Cathodoluminescence of Ce3+- and Eu2+-Activated Alkaline Earth Feldspars

Abstract

The compounds MA12Si2Os, where M----Ca, Sr, or Ba, were synthesized. Compositions in the three binary systems were also prepared. Cathodoluminescence of these compositions activated with Ce 3+ and Eu 2+ was studied. It was found that the Ca and Sr feldspars formed complete solid solutions. In the systems Ba-Ca feldspars and Ba-Sr feldspars, only partial solid solutions are formed. The solid solubility limits are SrA12Si2Os to Sr0.6Bao.4A12Si2Os and BaA12Si._,Os to Ba0.sSro.~A12Si2Os CaA12Si208 to Ca0.gBa0.1A12Si2Os and BaA12Si2Os to Ba0.6Ca0.4A12Si2Os tem to study the effect of crystal chemical variation ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.173.72.87 Downloaded on 2014-12-26 to IP Vol. 118, No. 6 ALKALINE EARTH FELDSPARS 919 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.173.72.87 Downloaded on 2014-12-26 to IP

Emission properties of Eu2+, Mn2+ in MAl2Si2O8 (M=Sr, Ba)

“…For alkaline-earth feldspars, half of SiO 4 tetrahedra are substituted by AlO 4 tetrahedra, and alkaline-earth cations Ca 2+ /Sr 2+ /Ba 2+ are introduced to neutralize the negative charge. The different size of cations Ca 2+ /Sr 2+ /Ba 2+ causes different crystal symmetry and there are several polymorphs of feldspars for each alkaline earth [6][7][8].…”

Spectral and kinetic characterization of orange-red emitting Sr3Al2O6:Eu3+/Sm3+phosphor

“…2. For Eu doping, a non-linear increase in the PL intensity was observed for samples coded as SKE [1][2][3][4][5] . For SKE 5 (concentration 1.0 mol.%), maximum PL intensity was observed.…”

“…These materials are successfully used in various applications like luminous paints for highways, airport, buildings, ceramic products, textile industry, the dial plate of glow watches, warning signs, escape routes, etc. [1][2][3]. In recent times, various phases of strontium aluminate have been synthesized, and include Sr 4 Al 14 O 25 [4], SrAl 2 O 4 [5], SrAl 12 O 19 [6], and SrAl 4 O 7 [7].…”

Luminescent Characteristics of Blue Phosphor CaAl2Si2O8:Eu2+in White LED Applications by Solid State Method

“…These compounds exhibit strong 4f 6 5d 1 -4f 7 luminescence on doping Eu 2+ . A series of solid solutions containing isostructural members with slightly different size cations as hosts, such as MAl 2 Si 2 O 8 (M = Ca, Sr, Ba) would be an ideal system to study the effect of crystal chemical variation on the luminescence of Eu 2+ ions, and may offer possibilities for commercial application [18,19].…”