Phase transitions in Na2TeO4 ceramics |
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| Authors: | N. K. Singh R. N. P. Choudhary |
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| Affiliation: | (1) University Department of Physics, 802 301 Ara, India;(2) Department of Physics and Meteorology, Indian Institute of Technology, 721 302 Kharagpur, India |
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| Abstract: | Polycrystalline samples of NaTeO4 were prepared by conventional solid-state reaction technique at low temperature (600° C). X-ray powder diffraction (XRD) technique was used to check the formation of single phase NaTeO4 compound with cell parametersa = 10·602(1) åb = 70·622(1) å andc = 8·506(1) å in orthorhombic crystal system. Detailed studies of dielectric constant (ε) (and loss tangent (tan δ) as a function of frequency (400 Hz-10 kHz) and temperature (?120°C–260°C) show that the compound has two phase transitions in the ferroelectric phase. |
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| Keywords: | Polycrystalline phase transition ceramics dielectric constant |
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