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A new form of MgTa2O6 obtained by the molten salt method

Research output: Contribution to journalArticle

Author(s)

  • A K Ganguli
  • S Nangia
  • M Thirumal
  • P L Gai

Department/unit(s)

Publication details

JournalPROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES
DatePublished - Jan 2006
Issue number1
Volume118
Number of pages6
Pages (from-to)37-42
Original languageEnglish

Abstract

Using molten salt route (with NaCl/KCl as the salt) we have been able to synthesize a new form of magnesium tantalate at 850 degrees C. Powder X-ray diffraction data could be indexed on an orthorhombic unit cell with lattice parameters, 'a' = 15-36(1) angstrom, 'b' = 13-38(1) angstrom and 'c' = 12.10(1) angstrom. 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 similar to 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 degrees C).

    Research areas

  • MgTa2O6, molten salt method, high resolution transmission electron microscopy, dielectric properties, LOW DIELECTRIC LOSS, MICROWAVE-FREQUENCIES, CERAMICS, OXIDES

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