Luminescence of the tungsten-activated MgF2 ceramics synthesized under the electron beam

Лисицын, В. М.; Лисицына, Л. А.; Dauletbekova, А.; Голковский, М. Г.; Karipbayev, Zhakyp; Мусаханов, Д. А.; Аkilbekov, A.; Zdorovets, Maxim V.; Kozlovskiy, Artem L.; Полисадова, Е. Ф.

doi:10.1016/j.nimb.2017.11.012

Cited by 24 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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%

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

Alpyssova

Лисицын

Golkovski

et al. 2021

EEJET

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Particularly interesting and fundamentally new findings were obtained for a combined effect of powerful radiation fluxes and high temperatures (the so-called radiationthermal effects). The most striking of these findings is the effect of multiple acceleration of synthesis [6][7][8][9][10][11] and sintering [12][13][14][15][16][17][18][19][20][21][22] of inorganic powder materials. The processes of ferrite material sintering under radiation-thermal effect have been most fully studied for lithium-titanium ferrites and similar structures [23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2021

Eurasian phys. tech. j.

View full text Add to dashboard Cite

The studies of correlation between magnetic properties and microstructure were conducted on samples of lithium-substituted ferrite, sintered in radiation and radiation-thermal conditions. Radiation-thermal sintering was performed for compacts irradiated with a pulsed electron beam with energy of (1.5-2.0) MeV, beam current per pulse of (0.5-0.9) A, irradiation pulse duration of 500 μs, pulse repetition rate of (5-50) Hz, and compact heating rate of 1000 C/min. Sintering in thermal furnaces (T-sintering) was carried out in a preheated chamber electric furnace. The paper shows that magnetic induction does not depend on the ferrite grain size. In this case, the coercive force is inversely proportional to the grain size and depends on the intragranular porosity of ferrite samples. In contrast to thermal sintering, radiation-thermal sintering does not cause capturing of intergranular voids by growing grains and enhances coagulation of intragranular pores.

show abstract

“…The vibronic laser systems based on Co-doped MgF 2 are unique, because it has been demonstrated to lase efficiently, in a range of energies between 1960 and 2080 nm of practical interest. For practical long-term applications, it is also important to know and understand the properties of radiation defects and processes that have been studied and discussed in [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Ab initio calculations of pure and Co+2-doped MgF2 crystals

Usseinov

Gryaznov

Попов

et al. 2020

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

Ab initio calculations of the atomic, electronic and vibrational structure of a pure and Co +2 doped MgF 2 crystals were performed and discussed. We demonstrate that Co +2 (3d 7 ) ions substituting for Mg is in the high spin state. In particular, the role of exact non-local exchange is emphasized for a proper reproduction of not only the band gap but also other MgF 2 bulk properties. It allows us for reliable estimate of the dopant energy levels position in the band gap, and its comparison with the experimental data. Thus, the present ab initio calculations and experiment data demonstrate that the Co +2 ground state level lies at ≈2 eV above the valence band top.

show abstract

Luminescence of the tungsten-activated MgF2 ceramics synthesized under the electron beam

Cited by 24 publications

References 10 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

Untitled

Ab initio calculations of pure and Co+2-doped MgF2 crystals

Contact Info

Product

Resources

About