Abstract
A new lead-free tungsten bronze (TKWB) type relaxor derived from Ba 1− x Sr x Nb 2O 6 and containing Sn was prepared via classical solid state route. A 2.5% Sn:Nb ratio was enough to both induce the relaxor effect and bring the transition temperature close to room temperature. Promising dielectric characteristics were evidenced, in particular when compared to perovskite-type lead-free relaxors. Chemical bonding arguments are used to explain the role of tin in the structure-dielectric properties relationships.
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