Formation and photoluminescence of pure hexagonal and monoclinic Sm2+/Sm3+ codoped BaAl2Si2O8 phase using a simple sol–gel technique. Issue 8 (September 2015)

• Record Type: Journal Article
• Authors: Li, Ling; Liu, Xiaoguang; Mi Noh, Hyeon; Kee Moon, Byung; Chun Choi, Byung; Hyun Jeong, Jung
• Is Part Of: Ceramics international. Volume 41:Issue 8(2015)
• Page Start: 9722
• Page End: 9728
• Publication Date: 2015-09
• Subjects: Sm2+/Sm3+ -- Phase formation -- Pure hexagonal and monoclinic -- BaAl2Si2O8; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.04.043
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The synthesis of pure hexagonal and monoclinic BaAl2 Si2 O8 :Sm crystals using a simple sol–gel technique is discussed in detail. The pure hexagonal BaAl2 Si2 O8 :Sm phase (H-BASO:Sm) can be obtained by adjusting the amount of the citric acid. The pure monoclinic BaAl2 Si2 O8 :Sm phase (M-BASO:Sm) can be easily obtained by a three-step-calcinations process. Possibly it is the carbon existing in the crystal that can stabilize the hexagonal BaAl2 Si2 O8 :Sm phase (H-BASO:Sm) and retard the conversion from the hexagonal to monoclinic phase. Photoluminescence, UV–vis absorption spectra and X-ray photoelectron spectra (XPS) demonstrate the existence of Sm 2+ and Sm 3+ ions in Sm doped H-BASO and M-BASO calcined under a reducing atmosphere. Photoluminescence properties of Sm 3+ and Sm 2+ ions in M-BASO and Sm 2+ ions in H-BASO are reported.