scholarly journals High Eu3+ concentration quenching in Y3TaO7 solid solution for orange-reddish emission in photonics

RSC Advances ◽  
2020 ◽  
Vol 10 (29) ◽  
pp. 16917-16927
Author(s):  
Fernanda Hediger Borges ◽  
Fábio José Caixeta ◽  
Rafael Ramiro Pereira ◽  
Silvana Ruella de Oliveira ◽  
Rute A. S. Ferreira ◽  
...  
Keyword(s):  
Solid Solution ◽  
Crystallization Process ◽  
Concentration Quenching ◽  
Color Purity ◽  
High Concentration

Eu3+ ions influence on the crystallization process of Y3TaO7 solid solution and this particular host has presented a high concentration quenching (30 mol%), displaying an intense orange-reddish emission, with color purity over 92.6%.

Crystallization Process of Fe73.5Cu1Nb3Si13.5B9

1992 ◽  
Vol 286 ◽  
Author(s):  
H. Nakabayasiii ◽  
M. Doi ◽  
M. Matsui ◽  
M. Doyama
Keyword(s):  
Solid Solution ◽  
Crystallization Process ◽  
Volume Fraction ◽  
Magnetic Phase ◽  
Partially Ordered ◽  
Annealing Temperatures ◽  
Random Anisotropy ◽  
Anisotropy Model ◽  
The Relationship ◽  
Maximum Permeability

ABSTRACTTo clarify the relation between high magnetic permeability and magnetic phases of Fe73.5Cu1Nb3Si13.5B9 ribbons, the process of precipitation was investigated by using the Xray diffraction, DTA, VSM and the Mössbauer spectra at various annealing temperatures. The volume fraction of each magnetic phase was estimated. The sample annealed at 853K which shows maximum permeability is composed of partially ordered Fe3Si(70%), Fe(B) solid solution(10%) and amorphous(20%) phases. The relative permeability of the sample annealed below 853K increases with increasing the volume fraction of both of the Fe3Si partially ordered and the Fe(B) solid solution phases. The relationship between tile permeability and the volume fraction is interpreted by the random anisotropy model.

scholarly journals Highly efficient red-emitting Ca2YSbO6:Eu3+ double perovskite phosphors for warm WLEDs

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20742-20748 ◽  
Author(s):  
Meijiao Liu ◽  
Biao Shen ◽  
Keyuan Wang ◽  
Jiasong Zhong ◽  
Daqin Chen
Keyword(s):  
Quantum Efficiency ◽  
Potential Application ◽  
Double Perovskite ◽  
Concentration Quenching ◽  
High Concentration ◽  
Highly Efficient ◽  
Red Emitting Phosphor

A double perovskite Ca2YSbO6:Eu3+ red-emitting phosphor with high concentration quenching and excellent quantum efficiency was developed to find a potential application in warm WLEDs.

A THEORETICAL INTERPRETATION FOR THE EXCITATION ENERGY TRANSFER BETWEEN IDENTICAL MOLECULES IN LIQUID AND SOLID SOLUTION OF HIGH CONCENTRATION

1996 ◽  
Vol 10 (08) ◽  
pp. 347-352
Author(s):  
A.L. PHILIPPETIS
Keyword(s):  
Solid Solution ◽  
Energy Transfer ◽  
Excitation Energy ◽  
Solid Solutions ◽  
Excitation Energy Transfer ◽  
Experimental Results ◽  
Theoretical Interpretation ◽  
Coupling Constant ◽  
High Concentration ◽  
Migration Of Energy

In this work we refer to some experimental results related. as we believe, with excitation energy transfer between molecules of the same kind in liquid and solid solutions of high concentration. We try to explain these results by a theoretical interpretation based on the assumption that the “migration of energy” depends on the distance between the molecules, the orientation of these molecules and on a coupling constant related with the type of these molecules.

Small-size and monodispersed red-emitting Pr3+ doped barium molybdate nanocrystals with ultrahigh color purity

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65311-65314 ◽  
Author(s):  
Xuyong Yang ◽  
Fei Huang ◽  
Zhenwei Huang ◽  
Fan Cao ◽  
Jianhua Zhang
Keyword(s):  
Solid Solution ◽  
Solution Method ◽  
Spectral Purity ◽  
Color Purity ◽  
Narrow Linewidth ◽  
Barium Molybdate

Small-size and monodispersed BaMoO4:Pr3+ nanocrystals (NCs) have been prepared by a simple and efficient liquid–solid–solution method. These NCs exhibit narrow-linewidth emission (only ∼4 nm) with high spectral purity in red.

scholarly journals Effect of Melt Overheating on Structure and Mechanical Properties of Al-Mg-Si Cast Alloy

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1353
Author(s):  
Vladislav Deev ◽  
Evgeny Prusov ◽  
Ernst Ri ◽  
Olga Prihodko ◽  
Svetlana Smetanyuk ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Crystallization Process ◽  
Cast Alloy ◽  
Degree Of Saturation ◽  
Structural Components ◽  
Pouring Temperature ◽  
Aluminum Solid Solution ◽  
Fast Cooling ◽  
Average Size

