Studies on Properties of Ag\Al 2 O 3 Nanocomposite Synthesized by Solution Combustion Technique Under Novel Condition

Abstract Ag\Al 2 O 3 nanocomposite were synthesized by solution combustion Technique using ammonium carbonate as a new fuel under simultaneous combustion of alumina and silver particles condition. Samples prepared with different amount of silver, were characterized by XRD, BET, SEM and optical Absorption measurements. XRD analysis was used to determine the change in phase and size of the synthesized nanoparticle with adding silver. BET analysis showed that added silver reduced specific surface but which is still suitable for catalytic application. BJH analysis showed that pores in Ag/Al 2 O 3 nano composite are mesoporous and in Al2O3 nano particles is microporous. TEM and SEM showed that silver was distributed completely homogenously in pores of Alumina, and didn't change in surface of Alumina. Optical transmission showed the different existence of different Ag species. JNS All rights reserved Article history

<span style="font-size:10.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-US">Effect of crucible shape on the solution hydrodynamic in the growth of KTiOPO₄single crystals by top-seeded solution growth method: A numerical analysis</span>

675-680Three-dimensional solution flow and temperature field simulations were performed to model the growth of KTiOPO4 single crystals by TSSG method. Steady flow and temperature field for four crucible shapes were computed using finite volume method. Our results show the effect of crucible shape on axial flow which has direct effect on homogeneity of solution, morphology of crystal and mass transport during the growth of crystals from solution. In order to consider the simulation results, KTiOPO4 single crystals were grown by TSSG method in crucibles with different shapes. </span