Ambient-temperature formation of metal titanates from ilmenite (FeTiO3)

2019-10-24 17:39:55

Metal formation earth ilmenite titanates

责任者: Welham, N.J. 单位: Dept. of Electron. Mater. Eng., Australian Nat. Univ., Canberra, ACT, Australia 来源出处: Journal of Materials Science(J. Mater. Sci. (UK)),1998/04/01,33(7):1795-9 摘要: Alkaline earth metal titanates are an important material in many industrial areas, from dielectric capacitors to ceramics. The present methods of production rely upon purification of the oxides prior to formation. This paper outlines the formation of pure and mixed metal titanates directly from metal oxides and a natural starting material, in the form of the mineral ilmenite (FeTiO3). The reaction is induced by mechanical activation in a laboratory-scale ball mill and is essentially complete within 50 h for all samples, forming a nanocrystalline titanate and an unidentified iron compound. Annealing studies show that the titanate is formed during milling and can be crystallized at 800°C. Additionally, the reaction process increases the solubility and separation of iron and titanium from ilmenite and this may have application in the formation of titanium compounds from solution 关键词: alkaline earth compounds;ceramics;crystallisation;powder technology;ambient-temperature formation;metal titanates;ilmenite;FeTiO3;alkaline earth metal titanates;mechanical activation;laboratory-scale ball mill;nanocrystalline titanate;reaction process;solubility;800 C;50 h