The surface of an up-conversion luminescence material was modified by overcoating with SiO2, which was synthesized from a hydrolysis progress of tetraethoxysila
Lithium-substituted LixMn2O4 (x = 0.98, 1.03, 1.08) spinel samples were synthesized by solid-state reaction.X-ray diffraction (XRD) patts show that the prepared