scholarly journals Thermal, Structural and Electrical Properties of Some Bi-Cu-Ni Alloys

2014 ◽  
Vol 59 (1) ◽  
pp. 117-120 ◽  
Author(s):  
B. Marković ◽  
D. Živković ◽  
D. Manasijeyić ◽  
M. Sokić ◽  
D. Minić ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Cross Sections ◽  
Molar Ratio ◽  
High Temperature Application ◽  
Ni Alloys ◽  
Eds Analysis ◽  
Structural And Electrical Properties ◽  
Temperature Application ◽  
Thermal And Electrical Properties ◽  
Free Solder

Abstract The Bi-Cu-Ni ternary system belongs to the group of potential Cu-Ni-based advanced lead-free solder materials for high temperature application. In this study microstructure investigation of the slow-cooled Bi-Cu-Ni samples was done using SEM-EDS analysis. The samples compositions were chosen along three cross-sections with molar ratio Cu:Ni=1:3, 1:1 and 3:1. The experimentally obtained phase structure was compared with the results of thermodynamic calculation according to CALPHAD method. Also, new results regarding thermal and electrical properties investigations of these alloys are presented in this paper, based on DSC and electroconductivity measurements.

scholarly journals Ternary Bi-Cu-Ni alloys – thermodynamics, characterization, mechanical and electrical properties

10.30544/316 ◽  
2017 ◽  
Vol 23 (3) ◽  
pp. 241-254 ◽  
Author(s):  
Branislav Radomir Marković ◽  
Dragan Manasijević ◽  
Nadežda Talijan ◽  
Miroslav Sokić ◽  
Nada Štrbac ◽  
...  
Keyword(s):  
Energy Dispersive Spectrometry ◽  
Molar Ratio ◽  
Lead Free Solder ◽  
High Temperature Application ◽  
Scanning Calorimetry ◽  
Ni Alloys ◽  
Mechanical And Electrical Properties ◽  
General Solution Model ◽  
Temperature Application ◽  
Free Solder

The Bi–Cu–Ni ternary system belongs to the group of potential Cu-Ni-based advanced lead-free solder materials for high temperature application. The paper shows results of the thermodynamic calculations using general solution model along the line with the molar ratio of Cu: Ni = 1:1. The experimental part shows thermal, structural, electrical and mechanical properties based on differential scanning calorimetry (DSC), scanning electron microscopy with energy dispersive spectrometry (SEM-EDS), electroconductivity and hardness measurements of the alloys selected in the section from bismuth corner with molar ratio Cu: Ni = 1:1, Cu: Ni = 3:1, and Cu: Ni = 1:3.

scholarly journals Mesoporous Inorganic Membrane Reactor for Oxidative Coupling of Methane

2017 ◽  
Vol 21 (1) ◽  
pp. 37
Author(s):  
N.C May ◽  
A.R Mohamed ◽  
S Bhatia
Keyword(s):  
Cross Sections ◽  
Oxidative Coupling ◽  
Prolonged Exposure ◽  
Oxidative Coupling Of Methane ◽  
Inorganic Membrane ◽  
High Temperature Application ◽  
Alumina Membrane ◽  
Temperature Application ◽  
Methane Reactions ◽  
Uniform Deposition

The mesoporous inorganic membrane has been developed and characterized for oxidative coupling of methane reactions. In this research, g-alumina membrane was modified with Lanthanum. The membrane has shown thermal stability in prolonged exposure to the high-temperature application of 600-900°C. The results were confirmed by TGA and OCM experimentations. TGA results showed only 2-3% loss from an initial weight that is mainly due to evaporation of water and release of the nitrate compound. The membrane was also found stable for at least a month of operationwhile the catalyst was being regenerated to regain its activity. The SEM cross-sections show successful deposition of Lanthanum in spite of its non-uniform deposition layer and crack formation.

scholarly journals Structural and electrical properties of Ti doped α-Fe2O3

2013 ◽  
Vol 45 (3) ◽  
pp. 281-292 ◽  
Author(s):  
M.V. Nikolic ◽  
D.L. Sekulic ◽  
N. Nikolic ◽  
M.P. Slankamenac ◽  
O.S. Aleksic ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Grain Boundary ◽  
Relaxation Process ◽  
Equivalent Circuit ◽  
Impedance Analysis ◽  
Eds Analysis ◽  
Structural And Electrical Properties ◽  
Ti Doping ◽  
Boundary Contribution

In this work we have analyzed the effects of Ti doping on structural and electrical properties of ?-Fe2O3. When the amount of added Ti (5 wt.%TiO2) was within the solubility degree and XRD, SEM and EDS analysis revealed a homogenous hematite structure, with lattice parameters a= 5.03719(3) ?, c=13.7484(1) ? slightly increased due to incorporation of Ti into the rhombohedral hematite lattice. Higher amounts of Ti (10 wt.%TiO2) resulted in the formation of pseudobrookite, besides hematite, confirmed by SEM and EDS analysis. Studies of electric properties in the temperature range 25-225oC at different frequencies (100 - 1Mz) showed that Ti doping improved electrical conductivity. Impedance analysis was performed using an equivalent circuit, showing one relaxation process and suggesting dominant grain boundary contribution.

Structural and Electrical Properties of Thermally Evaporated SnxSe1-x Thin Films

2011 ◽  
Vol 3 (10) ◽  
pp. 1-4 ◽  
Author(s):  
Bushra A Hasan ◽  
◽  
Ghuson H Mohamed ◽  
Amer A Ramadhan
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Structural And Electrical Properties

Structural, Thermal and Electrical Properties of Doped Poly(3,4 ethylenedioxythiophene)

2016 ◽  
Vol 10 (4) ◽  
pp. 395-400 ◽  
Author(s):  
Deepali Kelkar ◽  
◽  
Ashish Chourasia ◽  
◽  
Keyword(s):  
Crystal Structure ◽  
Electrical Properties ◽  
Xrd Analysis ◽  
Structure Modification ◽  
Camphorsulfonic Acid ◽  
Thermal And Electrical Properties ◽  
Ft Ir

Poly(3,4-ethylenedioxythiophene) (PEDOT) was chemically synthesized, undoped and then re-doped using FeCl3 as well as camphorsulfonic acid (CSA). FT-IR results confirm the nature of the synthesized and doped samples. XRD analysis indicates crystal structure modification after doping and was also used to calculate crystallinity of samples. Crystallinity increases after FeCl3 doping, whereas it reduces due to CSA doping. TGA-DTA results show reduction in Tg value for FeCl3 doped sample while it increases for CSA doped samples compared to that of undoped PEDOT. Reduction in Tg indicates plasticizing effect of FeCl3 whereas increase in Tg show anti-plasticizing effect of CSA in PEDOT. Conductivity value () increases by two orders of magnitude after doping. Log vs. 1/T graph show metallic nature of undoped PEDOT above 308 K, however both doped samples show semiconducting nature from 301 to 383 K.

Sign in / Sign up

Export Citation Format

Share Document