The threedominant scattering mechanisms relevant to all BST polycrystallinesamples are Umklapp phonon-phonon scattering, point defectscattering and boundary scattering
The three<br>dominant scattering mechanisms relevant to all BST polycrystalline<br>samples are Umklapp phonon-phonon scattering, point defect<br>scattering and boundary scattering