Improved transmittance and ferroelectric properties realized in KNN ceramics via SAN modification |
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| Authors: | Xumei Zhao Qizhen Chai Bi Chen Xiaolian Chao Zupei Yang |
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| Affiliation: | Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Shaanxi, China |
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| Abstract: | Transparent, Sr(Al0.5Nb0.5)O3‐modified K0.5Na0.5NbO3 (KNN) ceramics were successfully fabricated by a solid‐state pressureless sintering method in this work. The obtained microstructure, transmittance, and electrical properties were characterized in detail. Our results indicated that the modification by Sr(Al0.5Nb0.5)O3 significantly limited the grain growth behavior of KNN, resulting in dense ceramics with submicron grain size (<0.5 μm) and small pore size. Consequently, the ceramic with the 0.96K0.5Na0.5NbO3‐0.04Sr(Al0.5Nb0.5)O3 composition showed superior transmittance and electrical properties: T = 55% in the visible region (0.78 μm), d33 = 105 pC/N, εr = 1021, and Pr = 15.1 μC/cm2, which were significantly higher than those of pure KNN. Our findings implied that the addition of Sr(Al0.5Nb0.5)O3 could be a good strategy to obtain superior transmittance and electrical properties in KNN and may shed light on other ferroelectric systems. |
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| Keywords: | grain growth control K0 5Na0 5NbO3 piezoelectric solid‐state pressureless sintering method transmittance |
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