Synthesis of Nano-Crystalline Magnesium Chromate Spinel by Citrate Sol-Gel Method
Nanocrystalline MgCr2O4 with a crystal size of about 20nm is synthesized by citrate sol-gel process, which is characterized by X-ray diffraction (XRD), thermogravimetry coupled with differential thermal analysis (TG-DTA) and field emission scanning electron microscopy (FE-SEM). The initial crystallization temperature of MgCr2O4 spinel was at about 550°C, whereas that of the fully crystallized magnesium chromate spinel appeared at about 600°C. The crystal grain size increases with the annealing temperature and holding time.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
S. P. Li et al., "Synthesis of Nano-Crystalline Magnesium Chromate Spinel by Citrate Sol-Gel Method", Advanced Materials Research, Vols. 284-286, pp. 730-733, 2011