Predicting Phase Stability of Materials
Based on (Sc 1–x Ln x )[(SiO 4 ) 0.5 O 0.5 ], Ln =
Tb – Lu and Y Solid Solutions
E. I. Get’man and S. V. Radio
1 Introduction
Solid solutions based on scandium oxyorthosilicate, Sc 2 SiO 5, are promising materials for creating new efficient lasers for medicine, laser location [1], military equipment, telecommunications, metal cutting [2], environmental monitoring [3–5], and
other purposes. They serve as matrices (host materials), while the triple-charged
Ln
3+ ions, which are contained in small amounts (up to 5 at.%), act as activators
(dopants). In addition to oxyorthosilicates containing only scandium cations in their
matrices [6, 7], we also studied materials based on “mixed” oxyorthosilicates with
two different cations—scandium and rare-earth elements (REEs), which represent
solid solutions of Sc 2 SiO 5 –Ln 2 SiO 5 systems [8–11]. The use of “mixed” scandium
and REE oxyorthosilicates is stipulated by the desire to obtain materials with better
properties compared to Ln 2 SiO 5 , and which are less expensive compared to Sc 2 SiO 5
since the cost of scandium is higher than one of REE.
No research of physical and chemical fundamentals for the synthesis of solid solutions—state diagrams and, in particular, solubility regions based on the components
of the Sc 2 SiO 5 and Ln 2 SiO 5 systems—has been carried out, while this knowledge is
necessary for choosing the composition of materials. As far as we know, only information about the Lu 2–x Sc x SiO 5 [12] and Er x Sc 2–x SiO 5 [13] systems are available.
In [12], it was reported that three compositions of polycrystalline solid solutions
with x = 0.5, 0.8, 1.0 at a temperature of 1670 K were obtained, while in [13],
the synthesis of Er x Sc 2–x SiO 5 solid solutions in the form of multinanolayer films
within the temperature range 1173–1373 K was studied. In [13], it was also reported
that Er x Sc 2–x SiO 5 films can be used to create a light source with high optical gain
since they have a higher Er concentration compared to Si-based materials doped
E. I. Get’man · S. V. Radio (B)
Vasyl’ Stus Donetsk National University, Vinnytsia, Ukraine
e-mail: radio@donnu.edu.ua
© Springer Nature Switzerland AG 2021
O. Fesenko and L. Yatsenko (eds.), Nanomaterials and Nanocomposites,
Nanostructure Surfaces, and Their Applications, Springer Proceedings
in Physics 246, https://doi.org/10.1007/978-3-030-51905-6_39
569
Based on (Sc 1–x Ln x )[(SiO 4 ) 0.5 O 0.5 ], Ln =
Tb – Lu and Y Solid Solutions
E. I. Get’man and S. V. Radio
1 Introduction
Solid solutions based on scandium oxyorthosilicate, Sc 2 SiO 5, are promising materials for creating new efficient lasers for medicine, laser location [1], military equipment, telecommunications, metal cutting [2], environmental monitoring [3–5], and
other purposes. They serve as matrices (host materials), while the triple-charged
Ln
3+ ions, which are contained in small amounts (up to 5 at.%), act as activators
(dopants). In addition to oxyorthosilicates containing only scandium cations in their
matrices [6, 7], we also studied materials based on “mixed” oxyorthosilicates with
two different cations—scandium and rare-earth elements (REEs), which represent
solid solutions of Sc 2 SiO 5 –Ln 2 SiO 5 systems [8–11]. The use of “mixed” scandium
and REE oxyorthosilicates is stipulated by the desire to obtain materials with better
properties compared to Ln 2 SiO 5 , and which are less expensive compared to Sc 2 SiO 5
since the cost of scandium is higher than one of REE.
No research of physical and chemical fundamentals for the synthesis of solid solutions—state diagrams and, in particular, solubility regions based on the components
of the Sc 2 SiO 5 and Ln 2 SiO 5 systems—has been carried out, while this knowledge is
necessary for choosing the composition of materials. As far as we know, only information about the Lu 2–x Sc x SiO 5 [12] and Er x Sc 2–x SiO 5 [13] systems are available.
In [12], it was reported that three compositions of polycrystalline solid solutions
with x = 0.5, 0.8, 1.0 at a temperature of 1670 K were obtained, while in [13],
the synthesis of Er x Sc 2–x SiO 5 solid solutions in the form of multinanolayer films
within the temperature range 1173–1373 K was studied. In [13], it was also reported
that Er x Sc 2–x SiO 5 films can be used to create a light source with high optical gain
since they have a higher Er concentration compared to Si-based materials doped
E. I. Get’man · S. V. Radio (B)
Vasyl’ Stus Donetsk National University, Vinnytsia, Ukraine
e-mail: radio@donnu.edu.ua
© Springer Nature Switzerland AG 2021
O. Fesenko and L. Yatsenko (eds.), Nanomaterials and Nanocomposites,
Nanostructure Surfaces, and Their Applications, Springer Proceedings
in Physics 246, https://doi.org/10.1007/978-3-030-51905-6_39
569