Structure and properties of non-alkali aluminoborosilicate glass containing RE (RE = La, Ce, Nd, Dy, Y, Yb) oxides

Wang, Weinian; Cao, Zhiqiang; Du, Rui; Ruan, Jian; Wang, Jing; Liu, Chao; Xie, Jun; Han, Jianjun

doi:10.1016/j.jnoncrysol.2019.04.031

Cited by 17 publications

(5 citation statements)

References 20 publications

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“…As the temperature increases, the thermal motion amplitude of the particles in the glass also increases, resulting in larger particle spacing and the external manifestation is expansion [36][37][38][39]. The effect of the different La 2 O 3 /CaO ratios on the thermal expansion characteristics of the studied glasses are shown in Figure 6.…”

Section: The Coefficient Of Thermal Expansionmentioning

confidence: 98%

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EFFECT OF REPLACEMENT OF CaO BY La₂O₃ ON THE STRUCTURE, THERMAL AND DIELECTRIC PROPERTIES OF ALKALI-FREE ALUMINOBOROSILICATE GLASSES

Wu¹

2023

Ceramics - Silikaty

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Alkali-free aluminoborosilicate glasses were prepared by the conventional melting method. The effect of the replacement of CaO by La 2 O 3 on the structure, thermal, and dielectric properties of the glasses was investigated by FTIR, DSC, with thermal expansion instruments, and an impedance analyser. With increasing ratios of La 2 O 3 to CaO, the densities of the glasses increased linearly from 2.458 to 2.627 g•cm -3 . Meanwhile, the polymerisation degree of the glass network increased first and then decreased. The glass transition temperature, crystallisation onset temperature and expansion softening temperature showed a gradually increasing trend, while the thermal stability firstly deteriorated, then gradually improved. Additionally, the coefficient of thermal expansion (CTE), dielectric constant and dielectric loss initially decreased, followed by an increase. The sample with the La 2 O 3 /CaO ratio of 1.00 showed excellent properties: had a low CTE (2.71 × 10 -6 °C-1 ), had a dielectric constant (5.23), and a dielectric loss (1.12 × 10 -3 ), which means it is a promising material for integrated circuit packaging applications.

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Section: The Coefficient Of Thermal Expansionmentioning

confidence: 98%

“…In addition, the relatively larger radius of La 3+ would elicit a definite degree of deformation in the network structure with further La 2 O 3 / /CaO growth. The deformed network structure is more susceptible to vibrations during heat treatment, thereby leading to an increase in CTE [37].…”

Section: The Coefficient Of Thermal Expansionmentioning

confidence: 99%

EFFECT OF REPLACEMENT OF CaO BY La₂O₃ ON THE STRUCTURE, THERMAL AND DIELECTRIC PROPERTIES OF ALKALI-FREE ALUMINOBOROSILICATE GLASSES

Wu¹

2023

Ceramics - Silikaty

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“…However, there are relatively few studies on the luminescence characteristics of phosphors with SrLaAl3O7 as the host and single-doped Dy 3+ . Rare earth ion-doped phosphors play a vital role in plasma display panels (PDP), light-emitting diodes (LED) and solid-state lighting due to their numerous luminescence characteristics, which have attracted extensive attention from researchers [16][17][18][19]. As we all know, before preparing and researching a certain kind of doped phosphors, it is necessary to select the appropriate luminescent center and host material of the phosphor.…”

Section: -4mentioning

confidence: 99%

Preparation and Luminescent Properties of SrLaAl3O7: Dy3+ White-light Phosphors

2022

JRSE

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White phosphors of single-substrate SrLa1-xAl3O7: xDy 3+ (x=0.01~0.08) have been successfully prepared by the high-temperature solid-phase method and the results show the best sintering temperature is 900°C. The phase of the phosphors analyzed by X-Ray diffraction (XRD) shows that the doping of Dy 3+ essentially unchange the crystal structure of the matrix SrLaAl3O7. 3+ in the matrix is 0.05. SrLa0.95Al3O7: 0.05Dy 3+ phosphor exhibits white light emission under 347 nm excitation, chromaticity coordinates are (0.343, 0.364), and color temperature is 5109 K. These results reveal SrLaAl3O7: Dy 3+ is a great single doped white light phosphor which is suitable for daily lighting use. The morphology and energy spectrum of phosphors of SrLa1-xAl3O7: xDy 3+ were carried out with a field emission scanning electron microscope (FESEM). The concentration quenching effect of the sample comes from the exchange interaction between Dy 3+ , and the optimal doping concentration of Dy

