Strontium ions concentration dependent modifications on structural and optical features of Li4Sr(BO3)3 glass

Obayes, Hayder Khudhair; Wagiran, Husin; Hussin, Rosli; Saeed, Muhammad

doi:10.1016/j.molstruc.2016.01.088

Cited by 26 publications

(5 citation statements)

References 42 publications

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“…The glass samples disclosed exceptional thermal stability as their and values are far greater than 100 and 0.1, respectively [13]. The corresponding values which measure forming ability of the glasses is at the upper boundary of the Kauzmann relation ( ) [29]. The attained thermal stability against crystallization on heating may aid in avoiding some of the current challenges of SSL materials, such as CCT drift.…”

Section: Resultsmentioning

confidence: 98%

“…However, borate glass is hygroscopic and has high phonon energy, ensuring poor quantum e ciency and emission cross-section [13], [28]. The alkali and alkali earth metals (Li and Sr) were used as modi ers to improve hygroscopicity and strengthen chemical and mechanical properties via the generation of optically good non-bridging oxygen, whereas Zn increased electron-releasing ability [29] [27], [30], [31]. Coupling Dy 3+ with AuNPs emerged as a possible alternative to boost quantum e ciency and emission cross-section by improving absorption crosssections of Dy 3+ [6], [32].…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Ahmad,

Yam,

Hashim

et al. 2024

Preprint

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This paper reports the white solid-state lighting potential of gold nanoparticles-imbued Dy3+-doped Li2CO3–SrO–ZnO–B2O3 glasses prepared using melt quenching. The produced materials undergo characterizations using various instrumentations to access the sensitivity of changing AuNP concentrations on their emission and colorimetric characteristics. XRD phase analysis established that the samples were glasses. TEM analysis shows AuNPs, whereas EDX spectroscopic analysis confirmed the inclusion of precursor elements into the glasses. The thermal stability, Hruby parameter, and glass-forming ability are 146 to 156 oC, 1.27 to 1.39, and 66-0.65, respectively. The optical absorption spectra of the glasses are consistent with Dy3+ transitions, while the surface plasmon resonance band fits the AuNPs characteristics band. The emission spectroscopic analysis reveals 1.52, 1.84, and 1.14 intensification for 6H15/2, 6H13/2, and 6H11/2 transitions. The Judd-Ofelt evaluation was made to support the experimental spectroscopic data. The CIE coordinates were traced to the cool white colour field with a purity of 15.64-7.79 % and CCT values of 5491-5437 K. The excellent thermal properties, enhanced emission, and improved colorimetric properties such as colour purity and natural daylight (cool) CCT values were due to the inclusion of AuNPs in the proposed glasses, which may be helpful in white solid-state lighting applications.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Ahmad,

Yam,

Hashim

et al. 2024

Preprint

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“…[ 37 ] The peak that appeared at 1754 can be assigned to the Sr─O group. [ 38 ] These descriptions show that prepared cathode materials are in composite form. [ 39 ]…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Nanocomposite Perovskite Cathode Materials La_0.3Sr_0.7Fe_0.4Ti_0.6O_3‐δ (LSFT) for Low‐Temperature SOFCs with Incorporation of Graphene Oxide (GO)

Ahmad,

Abbas,

Ahmad

et al. 2023

Cryst. Res. Technol.

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The porous and mixed ionic electronic cathode conductor plays a vital role in the efficient working of low‐temperature solid oxide fuel cells. Perovskite composite cathode material La0.3Sr0.7Fe0.4Ti0.6O3‐δ (LSFT) is synthesized using the sol–gel method. Graphene oxide (GO) is integrated in 1 and 1.5 wt.% into the perovskite LSFT cathode to use as a cathode for low‐temperature solid oxide fuel cell (LT‐SOFC). Crystal structure analysis is studied by XRD and the crystalline size of samples is determined in the range of 103–73 nm. SEM analysis is used to characterize homogeneous and porous morphology. The FTIR spectral analysis is examined for proposed nanocomposite cathode materials. The electrical conductivities are carried out by four probe method in air atmosphere in the temperature range 300–600 °C and enhanced conductivity is obtained 7 Scm−1 for LSFT‐1.5 wt.% GO sample. For the same sample, a minimum value of area‐specific resistance (ASR) of 0.02 Ωcm2 is obtained. The performance of three‐layer fuel cells is tested by supplying H2 fueled at the anode and oxygen at the cathode terminal of the cell and peak power density is determined to be 362 mWcm−2 for GO incorporated fuel cell. The prepared cathode can be proposed as a potential candidate for low‐temperature solid oxide fuel cells.

