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Due to the water solubility of Magnesia-Chrome bricks, the hexavalent chromium ion (Cr 6+) present in these bricks has been reported for use from rotary cement kilns. Magnesia-Chrome bricks are being replaced with chrome-free brick mainly of magnesia-spinel type. So, the aim of the present study is to develop new Cr-free brick with the addition of TiO 2. All of properties such as bulk density, apparent porosity, cold crashing strength, modulus of rupture strength, hot modulus of rupture strength and refractoriness under load are measured on the basis of Japanese Industrial Standards (JIS). Also, the coating test and corrosion resistance were carried out against raw cement meal. Microstructural analysis and phase identification had been done by scanning electron microscopy, which is equipped with an energy dispersive X-ray analysis (SEM/EDS), also, mineral phases present in the sample were determined by using X-Ray diffraction. According to the result spinel phases such as magnesiaaluminate and magnesia-titanate as a main phase is formed as well as other lateral phases which have promoted the properties and microstructure.

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-This project involves development and characterization of nanocomposite of functionalized graphene oxide with multi coreshell Fe3O4-ZnO-TiO2 nanoparticles (abbreviated as G-MCSN) with enhanced multi-functional properties. The multi core-shell nanoparticles consist of superparamagnetic core with modified shells of photocatalytic materials. After synthesis of Fe3O4 nanoparticles (using co-precipitation and solvothermal processes), it was coated with multi shells of ZnO and TiO2 (via a facile sol-gel rout). Functionalized graphene oxide was synthesized and mixed with multi core-shell nanoparticles to prepare the nanocomposite. The phases and morphology of the core-shell nanoparticles and the nanocomposite were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE/SEM) and transmission electron microscopy (TEM/SAED). The magnetization hysteresis curves of the samples were conducted by a vibrating sample magnetometer (VSM). The results showed that the average size of synthesized magnetite nanoparticles were less than 20 nm. The précised control of the procedure resulted in the formation of core-shell structure after coating with ZnO and TiO2. The median size of core-shell nanoparticles was less than 50 nm. TEM studies revealed the formation of a few layers functionalized graphene oxide (FGO), as well as core-shell nanoparticles. Vibrating sample magnetometer measurement showed that magnetic property of the core-shell nanoparticles was lower than the bare Fe3O4 nanoparticles (from 40.96 emu.g -1 in bare Fe3O4 nanoparticles to 20.13 and 12.98 emu.g -1 in core-shell nanoparticles). But, when nanocomposite was made (FGO with core-shell nanoparticles), magnetic property was increased in comparison with the coreshell nanoparticles from 12.98 emu.g -1 to 28.18 emu.g -1 .

Porous ceramic materials have found widespread technological and industrial applications from filtration, absorption, catalysts and catalyst supports to lightweight structural components. In the present work, processing is based on the generation of foam from an aqueous suspension of ceramic powder and the subsequent stabilization of the structure by in-situ polymerization of organic monomers. The process offers a number of advantages from other processes. It is shown here, the in-situ polymerization of organic monomers led to a fast solidification and strong, porous bodies. SEM results showed, that the ceramic foams had highly interconnected network of spherical cells with low densities. The cell size distribution was dependent on the density of the samples as well as the polymerization onset time. Good correlations were found between the green microstructure, rheology of the suspensions and the particle interaction forces.