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“…The dielectric constants of RE‐doped glasses are generally higher than those of RE‐free glass. Glass prepared with Yb 2 O 3 was found to possess the best acid resistance (10 vol.% HF) and alkali resistance (5 mass% NaOH), due to increased polymerization related to the cation field strength of Yb 3+ 31 …”

Section: Introductionmentioning

confidence: 99%

“…Glass properties can change with RE size as well. Wang et al 31 reported that RE oxide (La, Ce, Nd, Dy, Y or Yb) doping affects the network connectivity, chemical stability, thermal properties, and dielectric properties of nonalkali aluminoborosilicate glasses. The dielectric constants of RE‐doped glasses are generally higher than those of RE‐free glass.…”

Section: Introductionmentioning

confidence: 99%

Partitioning of rare earths in multiphase nuclear waste glass‐ceramics

Chen

Marcial

Ahmadzadeh

et al. 2020

Int J of Appl Glass Sci

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Alumino‐borosilicate glass‐ceramics (GCs) containing alkali (Na), alkaline earth (Ca), rare earth (RE) (one of La … Lu, Y), and transition metals (Zr and Mo) were formulated to test the effects of composition and RE cation size on the crystallization of simulated nuclear waste GCs. Eight‐oxide glasses were formulated in the peraluminous ([Na2Oexcess]=[Na2O]‐[Al2O3]‐[ZrO2]<0) region with 10 mol.% RE2O3 and 15 mol.% B2O3. Glasses were melted and quenched, reheated, and slow‐cooled to promote crystallization, and then characterized using quantitative X‐ray diffraction and electron probe microanalysis. Transition metal phases [powellite (Ca,Na,RE)MoO4 and zirconia (Zr,RE)O2 or zircon (Zr,RE)SiO4] always formed, while borosilicate (RE3BSi2O10) or silicate [oxyapatite (RE,Ca,Na)10Si6O26 or keiviite (RE2Si2O7)] plus borate (REBO3) phases also formed, depending on the size of the RE cation and hence its preferred coordination number. All crystalline phases were found to contain RE elements, and often phases incorporated other cations (Zr, Ca, B) which were not nominally part of their pure stoichiometry. These results suggested that the glass formulation and RE size strongly influenced the RE environment in the glass and hence the crystal phases formed. The formation of RE borosilicate, versus separate RE borate and RE silicate phases, also suggested original differences in the glass structure.

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Structure and properties of non-alkali aluminoborosilicate glass containing RE (RE = La, Ce, Nd, Dy, Y, Yb) oxides

Cited by 17 publications

References 20 publications

EFFECT OF REPLACEMENT OF CaO BY La₂O₃ ON THE STRUCTURE, THERMAL AND DIELECTRIC PROPERTIES OF ALKALI-FREE ALUMINOBOROSILICATE GLASSES

EFFECT OF REPLACEMENT OF CaO BY La₂O₃ ON THE STRUCTURE, THERMAL AND DIELECTRIC PROPERTIES OF ALKALI-FREE ALUMINOBOROSILICATE GLASSES

Preparation and Luminescent Properties of SrLaAl3O7: Dy3+ White-light Phosphors

Partitioning of rare earths in multiphase nuclear waste glass‐ceramics

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Structure and properties of non-alkali aluminoborosilicate glass containing RE (RE = La, Ce, Nd, Dy, Y, Yb) oxides

Cited by 17 publications

References 20 publications

EFFECT OF REPLACEMENT OF CaO BY La₂O₃ ON THE STRUCTURE, THERMAL AND DIELECTRIC PROPERTIES OF ALKALI-FREE ALUMINOBOROSILICATE GLASSES

EFFECT OF REPLACEMENT OF CaO BY La₂O₃ ON THE STRUCTURE, THERMAL AND DIELECTRIC PROPERTIES OF ALKALI-FREE ALUMINOBOROSILICATE GLASSES

Preparation and Luminescent Properties of SrLaAl3O7: Dy3+ White-light Phosphors

Partitioning of rare earths in multiphase nuclear waste glass‐ceramics

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Structure and properties of non-alkali aluminoborosilicate glass containing RE (RE = La, Ce, Nd, Dy, Y, Yb) oxides