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“…According to the literature, in the range of 700 cm -1 to 1200 cm -1 stretching vibrations of B-O bonds occur. [51][52][53][54] Due to the strong absorbance of the NCM851005 material in the FT-IR spectra no further signals were detectable. DRIFTS spectra of the NCM851005 materials still showed high absorbance.…”

Section: Resultsmentioning

confidence: 99%

Coating of Li_1+x[Ni_0.85Co_0.10Mn_0.05]_1−xO₂ Cathode Active Material with Gaseous BF₃

Eisele

Skrotzki

Schneider

et al. 2020

J. Electrochem. Soc.

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Ni-rich cathode active material Li 1+x [Ni 0.85 Co 0.10 Mn 0.05 ] 1−x O 2 (NCM851005) was exposed to BF 3 gas at room temperature with pressures between 25 mbar and 2478 mbar. It mainly gave an LiBF 4 coating by reaction with the basic surface lithium impurities. The electrochemical investigations up to full-cell level displayed a significantly improved long-term cycling behavior at 45 °C for only 0.08 wt% BF 3 coated NCM851005 material, compared to pristine NCM851005 material. The internal resistance of full-cells was reduced for all tested amounts of BF 3 coating (after 300 cycles: pristine NCM851005 +293% and 0.08 wt% BF 3 coated NCM851005 +133% resistance built-up). Moreover, online electrochemical mass spectrometry studies showed a reduced CO 2 release in the first cycle of half-cells built with the coated NCM851005 material compared to those with pristine NCM851005 material. The thermal annealing of the coated NCM851005 material at 200 °C or 400 °C led to a decrease of LiBF 4 , but to an increase of LiF content on the surface. However, coated NCM851005 material with thermal annealing exhibits lower discharge capacities after 250 cycles compared to NCM851005 material with equal coating amount, which were not thermally annealed.

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Strontium ions concentration dependent modifications on structural and optical features of Li4Sr(BO3)3 glass

Cited by 26 publications

References 42 publications

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Preparation and Characterization of Nanocomposite Perovskite Cathode Materials La_0.3Sr_0.7Fe_0.4Ti_0.6O_3‐δ (LSFT) for Low‐Temperature SOFCs with Incorporation of Graphene Oxide (GO)

Coating of Li_1+x[Ni_0.85Co_0.10Mn_0.05]_1−xO₂ Cathode Active Material with Gaseous BF₃

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Strontium ions concentration dependent modifications on structural and optical features of Li4Sr(BO3)3 glass

Cited by 26 publications

References 42 publications

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Preparation and Characterization of Nanocomposite Perovskite Cathode Materials La0.3Sr0.7Fe0.4Ti0.6O3‐δ (LSFT) for Low‐Temperature SOFCs with Incorporation of Graphene Oxide (GO)

Coating of Li1+x[Ni0.85Co0.10Mn0.05]1−xO2 Cathode Active Material with Gaseous BF3

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Preparation and Characterization of Nanocomposite Perovskite Cathode Materials La_0.3Sr_0.7Fe_0.4Ti_0.6O_3‐δ (LSFT) for Low‐Temperature SOFCs with Incorporation of Graphene Oxide (GO)

Coating of Li_1+x[Ni_0.85Co_0.10Mn_0.05]_1−xO₂ Cathode Active Material with Gaseous BF₃