International Journal of Advanced Research in

Science and Technology (IJARST)


Synthesis, Microstructural and Thermal analysis of inverse spinel compound Mg2TiO4

Alok Kumar Singh, T. D. Senguttuvan and Azher M. Siddiqui*

A B S T R A C T

In the present work, the influence of mechanical activation on Mg2TiO4 has been studied. High-energy wet ball-mill and post-anneal processing were applied to synthesize Mg2TiO4 single phase crystalline material. The mixture of Mg(NO3)2.6H2O and TiO2 were mechanically activated for 10, 15, 24 and 48 hours in a planetary ball mill and sintered at 13000C for 72 hours. Phase composition, morphological changes and thermal stability of the sample have been analyzed. The thermal analysis of Magnesium Ortho Titanate reveals the exothermic reaction to the abrupt change in two steps.


I N T R O D U C T I O N

Ceramic materials which are based on binary magnesium titanates (MgTiO3 and Mg2TiO4) can be applied in microwave (MW) engineering [1]. Recent development of microwave communication systems requires materials that can be used at microwave frequencies as oscillators in radar detectors and global positioning satellite devices [2, 3]. Spinels are very attractive minerals for material research and engineering applications. Among the variety of the structural categories of oxides, the spinel, generally denoted by the chemical formula AB2O4, has been one of the most familiar structures along with the well-known perovskite. Three stable phases of magnesium titnates (Mg2TiO4, MgTiO3, and MgTi2O5) have been reported in literature [4, 5]. It has been established that MgTiO3 possesses ilmenite structure; MgTi2O5 has pseudobrookite structure and Mg2TiO4 has an inverse spinel structure (space group Fd3m and Z=8) [5, 6]. The magnesium Ortho titanate has the structural formula (Mg2+)[Mg2+Ti4+]O4. In this compound half of the magnesium ion lies in the tetrahedral sites and the other half together with titanium occupy octahedral positions [7, 8].



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