EFFECT OF DIFFERENT FLUXES ON YAG:Ce
ILLUMINATION ENGINEERING PARAMETERS
M. S. Shama,
S. N. Kichuk,
S. V. Kostyukov,
P. E. Voronov,
A. V. Voronova,
N. A. Popova,
and E. S. Lukin
Translated from Novye Ogneupory, No. 8, pp. 50 – 53, August 2015.
Original article submitted April 29, 2015.
Research is devoted to studying properties of YAG:Ce luminophores prepared by reverse heterophase
coprecipitation followed by annealing. Luminophore specimens are synthesized using fluxes of different com
position and with different grain size. Property indices are determined for the specimens obtained by elec
tron-probe analysis methods for phase chemical composition, x-ray phase analysis, and spectrofluorimetry.
Keywords: HCBS, YAG:Ce luminophores, yttrium-aluminum garnet, coprecipitation, effect of fluxes,
luminophore illumination engineering parameters.
Luminescent materials based on YAG:Ce are used exten-
sively as white light emitting diodes. Currently there is an
enormous amount of publications for synthesis and study of
aluminum garnet activated with cerium, although it should
be noted that in the Russian Federation currently no
luminophores are prepared on the basis of YAG:Ce, compa
rable in brightness and light coordinate of leading overseas
analogs. There is a considerable amount of work about the
effect of adding different lanthanoids on luminophore prop
erties. In this work research is provided for synthesis of
YAG:Ce with 97 – 100% of the brightness of Intermatix
company luminophores and an average particle size of not
more than 100 mm. Main attention is devoted to the role of
mineralizers on luminophore synthesis.
Currently there is an enormous number of different
methods for preparing luminescent materials for different ap
plication areas in science and technology.
Yttrium-aluminum garnet was first prepared by the
American scientists Keith and Joder at the start of the 1960s.
So far an enormous number of procedures have been devel-
oped for synthesizing compounds with a garnet structure. At
this time the most widespread and developed methods are
solid-phase reaction, a sol-gel method, precipitation in the
form of hydroxides and oxalates followed by treatment at
high temperature, and a “freezing” method. These methods
may be used to prepare garnet within which yttrium and alu
minum are partly or entirely replaced by gadolinium, scan
dium, gallium, iron, and other elements .
A synthesis method for functional materials affects com
position, structure, particle size, and determines the techno
logical efficiency of the preparation process. An important
area for contemporary research in the field of synthesizing
materials based on REE is development of specific proce
dures for their creation and revealing the most effective of
Methods combining simplicity and availability with eco
logical security and high product yield with guaranteed
achievement of good brightness indices, are most promising.
AND DISCUSSION OF RESULTS
In this work the optimum synthesis method was selected
as precipitation in the form of hydroxides using an aqueous
ammonia precipitating component.
Refractories and Industrial Ceramics Vol. 56, No. 4, November, 2015
1083-4877/15/05604-0421 © 2015 Springer Science+Business Media New York
FGAOU VPO North-Kavkaz Federal University, Stavropol’,
FGBOU VPO D. I. Mendeleev Russian Chemical Technology
University, Moscow, Russia.