Structure and optical properties of lithium aluminosilicate glassceramics containing Ho3+-doped and Ho3+/Yb3+ co-doped YNbO4 nanocrystals

Transparent lithium aluminosilicate glass-ceramics containing nanosized orthorhombic (7–10 nm), or tetragonal (14–25 nm) and monoclinic (10–17 nm) crystals of rare-earth (RE) orthoniobates Ho³⁺:YNbO₄ or Ho³⁺/Yb³⁺:YNbO₄ and β-quartz or β-spodumene solid solution (ss) were prepared by secondary heat t