Effect of the sintering temperature on the microstructure and optical properties of YAG:Cr,Mg ceramics

被引：9

作者：

Doroshenko, A. G. ^{[1
]}

Yavetskiy, R. P. ^{[1
]}

Parkhomenko, S. V. ^{[1
]}

Vorona, I. O. ^{[1
]}

Kryzhanovska, O. S. ^{[1
]}

Mateychenko, P. V. ^{[1
]}

Tolmachev, A. V. ^{[1
]}

Vovk, E. A. ^{[1
]}

Bovda, V. A. ^{[1
,2
]}

Croitoru, G. ^{[3
]}

Gheorghe, L. ^{[3
]}

机构：

[1] Natl Acad Sci Ukraine, Inst Single Crystals, 60 Nauky Ave, UA-61072 Kharkov, Ukraine

[2] Natl Sci Ctr Kharkiv Inst Phys & Technol, 1 Akad Skaya Str, UA-61108 Kharkov, Ukraine

[3] Natl Inst Laser Plasma & Radiat Phys, Lab Solid State Quantum Elect, 409 Atomistilor Str, Magurele 077125, Ilfov, Romania

来源：

OPTICAL MATERIALS | 2019年 / 98卷

关键词：

YAG:Cr ceramics; Vacuum sintering; Optical losses; Valence transformation; Q-switching operation; CONVERSION EFFICIENCY; TRANSPARENT CERAMICS; RESIDUAL POROSITY; YAG CERAMICS; CR4+ IONS; FABRICATION; ADDITIVES; STATE; CA; DENSIFICATION;

D O I：

10.1016/j.optmat.2019.109505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

YAG:Cr, Mg optical ceramics were prepared by the solid-state reactive sintering method within the temperature range of 1750-1800 degrees C. The influence of the sintering temperature on the microstructure, phase composition, and optical properties of YAG:Cr, Mg ceramics was studied. It has been shown that optimal obtaining temperature of YAG:Cr, Mg ceramics doped with 0.5 at.% of chromium ions and 0.5 at.% of magnesium ions is 1765 degrees C. YAG:Cr, Mg ceramics sintered at T=1765 degrees C possess the lowest porosity and optical losses in the visible wavelength range. They are characterized by the average grain size of about 3 pm and in-line transmittance above 80%. Thermal annealing of ceramics results in transition of a part of Cr3+ ions to Cr4+ charge state. A decrease in concentration of Cr4+ ions in tetrahedral coordination with increase the sintering temperature has been observed. This effect was attributed to different charge compensation mechanisms of Mg2+ ions taking place in YAG:Cr, Mg ceramics obtained at various temperatures. Finally, laser performance of YAG:Cr, Mg ceramics was estimated in the passive Q-switch mode.

引用

页数：7

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