LAUSR

Abstract It is widely reported that rare-earth ions could be used to probe the phase structure by photoluminescence (PL) spectra after doping into ferroelectrics, while most reported results are qualitative. In this work, we show that PL spectra of Eu3+ ions could be used to do quantitative phase analyses of (Na1-x,Kx)0.5Bi0.497Eu0.003TiO3 (NKBT: Eu) ferroelectric ceramics with compositions near morphotropic phase boundary(MPB). The mechanism was elaborated based on the emission intensity ratios of the “hypersensitive” transition to the magnetic dipole transition with the Judd-Ofelt theory. The results were further confirmed by X-Ray Diffraction Rietveld refinements. This work shows a simple yet practical method for quantitative phase analyses for NKBT: Eu ceramics near MPB, and the method is expected to be applied in more ferroelectric material systems.