Influence of Gd2O3 on the microstructure and properties of transparent MgAl2O4: Cr3+ ceramic

Yan, Hongxia; Zhang, Hongjie; Liu, Biao; Zhang, Kuibao

doi:10.1016/j.ceramint.2022.10.090

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…However, the reduction of Bi ions is complex and challenging to control, 19–21 necessitating the exploration of alternative approaches to broaden their emission spectrum. Gd 2 O 3 is a promising matrix material for this purpose due to its high thermal stability, low phonon energy, and excellent chemical durability 22–24 . Additionally, Gd ions, as lanthanide rare‐earth ions, are known to enhance the luminescence of other luminescent ions and act as photosensitizers 25–27 .…”

Section: Introductionmentioning

confidence: 99%

“…Gd 2 O 3 is a promising matrix material for this purpose due to its high thermal stability, low phonon energy, and excellent chemical durability. [22][23][24] Additionally, Gd ions, as lanthanide rare-earth ions, are known to enhance the luminescence of other luminescent ions and act as photosensitizers. [25][26][27] For example, Luewarasirikul et al 28 observed that the addition of Gd 3+ into Dy 3+ -doped Ba-Na-B glass significantly improved the luminescence and quantum efficiency of the glass.…”

Section: Introductionmentioning

confidence: 99%

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Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd₂O₃ co‐doping

Zhang,

Lai,

et al. 2024

J Am Ceram Soc.

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The doping of bismuth (Bi) ions in borosilicate glasses has gained attention for its potential applications in LED light sources and imaging displays. Here, gadolinium oxide (Gd2O3) was introduced into the glass matrix in varying concentrations using a high‐temperature melting method to investigate its impact on the luminescence properties of Bi ions. The resulting glass exhibited bimodal emission peaks at 465 and 750 nm when excited with 325 nm light. The luminescence intensity and fluorescence half width at half height initially increased, followed by a subsequent decrease as the Gd2O3 content in the glass increased from 10 to 43 mol%. Additionally, the color of the luminescence transformed from purple–red to green under white light irradiation. The composition and excitation wavelength of the glass can be adjusted to achieve selective tuning of the luminescence.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd₂O₃ co‐doping

Zhang,

Lai,

et al. 2024

J Am Ceram Soc.

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“…TiO 2 formed the TiAl 2 O 5 phase not only in the grain boundary region but also in the grain interior through the reaction with spinel. MgAl 2 O 4 has the characteristics of high melting point, good thermal shock resistance, and good chemical stability, [8][9][10] and is widely used in ceramics, [11][12][13] optics, 14,15 cement, [16][17][18] metallurgy, [19][20][21] and other fields, and its excellent performance meets most requirements of heat storage materials for solar thermal power generation systems. However, the synthesis temperature of MgAl 2 O 4 is higher.…”

Section: Introductionmentioning

confidence: 99%

Study on magnesia alumina spinel heat storage ceramics for solar thermal power generation

Xu,

Cheng,

Hao

et al. 2024

Int J Applied Ceramic Tech

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Solar thermal storage ceramic materials use photothermal power generation technology to store heat energy, which is an important way to use clean energy and reduce carbon emissions. In this paper, MgAl2O4 ceramics were prepared by pressureless sintering with fused magnesia and α‐Al2O3 as the primary raw materials and TiO2 as the additive. The phase composition, microstructure, physical properties, thermal shock resistance, and thermal physical properties of MgAl2O4 thermal storage ceramics were studied. The results show that the main crystalline phase of B4 is MgAl2O4 and the secondary crystalline phase is MgTi2O5. Ti4+ is dissolved into MgAl2O4 lattice, which distorts the lattice, reduces activation energy, and promotes sintering. The sample B4 (69.73 wt% α‐Al2O3, 30.27 wt% fused magnesia, and 7 wt% TiO2) sintered at 1510°C had the best comprehensive physical properties, and its bending strength and bulk density were 89.41 MPa and 3.27 g/cm3, respectively. After 30 thermal shock cycles, the bending strength of the sample B4 is slightly lost. The thermal stress generated during the expansion and contraction of the grain volume led to the decrease of the bending strength. From room temperature to 1000°C, the specific heat capacity of sample B4 is .44–1.25 J/(g·K). The heat capacity increases with the increase of temperature, and the heat storage density increases. The heat storage density is 1218.75 kJ/kg (1000°C). Heat capacity increases with temperature due to intensified lattice vibration at high temperatures. Therefore, magnesia alumina spinel ceramics show great potential in solar thermal energy storage.

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Optimization of Ca additive and HIP condition in fabrication of the transparent MgAl2O4 ceramics

Kim,

Park,

et al. 2024

International Journal of Refractory Metals and Hard Materials

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Influence of Gd2O3 on the microstructure and properties of transparent MgAl2O4: Cr3+ ceramic

Cited by 5 publications

References 26 publications

Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd₂O₃ co‐doping

Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd₂O₃ co‐doping

Study on magnesia alumina spinel heat storage ceramics for solar thermal power generation

Optimization of Ca additive and HIP condition in fabrication of the transparent MgAl2O4 ceramics

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Influence of Gd2O3 on the microstructure and properties of transparent MgAl2O4: Cr3+ ceramic

Cited by 5 publications

References 26 publications

Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd2O3 co‐doping

Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd2O3 co‐doping

Study on magnesia alumina spinel heat storage ceramics for solar thermal power generation

Optimization of Ca additive and HIP condition in fabrication of the transparent MgAl2O4 ceramics

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Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd₂O₃ co‐doping

Tunable broadband luminescence of Bi‐ion‐doped glasses via Gd₂O₃ co‐doping