Start: 3867
• Page End: 3875
• Publication Date: 2019-10
• Subjects: Reactive sintering -- Microstructure -- Porosity -- Optical properties -- Laser performance; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2019.05.013
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The effect of green bodies' mesostructure on the porosity, optical properties and laser performance of reactive sintered Y3 Al5 O12 :Nd 3+ transparent ceramics was studied. Only minor changes in microstructure were revealed for green bodies without annealing and those annealed at 600, 800, 1000 °C, while average pore size increases to 140 nm for sample annealed at 1200 °C. Y3 Al5 O12 :Nd 3+ ceramics sintered at 1750 °C for 10 hours possess significant differences in the final porosity, optical and laser characteristics. Despite all green bodies exhibit a similar phase evolution and sintering behavior on heating, the differences appear in the final stage, when the latest percentage of porosity is removed. The green bodies annealed at 600 °C have an optimal mesostructure from the standpoint of uniform densification. Y3 Al5 O12 :Nd 3+ ceramics prepared using these green bodies exhibit porosity ≤0.001 vol% and yield efficient laser emission at 1.06 μm with slope efficiency as high as 67% in quasi-continuous pumping at 807 nm.