A new form of MgTa2O6 obtained by the molten salt method

Journal of Chemical Sciences

Shikha Nangia²  Ashok K Ganguli1²  A Meganathan Thirumala²  Pratibha L Gai¹ 

[1] DuPont, Central Research and Development, Wilmington, DE 19880-0356 and University of Delaware, Newark, Delaware, 19716, USA$$;Department of Chemistry, Indian Institute of Technology, New Delhi 110 016$$

关键词: MgTa2O6;    molten salt method;    high resolution transmission electron microscopy;    dielectric properties.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Using molten salt route (with NaCl/KCl as the salt) we have been able to synthesize a new form of magnesium tantalate at 850°C. Powder X-ray diffraction data could be indexed on an orthorhombic unit cell with lattice parameters, `𝑎' = 15.36(1) Å, ‘𝑏’ = 13.38(1) Å and ‘𝑐’ = 12.10(1) Å. High resolution transmission electron microscopy and electron diffraction studies confirm the results obtained by X-ray studies. Energy dispersive X-ray spectroscopy helps ascertain the composition of MgTa2O6. The title compound shows a dielectric constant of ∼ 24 with a low dielectric loss of 0.006 at 100 kHz at room temperature. Dielectric constant is nearly unchanged with rise in temperature while the loss shows a very marginal increase (0.007 at 300°C).

【 授权许可】

Unknown