X-ray Fluorescence of Eu3+ Ions in Glassy and Polycrystalline Lithium Tetraborate

Danilyuk, P. S.; Puga, P. P.; Krasilinets, V. N.; Gomonaĭ, A. I.; Puga, G. D.; Різак, В. М.; Turok, I. I.

doi:10.1134/s1087659618010066

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Вони є важливими для потенційного застосування в якості суперіонних провідників для виготовлення твердих електролітів, а відтак і твердотільних джерел електроенергії, а матриця тканиноеквівалентного Li2B4O7 у різних фазових станах є перспективною для термолюмінесцентної дозиметрії. Тому вивченню спектроскопічних характеристик цього матеріалу приділяється значна увага дослідників [1][2][3][4][5][6][7][8][9][10][11][12]. Для використання таких електролітів важливим є знання про зв'язок між структурою і іонною провідністю, яка багато в чому пов'язана із природою взаємодії суперіонних комплексів у системі B2O3-Li2O.…”

Section: вступunclassified

КОМБІНАЦІЙНЕ РОЗСІЮВАННЯ СВІТЛА У СКЛОПОДІБНОМУ Li2B4O7

Puga¹,

Danyliuk²,

Rizak³

et al. 2019

J. of Chem. and Tech.

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Lithium tetraborate is a promising material to be used in the production of solid electrolytes and solid-state batteries. A powerful tool for investigating its structure in the B2O3-Li2O system is Raman spectroscopy. The Raman spectra were investigated using the XploRA PLUS (HORIBA Jobin Yvon) Raman spectrometer at the temperature of T = 300 K within the 70-2000 cm-1 range. The excitation wavelength was 785 nm, the spectral resolution was no worse than 1 cm-1. As a result of the study, we have determined the nature of vibrational modes. We detected a fine structure in the 70-400 cm-1 range, which we found to correspond to normal vibration of the lithium-oxygen structural complexes in the structure of [LiO6] frames, and also vibrations and librations of [LiO6] frame and the BO3 and BO4 groups in the structure of [B4O7] 2cluster as a whole. In the 400-800 cm-1 range the superposition of vibrations of [LiO4] clusters and [BO4] tetrahedrons takes place, whereas their normal vibrations are detected in the 800-1354 cm-1 range. In the 1300-2000 cm-1 range we observed the manifestation of two-phonon states, the normal vibrations of borate rings, and the symmetric stretching of the BO3 flat triangles, and detected two peaks that have not been observed previously. The obtained results show that the Raman spectra of glassy Li2B4O7 generally display a single-mode behavior and are caused by a combination of vibrations of different types which are interconnected via the frame structure of the glass consisting of complex boronoxygen and lithium-oxygen structural complexes.

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Section: вступunclassified

КОМБІНАЦІЙНЕ РОЗСІЮВАННЯ СВІТЛА У СКЛОПОДІБНОМУ Li2B4O7

Puga¹,

Danyliuk²,

Rizak³

et al. 2019

J. of Chem. and Tech.

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“…Nowadays, many researches related with different type of glass such as Pb-Based Silicate, Borate, and Phosphate glasses [14] heavy metal oxide glasses [15,16], heavy metal fluoride based tellurite-rich glasses [17], optical glasses [18], bismuth borate glasses [19] have been carried out to determine shielding properties. Lithium borate glasses (LBGs) could be good candidate for shielding purpose among the other type of glasses due to high radiation resistance, linear dose dependence in a wide range of doses and high transparency in the spectral range from vacuum ultraviolet to the far infrared region [20]. Colemanite (2CaO.3B2O3.5H2O) is calcium borate mineral.…”

Section: Introductionmentioning

confidence: 99%

Gama Işınları için Kolemanit Minerali Katkılı Koruyucu Yeni Cam Malzeme

Yorgun¹

2019

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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In this study, (Li2B4O7)(100-x)-(Colemanite)x glass systems (where x=10, 20, 30 and 40 wt %) were fabricated via melt quenching technique. The radiation shielding parameters of produced glasses such as mass attenuation coefficient (µ ), effective atomic number (Zeff), electron density (Nel), half value layer (HVL) and mean free path (MFP) were measured experimentally for 81, 276, 302, 356, and 383 keV gamma ray energies with Hp-Ge detector. Also, WinXCom software was employed for theoretical calculation above radiation shielding parameters of glasses for 1 keV to 10 5 MeV energy region. It was seen that the experimental and theoretical results are good agreement with each other. The obtained results revealed that when percentage of colemanite mineral has been increased in the glass system, µ , Zeff and Nel values increase. Furthermore, it was observed that the values of HVL and MFP, in contrary, decreases with increasing colemanite mineral percent. In specific, among the investigated glasses, lithium borate glass with 40 percentage colemanite mineral has the highest value of µ , Zeff and Nel, however, it has the lowest HVL and MFP. Therefore, lithium borate glass with 40 percentage colemanite mineral has given the best results for gamma radiation shielding purpose among the investigated glass systems in this work.

