Synthesis of HgSr2-xYxCa2Cu3O8+ δ Superconducting Compound

2021 ◽  
Vol 886 ◽  
pp. 42-47
Author(s):  
Mustafa K. Kamil ◽  
Maher A. Hasan ◽  
Kareem Ali Jasim ◽  
Auday H. Shaban
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Electrical Resistance ◽  
Partial Substitution ◽  
Special Focus ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Electrical Properties ◽  
Superconducting Compound ◽  
Yttrium Concentration

The superconductivity phenomenon and the method of preparing the superconductingmercury-based (HgSr2-xYxCa2Cu3O8+δ with x=0 to 0.15) compound were presented in this paper. The physical properties of the compound are presented at a high temperature, with a special focus on the effect of partial substitution of strontium with Yttrium (Y). The effect on structural and electrical properties were investigated. All the samples in the present investigation were subjected to gross structural characterization by X-ray diffraction. The XRD data collected from various have the Hg1223 phase and the analysis showed that all samples correspond to the tetragonal structure. The electrical resistance uses the four probe technology to find the critical temperature and found that it drops from 116 K to 81K by increase the yttrium concentration.

Assessment of Laser Effects on the Structure and Electrical Properties of the Compound Bi2-xAgxSr2Ca2Cu3O10+δ Superconducting

2021 ◽  
Vol 19 (11) ◽  
pp. 108-115
Author(s):  
Nihad Ali Shafeek
Keyword(s):  
Critical Temperature ◽  
Hydraulic Press ◽  
Electrical Characteristics ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
Compensation Ratio ◽  
Superconducting Compound ◽  
State Method ◽  
Two Stages

This research contains preparing the superconducting compound Bi2-xAgxSr2Ca2Cu3O10+δ and studying its structural and electrical characteristics. The samples were prepared using the solid-state method in two stages, and different concentrations of x were (x= 0.2,0.4,0.6,0.8) replaced instead of bismuth Bi. Then, using a hydraulic press 9 ton/cm2 and sintering with a temperature of 850°C, the samples were pressed. Next, x-ray diffraction is used to study the structural properties. The study of these samples was presented in different proportions of x values, where x = 0.4 is the best compensation ratio of x. A critical temperature of 1400C and the Tetragonal structure was got. After that, the effect of laser nidinium _ yak (Nd: YAG laser) was used on the compositional. It was found that the temperature value increased, so we got the best critical temperature, which is 142 0C.

Superconducting Compound Hg0.8Sb0.2Ba2Ca2Cu3O8+δ Compared with Hg0.8Sb0.2Ba2Ca1Cu2O6+δ to Evaluate Transition Temperature

2020 ◽  
Vol 18 (11) ◽  
pp. 14-18
Author(s):  
Abbas K. Saadon ◽  
Kareem A. Jasim ◽  
Auday H. Shaban
Keyword(s):  
High Temperature ◽  
Transition Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Hot Spot ◽  
Solid State Reaction Method ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Superconducting Compound

The high temperature superconductor’s compounds are one of the hot spot field of science, due to their applications in industries. Hg0.8Sb0.2Ba2Ca2Cu3O8+δ and Hg0.8Sb0.2Ba2Ca1Cu2O6+δ, were manufactured using a doable-step of solid state reaction method. The samples were sintered at 800 ° C. The transition temperatures Tc are found from electrically resistively by using four probe techniques. The resistivity become zero when the transition temperature Tc(offset) have 131 and 119 K, and the onset temperature Tc(onset) have 139 K for Hg0.8Sb0.2Ba2Ca2Cu3O8+δ and 132 K for Hg0.8Sb0.2Ba2Ca1Cu2O6+δ. Analysis of X-ray diffraction showed a tetragonal structure with lattice parameters changes for all samples.

VARIATION OF Tc IN SINGLE PHASE Bi4Sr3Ca3Cu4O16−x SYSTEM

1990 ◽  
Vol 04 (22) ◽  
pp. 1385-1391 ◽  
Author(s):  
M. NASIR KHAN ◽  
FARID A. KHWAJA
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Solid State ◽  
Single Phase ◽  
High Temperature Superconductor ◽  
Interlayer Spacing ◽  
Nominal Composition ◽  
X Ray Diffraction ◽  
Electrical Measurements ◽  
X Ray

The variation of critical temperature Tc in a single-phased ceramic high temperature superconductor Bi 4 Sr 3 Ca 3 Cu 4 O y is studied using techniques like X-ray diffraction, magnetic and electrical measurements. Samples of Bi-Sr-Ca-CuO having nominal composition 4334 are synthesized by solid state reaction using appropriate amounts of Bi 2O3, SrCO 3, CaCO 3 and CuO powders. It has been shown that the Tc in this material can be raised from 98 K in the fast quenched sample to 120 K in the furnace-cooled one. The higher values of Tc in furnace cooled specimens as compared with the Tc in quenched samples have been attributed to the variation in the interlayer spacing in these compounds. It is concluded that electron density and hence the attractive interaction between pairs are increased due to shortening of the interlayer spacing in the furnace-cooled sample, leading to an increase of its Tc.

