Survival of Fragmented BO Units in Highly Modified Rare-Earth-Rich Borate Glasses.

Highly modified LaO-YO-BO ternary glasses were fabricated by using a levitation technique. The thermal and structural properties of (50 - )LaO-YO-50BO glasses and (60 - )LaO-YO-40BO glasses were investigated. Raman scattering spectra indicated that B atoms mainly formed isolated planar BO triangles similar to those of crystalline LaBO.

Ab Initio Molecular Dynamics Study of Trivalent Rare Earth Rich Borate Glasses: Structural Insights and Formation Mechanisms.

In this work, trivalent rare earth (RE)-rich borate glasses (30 LaO-70 BO, 50 LaO-50 BO, 60 LaO-40 BO, and 50 YO-50 BO) were modeled using ab initio molecular dynamics (AIMD) simulations through the melt-quenching route. It was found that the AIMD-derived structures reproduced the experimental structure factors and B solid-state nuclear magnetic resonance data. Isolated borate units (monomers, dimers, and trimers) terminated with nonbridging oxygen were found in the structures.

Crystal-Like Atomic Arrangement and Optical Properties of 25LaO-75MoO Binary Glasses Composed of Isolated MoO.

Transparent and brown LaO-MoO binary glasses were prepared in bulk form using a levitation technique. The glass-forming range was limited, with the primary composition being approximately 25 mol % LaO. The 25LaO-75MoO glass exhibited a clear crystallization at 546 °C, while determining its glass transition temperature was difficult.