Stable garnets in the Er2O3–Sc2O3–Al2O3 oxide system for optical ceramics application

Fabrication and optical properties of garnet ceramics based on Y3−xScxAl5O12 doped with ytterbium and erbium

“…Studies of the effect of sintering temperature (T s ) on the microstructure and stability of the YSAG:Yb,Er phase composition did not reveal fundamental differences from the previously studied ErSAG 32,35 and YSAG:Er 32,35 as well as YSAG:Yb 45 solid solutions. YSAG:Yb,Er ceramics during vacuum sintering behave in the same way as ErSAG and YSAG:Er ceramics.…”

“…The oxide mixture of the sample (AP-1) corresponds to the region of composition stability with congruent melting and is suitable for single crystal growth. Compositions AP-2 and AP-3 are located in the region of unstable scandium-containing solid solutions with a garnet structure, 34,35 which are characterized by incongruent melting. Despite this, it is possible to obtain ceramics of high optical quality for these compositions.…”

Оптические и лазерные характеристики Yb:YSAG-керамики

“…В качестве исходных реагентов использовались гидроксид аммония (25%, extra pure, Sigma Tech), AlCl [13]. Ион скандия может занимать как додекаэдрическую, так и октаэдрическую позиции кристаллической решетки граната в связи с близостью радиусов катионов иттрия и скандия, скандия и алюминия [14], что подтверждается данными как по выращиванию соответствующих монокристаллов [15,16], так и по получению оптической керамики [17].…”