Mechanisms of formation of solid solutions and optical spectroscopic properties of transparent ceramic materials based on Y2O3:Yb

• Published in: Russian journal of inorganic chemistry Vol. 58; no. 11; pp. 1335 - 1340
• Main Authors: Tel’nova, G. B., Konovalov, A. A., Dudenkov, I. V., Burkov, V. I., Solntsev, K. A.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.11.2013
• Subjects: Cations; Ceramics; Chemistry; Chemistry and Materials Science; Crystal lattices; Cubic lattice; Inorganic Chemistry; Optical properties; Physical Methods of Investigation; Solid solutions; Spectroscopy; Unit cell; Cationic Sublattice; Yttrium Oxide; Solid Solution; Ytterbium; Oxidative Annealing
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S003602361311020X

It has been shown that, during vacuum sintering of a material based on the 0.804Y 2 O 3 · 0.196Yb 2 O 3 cubic solid solution, ytterbium is partially reduced to the divalent state and forms with yttria cubic solid solutions with heterovalent cation substitution, which is accompanied by the appearance of oxygen vacancies and the introduction of the doubly charged cation into crystal lattice voids. The concomitant decrease in the content of oxygen-occupied tetrahedral sites leads to the expansion of the cubic close packing of the metal so that the cubic unit cell parameter a increases to 10.5745 Å. After the oxidative annealing of the ceramics in air, the a value decreases to 10.5718 Å. The optical spectroscopic properties of transparent Y 2 O 3 :Yb ceramic materials after treatment in different media have been studied.