Synthesis of High‐Performance BaMgAl₁₀O₁₇:Eu²⁺ Phosphor Through a Facile Aqua‐Suspension Method

Abstract

High‐performance BaMgAl10O17:Eu2+ (BAM) phosphor was prepared by a facile aqua‐suspension method, based on the in situ surface charge modification of starting powders with the aid of the γ‐Al2O3 porous structure. When stirred in de‐ionized water at 80°C, the starting powders of BaCO3, MgO, and Eu2O3 were positive surface charged, and attracted by the porous and negative charged γ‐Al2O3 powders. Through the electrostatic effect, high uniformed BAM precursor was achieved after the aqua‐medium was removed. Fourier transform infrared (FTIR) spectra indicated some new chemical bonds among the reactants of the BAM precursor, which improved the powder activity and made it possible to achieve high‐performance BAM phosphor at a lower calcination temperature. The obtained BAM phosphor exhibited a narrow particle size distribution, enhanced crystallinity, and a short decay time.