Abstract
To meet the requirement for capacitors with low loss and stable dielectric constant in the intermediate temperature range, (1 − x)Na0.5Bi0.5TiO3–xSrTiO3 (x = 0.2, 0.3, 0.4, 0.5) ceramics have been synthesized by conventional solid-state reaction. Dielectric measurements showed double-shoulder dielectric peaks for the ceramics, with the ceramic having x = 0.3 showing the most stable behavior. Furthermore, Er2O3 was doped into the 0.7Na0.5Bi0.5TiO3–0.3SrTiO3 ceramic at content of 0.02 mol.% to 0.10 mol.%. The results show that Er doping can widen the flat temperature range and decrease the dielectric constant. The ceramic doped with 0.75 mol.% Er2O3 showed the widest temperature range of 50°C to 260°C in a dielectric constant window of <±5% around 2420 with loss <0.02. Ceramics in the 0.7Na0.5Bi0.5TiO3–0.3SrTiO3 system are therefore attractive dielectrics for use in applications at intermediate temperatures.
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This work was supported by the National Natural Science Foundation of China (Grant No. 51472078).
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Cao, W.Q., Fang, F., Ismail, M.M. et al. Stable Dielectric Properties in the Intermediate Temperature Range of 50°C to 260°C for Na0.5Bi0.5TiO3-SrTiO3 Ceramics with Er2O3 Doping. J. Electron. Mater. 46, 6023–6028 (2017). https://doi.org/10.1007/s11664-017-5566-x
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DOI: https://doi.org/10.1007/s11664-017-5566-x