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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/961

Title: New double perovskites having low dielectric loss:LaBaZnTaO6, LaSrZnNbO6, and Ba2Zn0.5Ti0.5TaO6
Authors: Ganguli, A K
Grover, V
Thirumal, M
Keywords: Oxides
Electronic materials
X-ray diffraction
Issue Date: 2001
Citation: Materials Research Bulletin, 36(11), 1967–1975
Abstract: Oxides of the type LaBaZnTaO6 and LaSrZnNbO6 have been synthesized by the solid-state method at 1100°C. Ba2Zn0.5Ti0.5TaO6 was synthesized by the molten salt method (using NaCl–KCl as flux), the solid-state method yielding a biphasic mixture of BaTiO3 and BaZn1/3Ta2/3O3. LaBaZnTaO6 and LaSrZnNbO6 were found to crystallize in an ordered (cubic) double perovskite structure in the Fm3m space group with a 5 8.0867(8) and 8.001(1) Å, respectively. Ba2Zn0.5Ti0.5TaO6 crystallizes in the disordered cubic perovskite structure with a 5 4.054(1) Å. These oxides have very low dielectric losses in the region of 0.0005 to 0.003 (500 kHz). The dielectric constants of LaBaZnTaO6 and LaSrZnNbO6 are low (13 and 10, respectively) while Ba2Zn0.5Ti0.5TaO6 has a high dielectric constant of 36 at 500 kHz.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/961
Appears in Collections:Chemistry

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