The paper discusses the complex effect of melt overheating with subsequent fast cooling down to the pouring temperature on the crystallization process, microstructure and mechanical properties of Al-Mg-Si aluminum alloy. The results obtained facilitated the establishment of rational modes of melt overheating, leading to a significant change in the dispersion and morphology of structural components. In particular, with an increase in the melt overheating temperature to 900 °C with holding and subsequent rapid cooling to the casting temperature, a decrease in the average size of dendritic cells of the aluminum solid solution from 39 μm to 13 μm was observed. We also noticed the refinement of eutectic inclusions of the Mg2Si phase with compact morphology. An increased level of mechanical properties was noted; the maximum values of tensile strength and elongation reached 228 MPa and 5.24%, respectively, which exceeded the initial values by 22.5% and 52.3%, correspondingly. The microhardness of the aluminum solid solution sequentially increased from 38.21 to 56.5 HV with an increase in the temperature during melt overheating. According to the EDS linear scanning, an increase in the superheat temperature of the melt is accompanied by an increase in the degree of saturation of the solid solution with magnesium.

scholarly journals Corrected Nordheim's Rule in high concentration Al-Mg solid solution.

1998 ◽  
Vol 48 (6) ◽  
pp. 294-298 ◽  
Author(s):  
Shin-ya KOMATSU ◽  
Masahiko IKEDA ◽  
Tomohiro KOHMOTO ◽  
Yoshiaki TABATA ◽  
Takahiro TANIMOTO
Keyword(s):  
Solid Solution ◽  
High Concentration

Europium doped lanthanum zirconate nanoparticles with high concentration quenching

2014 ◽  
Vol 49 ◽  
pp. 114-118 ◽  
Author(s):  
Suresh B. Alaparthi ◽  
Long Lu ◽  
Yue Tian ◽  
Yuanbing Mao
Keyword(s):  
Concentration Quenching ◽  
High Concentration ◽  
Lanthanum Zirconate

EXPERIMENTAL EVIDENCE FOR SUPERPARAMAGNETISM IN NANOCRYSTALLINE Fe-BASED METALLIC GLASS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 942-945 ◽  
Author(s):  
A. ŚLAWSKA-WANIEWSKA ◽  
M. GUTOWSKI ◽  
H.K. LACHOWICZ ◽  
T. KULIK ◽  
H. MATYJA
Keyword(s):  
Solid Solution ◽  
Metallic Glass ◽  
Magnetic Moment ◽  
Crystallization Temperature ◽  
Crystallization Process ◽  
Elevated Temperatures ◽  
Wide Distribution ◽  
Particle Sizes ◽  
Magnetization Curves ◽  
Kinetics Of

Annealing of the initially amorphous Fe66Cr8Cu1Nb3Si9B13 metallic glass above its crystallization temperature leads to the ultrafine crystalline structure of the bcc-FeSi solid solution with a relatively wide distribution of the particle sizes 9≤D≤35 nm. At elevated temperatures the magnetization curves no longer show hysteresis and ideal superparamagnetic behavior is observed. The kinetics of magnetic moment increase during the crystallization process at the time of annealing is also presented.

The Ternary System Phase Equilibrium of KCl-NH4Cl-H2O at 80°C

2013 ◽  
Vol 834-836 ◽  
pp. 519-522
Author(s):  
Bin Zhao ◽  
Guo Yue Geng ◽  
Jian Xin Chen ◽  
Shao Feng Zhang ◽  
Yin Hui Li ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Phase Equilibrium ◽  
Ternary System ◽  
Crystallization Process ◽  
Equilibrium Relation ◽  
Crystallization Region ◽  
Solution Region ◽  
Solid Liquid ◽  
System Phase

The ternary system of solid-liquid phase equilibrium relation of KCl-NH4Cl-H2O was studied at 80 °C. The solubility data of KCl and NH4Cl in water were obtained by isothermal equilibrium method, and the phase diagram of the system was plotted. The result showed that this system exist six phase regions: i.e. the unsaturated solution region, pure KCl , pure NH4Cl, the solid solution base of KCl, the solid solution base of NH4Cl and their common crystallization region with the solid solution base of KCl and the solid solution base of NH4Cl crystallization regions. Some crystallization area will be changed with the various temperature, According to the phase diagram, it can be calculated the quantity of evaporated water in the crystallization process of KCl-NH4Cl-H2O and controlled the change of concentration in the evaporation process preferably.

Mechanical Crystallization of Metglas Fe78B13Si9 by Cryogenic High Energy Ball Milling

1995 ◽  
Vol 400 ◽  
Author(s):  
B. Huang ◽  
R.J. Perez ◽  
P.J. Crawford ◽  
S.R. Nutt ◽  
E.J. Lavernia
Keyword(s):  
Solid Solution ◽  
Ball Milling ◽  
Crystallization Process ◽  
Supersaturated Solid Solution ◽  
Nanocrystalline Material ◽  
Shear Bands ◽  
Nanocrystalline Structure ◽  
High Energy ◽  
Cryogenic Milling ◽  
Energy Ball

AbstractA nanocrystalline material was synthesized by cryogenic ball milling of Metglas Fe78B13Si9 ribbons. The nanocrystalline structure consisted of α-Fe(Si) and Fe2B grains of 2-13 nm in diameter. In the early stages of milling, bending-induced shear bands were formed, followed by the initial stages of crystallization. As the milling proceeded, predominantly wearlike mechanisms caused further crystallization. The crystallization process was slowed considerably by the addition of 17 at.% Ni during cryogenic milling. The results indicate that the 17 at.% Ni did not form a supersaturated solid solution in the metallic glass, but impeded crystallization by reducing the efficiency of bending and wear-like mechanisms during milling.

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