Diffuse ferroelectric phase transition in Li₂Pb₂Dy₂W₂Ti₄V₄O₃₀

Abstract

Tungsten–bronze polycrystalline ceramic Li₂Pb₂Dy₂W₂Ti₄V₄O₃₀ was prepared by mixed-oxide method. The preparation conditions were optimized by thermogravimetry analysis and repeated firing. Room-temperature structural analysis confirms the formation of the compound in single phase (orthorhombic). Studies of dielectric parameters () of the compound with temperature at different frequencies suggest the existence of phase transition in the compound. The existence of ferroelectric property (based on dielectric anomaly) of the material was confirmed by polarization study.

Keywords:

• ceramics
• ferroelectrics
• solid state reaction
• dielectric response
• XRD