Rapid combustion method for surface modification of strontium aluminate phosphors with high water resistance

• Published in: Applied surface science Vol. 258; no. 18; pp. 6814 - 6818
• Main Authors: Qu, Yang, Liu, Yingliang, Yu, Caixia, Zhu, Guoxian, Sha, Lei, Yang, Yunhua, Zheng, Mingtao, Lei, Bingfu
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.2012; Elsevier
• Subjects: Aluminates; Combustion; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Phosphors; Physics; Rapid combustion method; Scanning electron microscopy; Strontium; Strontium aluminate phosphors; Surface modification; Water resistance; X-ray photoelectron spectroscopy; X-rays; Surface modification; Rapid combustion method; Strontium aluminate phosphors; Water; Strontium; Phosphors; Surface treatments; Combustion
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2012.03.105

The XRD profiles of phosphors showed that SrAl2B2O7 phase was formed by solid-state reaction between strontium aluminate and boracic acid in the process of surface modification. [Display omitted] ► Rapid combustion method was introduced into surface modification of SrAl2O4:Eu2+, Dy3+. ► SrAl2B2O7 layer was formed on the surface of strontium aluminate phosphors. ► Water resistance of strontium aluminate phosphors was enhanced by surface modification. A rapid combustion method was introduced into surface modification of strontium aluminate phosphors, which improved the water resistance of phosphors. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), pH measurements and photoluminescence (PL) spectrophotometry were used to characterize the phosphors before and after modification respectively. Experimental results showed that compact layer of SrAl2B2O7 substance was formed on the surface of strontium aluminate phosphors by direct chemical reaction between strontium aluminate and boracic acid. SrAl2B2O7 substance is chemically stable in water and could improve water resistance of strontium aluminate phosphors effectively.