On the Stability of YBa2Cu3O7-y with Refractory Ceramics

1989 ◽  
Vol 169 ◽  
Author(s):  
P. Del Angel ◽  
J. M. Dominguez ◽  
C. Falcony ◽  
O. Guzman ◽  
A. Montoya ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrical Resistance ◽  
Partial Substitution ◽  
X Ray Diffraction ◽  
Electrical Measurements ◽  
Ceramic Oxides ◽  
X Ray ◽  
The Stability ◽  
Refractory Ceramics ◽  
Scanning Electron

AbstractA series of ceramic oxides were prepared by adding alumina to the superconductor YBaCuO. The solids were characterized by X-ray diffraction, transmission (TEM) and scanning electron microscopy (SEM) with EDS and electrical measurements. Partial drops in electrical resistance (R ≠ 0) indicate the presence of superconducting phases trapped in ceramic masses. Additionally, the systematic diminution of Tc could indicate a partial substitution of Cu by Al.

Studying the Physical Properties of Bi-2223 Nanostructure Prepared Thermal Treatment Method

2021 ◽  
Vol 1039 ◽  
pp. 269-273
Author(s):  
Zaid K. Alkaabi ◽  
Emad K. Al-Shakarchi
Keyword(s):  
Crystal Structure ◽  
Critical Temperature ◽  
Thermal Treatment ◽  
Electrical Resistance ◽  
Preparation Method ◽  
Treatment Method ◽  
Standard Document ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Difference

Recently, the researchers gave a great interest in the superconducting topic, as the preparation method is importance to reach a high critical temperature. In this study, the Bi2Sr2Ca2Cu3O10 (Bi-2223) compound prepared by thermal treatment method at different sintering temperatures such as (600, 700, 850) °C at (7) PH for (20 hrs). The phase formation was observed by X-ray diffraction, as well as information about the crystal structure, as the peaks were almost identical to the international standard document. the peaks are well indexed by tetragonal phase of Bi-2223. The results of the electrical resistance test showed that there is a difference in the critical temperature depending on the difference of the sintering temperatures The best result was at a temperature of 850 ° C. The sizes of the nanoparticles ranged from (22 - 123) nm, this is what the TEM measurements showed. It has been shown to be a successful method for preparing superconducting nanoparticles as (Bi-2223) compound

A44_ Effect of Nano-Sized ZnO on Electrical & Structural Properties of High Temperature Tl2-x HgxBa2Ca2Cu3O10-δ Superconductors

2014 ◽  
Vol 925 ◽  
pp. 436-441
Author(s):  
Sabah Jalal Fathi
Keyword(s):  
Electrical Resistivity ◽  
High Temperature ◽  
Critical Temperature ◽  
Structural Properties ◽  
High Temperature Superconductivity ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Nano Zno ◽  
X Ray ◽  
Tetragonal Type

The electrical resistivity of high temperature superconductivity Tl2-xHgxBa2Ca2Cu3O10-δhas been measured in the temperature range from 90K to 330K. These results showed that the critical temperature of the zero resistivity increases from 127K to 138K ,when the Hg concentration increased from 0 to 0.5. The structure of the Tl2-xHgxBa2Ca2Cu3O10-δcompound has also investigated by using X- ray diffraction technique. This compound has tetragonal type structure with a=b=5.36A & c=36.09A and the magnitude of c-axis increases to 37.8A when x increased to 0.5. Nano ZnO was add to the sample with concentration (0-1) wt% of the ( Tl2-xHgxBa2Ca2Cu3O10-δ) samples mass. The effect of the nano ZnO concentration substitution on the samples investigated on structure and critical temperature of the best sample properties (when x=0.5)and showed that the structure remains tetragonal and c-axis increased to 39.2A when nano sized concentration 0.8% and Tcincrease to 146K but c-axis decreased to 38.4A and Tcdecreased to 143K when the ZnO concentration 1%.

