Temperature stability and electrical properties of Tm 2 O 3 doped KNN-based ceramics
作者： Yuzhi Zhai , Juan Du , Chong Chen , Jigong Hao , Peng Fu
DOI: 10.1007/S10854-019-00765-8
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摘要: For green development concern, lead-free piezoelectric ceramics 0.96(K0.48Na0.52)Nb0.96Sb0.04O3–0.04Bi0.5(Na0.82K0.18)0.5ZrO3–xmol%Tm2O3 fabricated via conventional solid state method are studied. The analyses of X-ray diffraction and Raman dates show the coexistence phase orthorhombic–tetragonal. Meanwhile, tetragonal fraction increases with increasing Tm contents. Both Cure temperature responding maximum permittivity decline x. At same time, there diffuse transition relaxation-like phenomena after doping Tm. activation energy, obtained from Arrhenius equation, suggests that is a mixed conduction mechanism by both single-ionized doubly oxygen vacancy diffusion. stabilities remnant polarization unipolar strain significantly improved in range 30–150 °C. Rare earth element useful for improving stability KNN-based ceramics.
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