Iranian Journal of Materials Science and Engineering

• Li₂TiO₃ + xZnO (x = 0, 0.5, 1, 1.5, 2, 3, and 5 mol%) ceramics have been fabricated.
• The Maximum density of 3.33 g/cm³ was obtained in Li₂TiO₃ + 2ZnO ceramic at low sintering temperature of 1100˚C.
• The Rietveld refinement of XRD patterns clearly indicate that the cell volume reduced with Zn addition that may be attributed to vacancy formation in the ceramic.
• Simulated XRD patterns by MAUD software showed that the intensity of 002 diffraction line (2θ~18.5^o) is decreased by Zn incorporation.
• The maximum values of Q × f = 31800 GHz and ε_r = 22.5 were obtained in Li₂TiO₃ + 3ZnO and Li₂TiO₃ + 2ZnO compositions sintered at 1200˚C, respectively. The observed properties are attributed to the microstructural evolution and grain growth (first case) or high density of the obtained ceramic (second case).

• Delamination effect on the vibration characteristics have been studied along with the influence of stacking sequence and boundary constraints.
• Natural frequencies of carbon fiber reinforced polymer composite plate decreased upon an increase of delamination size.
• Highest values of natural frequency is observed for cantilever type (CFFF) boundary condition.

Reduced graphene oxide (RGO) thin films fabricate by spray pyrolysis method.
XRD data show the amorphous nature of these films.
The impact of deposition temperature on the physical properties of RGO were explored.
Data analysis showed a high absorption coefficient for RGO on glass substrates.
The band gap value by increasing temperature varied from 1.67 eV to 1.88 eV.

• Recovery of the high amount of carbon from the tail of anode electrodes.
• Using of the physical and physic-chemical methods for recycling of carbon.

• Formation of a single phase cobalt- doped HAp
• Paramagnetic properties of Co- substituted HAp lattice, as opposed to diamagnetic behavior in pure HAp
• No toxicity and good adherence of MG63 cells onto the Co- substituted substrates
• Nearly twice as much alkaline phosphatase activity in the presence of Co ions.
• An increase in antibacterial activity in Co- doped particles against S. aureus bacteria

• The samples were obtained by solid-state reaction in air between 980 °C and 1020 °C
• We have successfully substituted 10% of the Ru ions in the Ru_0.9M_0.1Sr₂GdCu₂O₈ system
• The absence of superconductivity in these samples can be explained by the Mn and Mo doping