SUPERCONDUCTIVITY IN Bi-Sr-Ca-Mg-Cu-OXIDE

1991 ◽  
Vol 05 (11) ◽  
pp. 771-777 ◽  
Author(s):  
A.Y. KHAN ◽  
M. MOHAMMAD ◽  
M. SHAHNAZ ◽  
S.K. HASNAIN
Keyword(s):  
Magnetic Susceptibility ◽  
Electrical Resistance ◽  
Meissner Effect ◽  
Superconducting Phase ◽  
Partial Substitution ◽  
Nominal Composition ◽  
X Ray Diffraction ◽  
Minor Phase ◽  
X Ray ◽  
A Minor

A Mg -substituted material with nominal composition Bi 2 Sr 2 Ca 3 Mg 2 Cu 6 O x, prepared by partial substitution of Ca by isovalent Mg in the 2256 composition of Bi-Sr-Ca-Cu-O , has been studied by the measurements of electrical resistance, magnetic susceptibility and X-ray diffraction pattern. Results show the existence of a superconducting phase with onset T c at 112.5±1 K along with a minor phase with onset T c =88 K . The material retained superconducting characteristics (Meissner effect and T c onset ) even after a period of six months.

scholarly journals Effect of repeated annealing on the synthetic and electrical properties of Bi2-(x+y)PbxAgy Sr2Ca2Cu3O10+δ electrically superconductor

2019 ◽  
Vol 24 (4) ◽  
pp. 57
Author(s):  
Khalid Hamdi Razzeg ◽  
Abdul Kareem Dahas Ali ◽  
, Chanar Abiden Zaynel
Keyword(s):  
Critical Temperature ◽  
Electrical Properties ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Partial Substitution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Know How ◽  
Substitution Ratio ◽  
Critical Temperature Tc

This research involved the preparation of Bi2-(x+y)PbxAgy Sr2Ca2Cu3O10+δ with different concentrations of (x,y) which are (x=y=0)(x=0.05,y=0.15)(x=y=0.1)(x=0.15,y=0.05) by the method of solid state reaction under hydrostatic pressure of 8 ton /cm2  and at annealing temperature of 1123K in presence of sufficient amount of oxygen. In order to obtain an increase in the regularity of crystalline composite and also to obtain the best critical temperature, the annealing was repeated on these samples at 723K. After X-ray diffraction (XRD) test to know how effective the partial substitution and repeated annealing is, it was obvious that the crystalline composite was of tetragonal type and the best substitution ratio is when (x=0.05,y=0.15) where the values of lattice dimensions were a=b=5.4056°A, c=37.4226°A, after repeating the annealing process on these samples ,the crystalline composite kept its type and with conspicuous increase in the length of c-axis, but the best sample after repeating the annealing was at ratio of (x=y=0.1) where the values of lattice dimensions became a=b=5.4030°A,c=37.5230°A when it was a=b=5.4011°A,c=37.0660°A before repeating the annealing .When the electrical properties of these samples was studied ,we noticed that the oxygen has an important role in increasing the critical temperature and we obtained the best critical temperature Tc=144K and that’s when x=0.05,y=0.15 while after repeating the annealing it was Tc=146K and that’s when x=y=0.1 and it was Tc=136K before repeating the annealin   http://dx.doi.org/10.25130/tjps.24.2019.073  

High temperature X-ray diffraction investigation of an aluminium-silicon-corundum system

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 369-374 ◽  
Author(s):  
D. Garipoli ◽  
P. Bergese ◽  
E. Bontempi ◽  
M. Minicucci ◽  
A. Di Cicco ◽  
...  
Keyword(s):  
High Temperature ◽  
X Ray Diffraction ◽  
X Ray

Fabrication and study the effect of the laser on the properties of the compound Tl2-xHgxBa2-ySryCa2Cu3O10+δ superconductor

2018 ◽  
pp. 168
Author(s):  
A. Kareem Dahash Ali ◽  
Nihad Ali Shafeek
Keyword(s):  
Transition Temperature ◽  
Solid State ◽  
Hydrostatic Pressure ◽  
Electrical Properties ◽  
Co2 Laser ◽  
Temperature Shift ◽  
Unit Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Electrical Properties

This study included the fabrication of    compound (Tl2-xHgxBa2-ySryCa2Cu3O10+δ) in a manner solid state and under hydrostatic pressure ( 8 ton/cm2) and temperature annealing(850°C), and determine the effect of the laser on the structural and electrical properties elements in the compound, and various concentrations of x where (x= 0.1,0.2,0.3 ). Observed by testing the XRD The best ratio of compensation for x is 0.2 as the value of a = b = 5.3899 (A °), c = 36.21 (A °) show that the installation of four-wheel-based type and that the best temperature shift is TC= 142 K  .When you shine a CO2 laser on the models in order to recognize the effect of the laser on these models showed the study of X-ray diffraction of these samples when preparing models with different concentrations of the values ​​of x, the best ratio of compensation is 0.2 which showed an increase in the values ​​of the dimensions of the unit cell a=b = 5.3929 (A °), c = 36.238 (A°). And the best transition temperature after shedding laser is TC=144 K. 

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