Glass-Ceramic Synthesis of Cr-Substituted Strontium Hexaferrite Nanoparticles with Enhanced Coercivity

single-step synthesis of multi-component spirobarbiturates using ionic liquids and synthesis of substituted pyridine filled with catalysts supported on solid substrate

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

Synthesis of new dental nanocomposite with glass nanoparticles

Objective(s): The aim of this study was to synthesis new dental nanocomposites reinforced with fabricated glass nanoparticles and compare two methods for fabrication and investigate the effect of this filler on mechanical properties. Materials and Methods: The glass nanoparticles were produced by wet milling process. The particle size and shape was achieved using PSA and SEM. Glass nanoparticle...

Order-disorder and magnetic exchange interactions in substituted strontium hexaferrite SrAxFe12-xO19(A=Ga, In)

The unusual magnetic behavior of the 1% site in SrGa,Fe12-,Olg (8.3Cu<6.0) and SrInXFc,,_,XO,, (0.3~~~1.4) has been investigated by means of 57Fe Miissbauer spectroscopy at 298 IL The bifurcation of the 12.k MGssbauer subspectrum into 12k, and 12k2 components vf widely differing intensities has been confirmed for both Ga”+ and 18. The bifurcation is apparent at s values as low as 0.3, and the l...

Giant coercivity of dense nanostructured spark plasma sintered barium hexaferrite

STUDY OF THE OPTIMUM CALCINATION TEMPERATURE FOR THE SYNTHESIS OF STRONTIUM HEXAFERRITE MAGNETIC CERAMIC NANOPOWDER BY A SOL-GEL AUTO-COMBUSTION METHOD IN THE PRESENCE OF CATIONIC SURFACTANT

In this research the sol-gel auto-combustion method was used to prepare strontium hexaferrite nanopowder. A solution of distilled water, ferric and strontium nitrates, citric acid, trimethylamine, and n-decyltrimethylammonium bromide cationic surfactant, was heated to form a viscous gel. The gel was heated and then ignited automatically. As-burnt powder was calcined at temperatures from 700 to ...