Iranian Journal of Materials Science and Engineering

• The solid polymer electrolyte films for Pure PVB and 70PVB+30NaNO₃+wt%Fe₂O₃ were prepared using a solution casting technique.
• XRD, FTIR, and SEM are used for amorphousness, complex formation, and surface morphology studies of polymer electrolytes.
• PVB+NaNO₃+Fe₂O₃ (70:30:3%) film exhibits the highest conductivity (2.51×10⁻⁵ S cm^-1).
• Wagner’s polarization technique, can be employed to measure the ionic and electronic transport numbers of all prepared samples.
• The Open Circuit Voltage (OCV) of 2.0V and a Short Circuit Current (SCC) of 0.8 mA were found in the discharge characteristics data for the cell constructed with the polymer electrolyte sample.

 

HIGHLIGHTS:
1 - The hyperbolic sine model provided the most accurate fit for hot compression flow data.
2 - Activation energy for deformation was calculated as 293.37 KJ/mol using Arrhenius equations.
3 - Recrystallization fraction increased with temperature and decreased with strain rate.
4 - Grain sizes at 950, 1050, and 1150 ℃ were measured as 17.7 µm, 28.7 µm, and 31.3 µm.
5 - More uniform grain size distribution was observed with increasing deformation temperature.
6 - The Avrami exponent was measured around 2, indicating nucleation at grain boundaries.


 

Both when the p-n junction is under the influence of strong microwave field and without the influence of strong microwave field, the differential resistance increases with the increase in the value of the coefficient of non-ideality of the p-n-junction I-V characteristics.
Both when the p-n junction is under the influence of strong microwave field and without the influence of strong microwave field, the diffusion capacity decreases as the value of the non-ideality coefficient of the p-n junction I-V characteristics increases.
Both when the p-n-junction is under the influence of strong microwave field and without the influence of strong microwave field, the differential conductance decreases as the value of the non-ideality coefficient of the p-n-junction I-V characteristics.

 

Highlights:
-Addition of various amounts of graphite to celestite powder
- Milling the mixture of celestite and graphite for different durations
- Roasting the mixture to form strontium sulfide
- Dissolution of strontium sulfide in hot water and filtering the residue
- Addition of sodium carbonate to the solution to precipitate strontium carbonate
- Study of the purity and efficiency rate of the process
 

Highlight
•    Lanthanum-doped strontium titanate photocatalysts were made by coprecipitation method
•    The enhanced specific surface area and narrowed bandgap due to lanthanum doping
•    An improved photocatalytic performance for the photodegradation of methylene blue

 

•    Ni-Co/SiC-CeO2 composite coating was prepared on a copper substrate using the pulse electrodeposition method.
•    Higher current densities (0.1, 0.2, 0.3 A/cm²) lead to an increase in microhardness as a result of grain refinement.
•    Increasing the duty cycles (10, 20, 30 %) leads to a decrease in microhardness due to lower nanoparticle concentration.
•    Higher duty cycles result in a reduction in corrosion resistance, as they mimic a DC state.
•    Higher frequencies (10, 100, 1000 Hz) improve both microhardness and corrosion resistance.


 

•    This study examined the crystallization behaviors of PVC hybrid biocomposites using sea shell wastes (SS) as reinforcement materials and graphene derivatives (GO and RGO) as fillers.
•    The addition of 20 wt% SS can significantly enhance PVC's structural, thermal and mechanical characteristics.
•    RGO and SS offers a very stable supporting effect and it can be improve of the many more properties of PVC due to the excellent compatibility between the PVC-RGO-SS.


 

Highlights
•    Bi2O3 thin films were synthesized via low-cost method of dip coating.
•    The maximum average transmission in the visible region was about 78%.
•    β-tetragonal phase was dominant for all Bi2O3
•    All films show hydrophilic surface with a contact angle between 45.57 and 67.14°.
•    0.1M achieved high photocatalytic efficiency of 99.9%.