Abstract
Polycrystalline sample of Pb 2 Sb 3 DyTi 5 O 18 , a member of tungsten-bronze (TB) family, was prepared using a high temperature solid-state reaction technique. XRD analysis indicated the formation of a single-phase orthorhombic structure. The dielectric studies revealed the diffuse phase transition and the transition temperature found to be at 301°C. The activation energy was estimated to be 0.62 eV from the temperature variation of dc conductivity. The nature of variation of dc conductivity with temperature suggested NTCR behaviour.
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