Wydział Chemii

K. A. Prokop

S. Cottrino

V. Garnier

G. Fantozzi

M. Siczek

K. Rola

E. Tomaszewicz

Y. Guyot

G. Boulon

M. Guzik

2026

Journal of the European Ceramic Society

46

117968/1-117968/13

10.1016/j.jeurceramsoc.2025.117968

Naukowa

Angielski

Artykuł

This study explores BaLaLiWO₆ (BLLW) and BaLaNaWO₆ (BLNW), both cubic perovskite-type tungstates, as potential hosts for optical ceramics. Pure-phase un-doped and Nd³⁺-doped micro-powders were synthesized via solid-state reaction. Their crystal structures, morphologies, and spectroscopic properties were systematically analyzed. Notably, the crystal structure of BLNW was solved from a single crystal for the first time. Substituting Li⁺ ion with a larger Na⁺ led to lattice expansion and enhanced thermal stability, with BLLW stable up to 1130 °C. SEM analysis revealed microstructures with particle sizes of 0.9–3.9 μm (BLLW) and 1.6–6.2 μm (BLNW). Nd³⁺ ions, introduced as structural probes, enabled assessment of local ordering through low-temperature absorption and luminescence spectroscopy. The findings indicated a greater structural order in BLNW, as evidenced by narrower absorption bands and reduced Stark splitting (104 cm⁻¹ for BLNW vs. 117 cm⁻¹ for BLLW). A ⁴I_9/2 ground-state energy level diagram for the Nd³⁺ ion in both hosts has been proposed.

Perovskite-type tungstates, Optical materials, Micro-crystalline powders, Nd3+ dopant

http://dx.doi.org/10.1016/j.jeurceramsoc.2025.117968

http://www.elsevier.com