The scandium impact on the sintering of YSAG:Yb ceramics with high optical transmittance. Issue 2 (15th January 2021)

• Record Type: Journal Article
• Authors: Nikova, M.S.; Tarala, V.A.; Malyavin, F.F.; Vakalov, D.S.; Lapin, V.A.; Kuleshov, D.S.; Kravtsov, A.A.; Chikulina, I.S.; Tarala, L.V.; Evtushenko, E.A.; Medyanik, E.V.; Krandievsky, S.O.; Bogach, A.V.; Kuznetsov, S.V.
• Is Part Of: Ceramics international. Volume 47:Issue 2(2021)
• Page Start: 1772
• Page End: 1784
• Publication Date: 2021-01-15
• Subjects: Garnet -- Optical ceramics -- YSAG:Yb -- Vacuum sintering -- Scandium; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.003
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Optical ceramics based on Yb 2 O 3 –Y 2 O 3 -Sc 2 O 3 –Al 2 O 3 solid solutions with a garnet structure were obtained using chemical precipitation and vacuum sintering techniques. In the samples' composition, scandium was incorporated into both dodecahedral and octahedral garnet sites in ratios from 4 : 1 to 1 : 4. The differential thermal analysis and dilatometry methods were used to study the phase transformations kinetics of the precursor powders and the vacuum sintering kinetics of YSAG:Yb compacts. It was found that the garnet cationic composition has a strong effect on the optical ceramics' sintering temperature ranges. It was also pointed out that an increase in the scandium content in the dodecahedral YSAG:Yb garnet site was accompanied by a decrease in the vacuum sintering temperature, which ensures maximum compaction rate. For the samples with the Y 2.15 Yb 0.25 Sc 1.00 Al 4.6 O 12, Y 2.35 Yb 0.25 Sc 1.00 Al 4.4 O 12, Y 2.55 Yb 0.25 Sc 1.00 Al 4.2 O 12, Y 2.52 Yb 0.25 Sc 0.38 Al 4.85 O 12 compositions, optical transmission in visible and near-infrared range of more than 80% was achieved.