Influence of Rare-Earth (Doped) on Low-Density Bi1.6Pb0.4Sr2Ca1.9RE0.1Cu3Oδ (RE=Nd, Er) Superconductors via Co-Precipitation Method

2016 ◽  
Vol 846 ◽  
pp. 574-578
Author(s):  
H. Azhan ◽  
I.N. Syuhaida ◽  
K. Azman ◽  
C.M.N. Azura ◽  
M. Robaiah ◽  
...  
Keyword(s):  
Rare Earth ◽  
Volume Fraction ◽  
Single Step ◽  
Precipitation Method ◽  
Low Density ◽  
Standard Samples ◽  
Step Transition ◽  
Co Precipitation ◽  
Er Doped ◽  
Rare Earth Doped

Effect of Ca doped by rare-earth elements, Nd and Er (x=0.10) on the structural and transport properties of low density Bi1.6Pb0.4Sr2Ca1,9RE0.1Cu3Oδ (RE=Nd,Er) samples have been investigated. The samples have been prepared via co-precipitation (COP) method from precipitate of saturated solutions of metal acetates, iso-propanol solution and oxalic acid. The metal oxalates powder was subjected to thermal treatment of 24 hours calcination at 845oC and mixed with 0.10 g sucrose C12H22O11 which is used as supplementary filler. The pelletized powder was heated for 2 hours at 400 oC and sintered for at 850oC for 48 hours. All samples show a single step transition in the R-T curves. The critical current density (Jc) and transition temperature (Tczero) for both Nd and Er doped with x = 0.10 were found to be lower than standard samples. Tczero obtained varies between 98 K and 66 K. XRD data showed the decrease of volume fraction for the Bi-2223 phase and increase of the volume fraction Bi-2212 phase with the doping of Nd and Er.

scholarly journals Structure, Luminescence, and Magnetic Properties of Crystalline Manganese Tungstate Doped with Rare Earth Ion

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3717
Author(s):  
Jae-Young Jung ◽  
Soung-Soo Yi ◽  
Dong-Hyun Hwang ◽  
Chang-Sik Son
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Sintering Temperature ◽  
Luminescent Properties ◽  
Concentration Quenching ◽  
Rare Earth Ions ◽  
Precipitation Method ◽  
Rare Earth Ion ◽  
Co Precipitation ◽  
Quenching Phenomenon

The precursor prepared by co-precipitation method was sintered at various temperatures to synthesize crystalline manganese tungstate (MnWO4). Sintered MnWO4 showed the best crystallinity at a sintering temperature of 800 °C. Rare earth ion (Dysprosium; Dy3+) was added when preparing the precursor to enhance the magnetic and luminescent properties of crystalline MnWO4 based on these sintering temperature conditions. As the amount of rare earth ions was changed, the magnetic and luminescent characteristics were enhanced; however, after 0.1 mol.%, the luminescent characteristics decreased due to the concentration quenching phenomenon. In addition, a composite was prepared by mixing MnWO4 powder, with enhanced magnetism and luminescence properties due to the addition of dysprosium, with epoxy. To one of the two prepared composites a magnetic field was applied to induce alignment of the MnWO4 particles. Aligned particles showed stronger luminescence than the composite sample prepared with unsorted particles. As a result of this, it was suggested that it can be used as phosphor and a photosensitizer by utilizing the magnetic and luminescent properties of the synthesized MnWO4 powder with the addition of rare earth ions.

scholarly journals Co-precipitation of rare-earth-doped Y_2O_3 and MgO nanocomposites for mid-infrared solid-state lasers

2016 ◽  
Vol 56 (3) ◽  
pp. B154 ◽  
Author(s):  
Victoria L. Blair ◽  
Zackery D. Fleischman ◽  
Larry D. Merkle ◽  
Nicholas Ku ◽  
Carli A. Moorehead
Keyword(s):  
Rare Earth ◽  
Solid State ◽  
Solid State Lasers ◽  
Mid Infrared ◽  
Co Precipitation ◽  
Rare Earth Doped

scholarly journals Effect of Co-solvent on the Performance of LDHs Photocatalytic Degradation of Methyl Orange Solution

2021 ◽  
Author(s):  
Liang Huang ◽  
Xianghui Jin ◽  
xumei Tao ◽  
Chen Yang ◽  
Yuanyuan Han
Keyword(s):  
Methyl Orange ◽  
Ethylene Glycol ◽  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
Photocatalytic Performance ◽  
Mixed Solvent ◽  
Volume Fraction ◽  
Precipitation Method ◽  
Co Precipitation ◽  
Degradation Of Methyl Orange

Abstract In this paper, NiAlCe hydrotalcite was prepared by co-precipitation method and hydrothermal method in different volume fractions of ethylene glycol-water mixed solvent and polyethylene glycol-water mixed solvent, and the effect of photocatalytic degradation of methyl orange under ultraviolet light was studied. Samples were characterized by XRD, XPS, UV-Vis and FT-IR in order to find the reasons for the improvement of photocatalytic performance under co-solvent system. NiAlCe-10%EG(h) and NiAlCe-15%PEG(h) had smaller particle size, which was beneficial to photocatalytic performance. The degradation rate of methyl orange could reach up to 100% in 42 min using NiAlCe hydrotalcite with 10% volume fraction of EG and in 48 min using NiAlCe hydrotalcite with 15% volume fraction of PEG. The photocatalytic effect of NiAlCe hydrotalcite samples prepared by hydrothermal method were better than that prepared by co-precipitation method. This provided a new type of catalyst for the degradation of dyes: preparing with ethylene glycol-water mixed solvent.

The magnetic properties of permanent strontium ferrite doped with rare-earth by chemical co-precipitation method

2018 ◽  
Vol 529 (1) ◽  
pp. 120-127 ◽  
Author(s):  
Ze Wu ◽  
Ruonan Zhang ◽  
Zhaowei Yu ◽  
Lianwei Shan ◽  
Limin Dong ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Strontium Ferrite ◽  
Precipitation Method ◽  
Co Precipitation

Structure and Dielectric Properties of (Gd0.4Sm0.5Yb0.1)2(Zr1-xCex)2O7 Ceramics

2010 ◽  
Vol 105-106 ◽  
pp. 394-397
Author(s):  
Ling Liu ◽  
Qiang Xu ◽  
Fu Chi Wang
Keyword(s):  
Rare Earth ◽  
Dielectric Properties ◽  
Pyrochlore Structure ◽  
Microwave Frequency ◽  
Phase Region ◽  
Dielectric Constants ◽  
Precipitation Method ◽  
Low Dielectric ◽  
Pyrochlore Type ◽  
Co Precipitation

Complex rare-earth zirconates (Gd0.4Sm0.5Yb0.1)2(Zr1-xCex)2O7 (x=0, 0.3, 0.4) powders were synthesized by co-precipitation method. XRD and SEM results revealed that the complex rare-earth zirconates with single pyrochlore structure were prepared and no other phases existed among the grains. The dielectric properties of these compounds were investigated at low and microwave frequencies. It was found that they have intermediate dielectric constants and low dielectric loss in the whole frequency region, and they show the dielectric permittivity with weak frequency dependence. Substituting Zr4+ by Ce4+ leaded to smaller permittivity. Meanwhile, the dielectric contant values increase with increasing in the r(A3+)/r(B4+) value in the pyrochlore-type phase region, which can be explained by the increase in the degree of ordering of oxygen vacancy. This new series of pyrochlore type oxides would be potential candidates for electronic ceramic applications and microwave frequency components.

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