Abstract
With the development of environmental protection and the integration of various materials, multifunctional ceramics have caught significant attention. In this paper, KNNS-xDy ((K0.48Na0.52) (Nb0.95Sb0.05) O3-xDy2O3) ceramics with luminescent and piezoelectric properties were synthesized via conventional high-temperature solid-state method. It was found that the KNNS ceramics doped with the content of 0.4 %Dy had the optimal comprehensive properties and possessed typical characteristics of relaxant ferroelectrics. Particularly, a special thermal quenching phenomenon appeared in the KNNS-0.4 %Dy ceramics and the emission intensity increased by about 15 % after the sample was heated from room temperature up to 75℃. The results showed that the luminescence properties of ferroelectric materials were closely related to the phase structure. The influence of ferroelectric structure on luminescence intensity of materials will be a new research approach in the future.
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