Evidence of ferroelastic–ferroelastic phase transition in $BiMoxW1−xO6$ compounds Available to Purchase

Through mechanoelastic, thermal expansion, and dielectric measurements as a function of the temperature on ceramics of $BiMoxW1−xO6$ $(x=0,$ 0.10, and 0.25) solid solutions, anomalies in the corresponding parameters are found below the ferroparaelectric phase transition temperature. One of these anomalies, that corresponding to the temperature close to 940 K, contains mechanoelastic features that strongly suggest that we are dealing with a ferroelastic–ferroelastic phase transition. The behavior of thermal expansion and dielectric constant suggests that this phase transition scarcely affects the macroscopic ferroelectric properties in that temperature range. The origin of the proposed ferroelastic–ferroelastic phase transition could be attributed to the tilting of $BO6$ octahedra.