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“…They also have significant magnetic, catalytic, and phosphorescent properties [4,5]. In recent years, there has been great interest in synthesis of family of the lithium borates, borosilicates and oxyborates, such as Eu 3+ doped Li 2 B 4 O 7 [6], Cu + doped LiB 3 O 5 [7], Sm 3+ doped LYBO glasses [8], Dy 3+ doped Lithium zinc borosilicate glasses [9], LiY 6 O 5 (BO 3 ) 3 [10], co-doped Li 6 Gd(BO 3 ) 3 :Tb 3+ , Eu 3+ , Bi 3+ [11], Ce 3+ doped Li 6 Ln(BO 3 ) 3 (Ln =Gd, Y) [12], Eu 3+ doped Li 6 Ln(BO 3 ) 3 (Ln =Gd, Y) [13], Li 3 Ln 2 (BO 3 ) 3 (Ln = La, Yb) [14], Li 3 Ln 2 (BO 3 ) 3 (Ln=Nd, Eu, Dy and Yb) and Li 6 Ln(BO 3 ) 3 (Ln=Dy and Yb) [15], Li 3 Sm 2 (BO 3 ) 3 [16], K 3 Y 3 (BO 3 ) 4 [17], LiGd 6 O 5 (BO 3 ) 3 [18], etc. These compounds mostly crystallize in the monoclinic space group of P2 1 /c with Z=4 [11].…”

Section: Introductionmentioning

confidence: 99%

Structural and Luminescence Properties of Li3Y2(BO3)3 Synthesized by Solid-State Reactions

Gacanoğlu¹,

Güler²,

Teke³

et al. 2018

Journal of Boron

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A new binary metal borate compound, trilithiumdiyttriumorthoborate, Li 3 Y 2 (BO 3) 3 was successfully synthesized by a solid-state reaction at 1000 °C using the initial reactants of Li 2 CO 3 , Y 2 O 3 , and H 3 BO 3 (molar ratio in the order; 1.5:1:3). The phase, crystallinity and size distribution of Li 3 Y 2 (BO 3) 3 was investigated by X-Ray Powder Diffraction (XRD) and Scanning Electron Microscopy (SEM). It was found that single phase Li 3 Y 2 (BO 3) 3 crystallizes in orthorhombic crystal with refined unit cell parameters of a=8.9228, b=9.5840, c=20.4469Å, Z=9 and represent the space group of Pmmm. Average particle size was calculated as 70 nm by Scherrer's equation. The luminescence properties of Li 3 Y 2 (BO 3) 3 were investigated by using steady state photoluminescence (PL) measurement as a function of temperature between 10 to 300 K. It was observed that the spectra are dominated with the transitions in the visible part of spectrum related to defects present in compound. A relatively low intensity band-to-band transition was also observed at high energy side of the spectrum centred at around 3.33 eV. This peak was decomposed into two close peaks at 3.32 and 3.35 eV using Gaussian fitting. From the temperature behaviour of peak energies of these emissions, the band gap of Li 3 Y 2 (BO 3) 3 was estimated to be 3.35 eV for the first time.

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X-ray Fluorescence of Eu3+ Ions in Glassy and Polycrystalline Lithium Tetraborate

Cited by 5 publications

References 22 publications

КОМБІНАЦІЙНЕ РОЗСІЮВАННЯ СВІТЛА У СКЛОПОДІБНОМУ Li2B4O7

КОМБІНАЦІЙНЕ РОЗСІЮВАННЯ СВІТЛА У СКЛОПОДІБНОМУ Li2B4O7

Gama Işınları için Kolemanit Minerali Katkılı Koruyucu Yeni Cam Malzeme

Structural and Luminescence Properties of Li3Y2(BO3)3 Synthesized by Solid-State Reactions

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