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Information × Registration Number 0222U003165, 0120U101755 , R & D reports Title Development of the next generation of YAG:Nd laser ceramics for powerful special purpose laser sources popup.stage_title Head Tolmachov Oleksandr V., Доктор фізико-математичних наукYavetskiy Roman P., Доктор технічних наук Registration Date 19-02-2022 Organization Institute of Single Crystals of the National Academy of Sciences of Ukraine popup.description2 The obtaining conditions of Y2O3-Al2O3-Nd2O3 nanopowders by the co-precipitation method were optimized. The powder calcined at 1250°C in air for 4 h, was the most suitable for the production of transparent Nd:YAG ceramics. The conditions of homogenization by high-energy milling of starting micro-dimensional Y2O3-Al2O3-Nd2O3 commercial powders are optimized. The effect of solid loading content (φ) during milling on the properties of powder mixtures and the microstructure and optical properties of Nd:YAG ceramics was studied. It is shown that the slurry filling (φ=0.19-0.22), at which the distance between particles corresponds to the value of D50, is optimal for the ceramic process. 1at.%Nd:YAG transparent ceramics (22×3×4 mm3) with optical losses of 1×10-3cm-1 were obtained by solid-state reactive sintering from optimized powders. The influence of MgO and MgO+SiO2 sintering aids on the synthesis of YAG optical ceramics has been studied. The best result in terms of optical quality (82.5% transmission) was achieved in YAG ceramics doped with 0.071 at.% Si4+ and 0.044 at.% Mg2+ ions. Peculiarities of solid-state reactive sintering of ceramics with complex architecture using YAG/Yb:YAG model system are established. Transparent composite ceramics of coaxial form were obtained, their microstructure, optical properties and laser characteristics were studied. Laser generation with differential efficiency of 30% at the wavelength of 1030 nm was obtained using YAG/15at.%Yb:YAG ceramics with optical transmission of ~80%. The method of diffusion bonding to obtain composite ceramics has been adapted. The structural and optical properties of composite ceramics have been studied. The obtained three-layer ceramic element 5at.%Sm:YAG/1at.%Nd:YAG/5at.%Sm:YAG is characterized by high optical quality (transmittance at 80%). Product Description popup.authors Balabanov Anton E. Bovda Vira O. Vorona Ihor О. Dobrotvorska Mariya V. Doroshenko Andriy G Kryzhanovska Oleksandra S Lytvynov Leonid A. Lyubitska Tamara B Matvievska Neonila A. Matvienko Oksana O. Mateichenko Pavlo V. Parkhomenko Sergiy V. Pletser Oleh О. Safronova Nadiya А. Tymoshenko Arsenii D. Tolmachov Oleksandr V. Chaika Mykhaylo А. Chernomorets Dariya H Shevela Yuriy V Shulichenko Olena M Yavetskyi Roman P. popup.nrat_date 2022-03-09 Close