YAG based phosphors, synthesized in a field of radiation

Лисицын, В. М.; Golkovsky, M. G.; Мусаханов, Д. А.; Тулегенова, А. Т.; Абдуллин, Х.А.; Aitzhanov, M. B.

doi:10.1088/1742-6596/1115/5/052007

Cited by 12 publications

(9 citation statements)

References 7 publications

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“…The radiation technology for the synthesis of luminescent ceramics based on refractory oxides was first implemented by the authors of this work [16]. The presented results of the work confirm that radiation synthesis of dielectric refractory materials can hold great promise.…”

Section: Discussion Of the Results Of Studies Of The Luminescent Char...supporting

confidence: 63%

“…A mixture of MgF 2 powders with an activator in the form of WO 3 powder under the action of a high-energy electron flow from an ELV 6 accelerator in 1 s was transformed into a ceramic with properties characteristic of a LiF:W scintillator [14]. The works showed the possibility of radiation synthesis of luminescent ceramics based on MgF 2 :W [15], YAG [16]. Under the action of a powerful flow of electrons from the charge, ceramics with properties characteristic of YAG phosphors were formed.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Luminescence efficiency of cerium-doped yttrium aluminum garnet ceramics formed by radiation assisted synthesis

Alpyssova

Лисицын

Golkovski

et al. 2021

EEJET

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The variety of applications of yttrium-aluminum garnet (YAG)-based luminescent materials and the morphology necessary for these purposes required the development of many technologies for their synthesis. All synthesis technologies used are complex. The structural phase of yttrium-aluminum garnet is formed with any technology, at temperatures exceeding 1,500 °C. The starting materials for the synthesis are metal oxides of aluminum, yttrium and other oxides for activation and modification. It seems possible to use hard radiation to form a new phase. Radiation synthesis of ceramics is realized in less than 1 s, without the use of any additives and influences. The synthesis was carried out at the electron accelerator of the Institute of Nuclear Physics (Novosibirsk). In this work, we studied the spectral-kinetic and quantitative characteristics of luminescence for the first time obtained by the method of radiation synthesis of ceramic samples of yttrium-aluminum garnet doped with cerium with statistical processing of their values. The dependences of the reproducibility of the spectral characteristics of the luminescence of the samples on the preliminary preparation of the charge for synthesis have been investigated. Several cycles of luminophore brightness studies have been performed. It is shown that the obtained ceramics based on yttrium-aluminum garnet doped with cerium possesses the required spectral-kinetic properties, and the efficiency of conversion of the chip radiation into luminescence is achieved, which is comparable to that available in commercial phosphors. The maximum measured values of the position of the bands are from 553.5 to 559.6 nm. Brightness values range from 4,720 to 1,960 cd/m2. It was found that the main reason for the scatter in the characteristics of the luminescent properties of ceramics of yttrium-aluminum garnet, activated by cerium obtained by radiation assisted synthesis is the high rate of synthesis and, especially, the high rate of cooling of the samples.

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Section: Discussion Of the Results Of Studies Of The Luminescent Char...supporting

confidence: 63%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Luminescence efficiency of cerium-doped yttrium aluminum garnet ceramics formed by radiation assisted synthesis

Alpyssova

Лисицын

Golkovski

et al. 2021

EEJET

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“…The impact of hard radiation beams during the synthesis process can contribute to the necessary reactions between the medium elements and increase the efficiency of the formation of a new structure [ 10 , 11 ]. In [ 12 , 13 ], the possibility of synthesizing ceramics based on refractory metal fluorides and oxides was shown for the first time by directly exposing the mixture to flows of high-energy electrons with a high-power density.…”

Section: Introductionmentioning

confidence: 99%

Express Synthesis of YAG:Ce Ceramics in the High-Energy Electrons Flow Field

et al. 2023

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YAG:Ce ceramics by the direct action of an electron beam with 1.4 MeV energy were synthesized on a mixture of a stoichiometric composition of Y, Al, and Ce oxides without adding any substances to facilitate the process. The synthesis is realized in a time less than 1 s. The main structural phase of the obtained ceramics is YAG and YAP can be additional. The luminescence characteristics of the synthesized samples, the excitation, luminescence, decay time, and pulsed cathodoluminescence spectra, are similar to those known for YAG:Ce phosphors. The conversion efficiency of the excitation energy into the luminescence of the samples reaches 60–70% of those used for the manufacture of LED phosphors. The set of processes that determine the rate and efficiency of radiation synthesis differs from those occurring during thermal methods by the existence of a high degree of the initial compositions’ ionization under the influence of a radiation flux and a high probability of the decay of electronic excitations into short-lived radiolysis products.

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“…Представляется перспективным использование метода радиационного синтеза для получения образцов керамики для изучения зависимостей свойств от исходного состава шихты. Возможность использования радиации для синтеза керамики из тугоплавких оксидов была продемонстрирована на примере иттрий алюминиевого граната ИАГ : Се [5][6]. Радиационный синтез керамики реализуется за короткое время из смеси оксидов металлов стехиометрического состава, не требующей сложной подготовки.…”

Section: Introductionunclassified

Радиационный синтез и люминесцентные свойства Y-=SUB=-3-=/SUB=-Al-=SUB=-x-=/SUB=-Ga-=SUB=-5-x-=/SUB=-O-=SUB=-12-=/SUB=-:Ce керамики

Лисицын¹,

Гречкина²,

Тулегенова³

2023

Физика Твердого Тела

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Y3AlxGa5-xO12:Ce ceramics with an Al/Ga ratio from 5/0 to 0/5 was synthesized for the first time by direct impact of a powerful electron beam with an energy of 1.4 MeV on a charge of stoichiometric composition. The study results of dependence of the spectral properties and the conversion efficiency the excitation energy into luminescence on the ceramic composition are presented. A difference was found between the dependences of the efficiency of transformation of the excitation energy into luminescence on the Al/Ga ratio upon excitation of cerium ions at 450 and 337 nm.

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YAG based phosphors, synthesized in a field of radiation

Cited by 12 publications

References 7 publications

Luminescence efficiency of cerium-doped yttrium aluminum garnet ceramics formed by radiation assisted synthesis

Luminescence efficiency of cerium-doped yttrium aluminum garnet ceramics formed by radiation assisted synthesis

Express Synthesis of YAG:Ce Ceramics in the High-Energy Electrons Flow Field

Радиационный синтез и люминесцентные свойства Y-=SUB=-3-=/SUB=-Al-=SUB=-x-=/SUB=-Ga-=SUB=-5-x-=/SUB=-O-=SUB=-12-=/SUB=-:Ce керамики

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