Li‐, Sb‐ and Ta‐modified (K,Na)NbO3 nanopowder prepared via a water‐based sol–gel method |
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Authors: | Jian Fang Xiaohui Wang Longtu Li |
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Affiliation: | State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China |
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Abstract: | Stable Li‐, Sb‐ and Ta‐modified (K, Na)NbO3 (LTS‐KNN) sol and gel were successfully prepared via an economical water‐based sol–gel method. Simultaneous thermogravimetry and differential scanning calorimetry (TG‐DSC) and X‐ray diffraction showed that organic compounds were eliminated and a pure perovskite phase formed around 600 °C. Transmission electron microscopy showed that the LTS‐KNN particle size was in the range of 11–34 nm after decomposition at 600 °C. Moreover, high performance LTS‐KNN ceramic was successfully prepared at a low sintering temperature of 1000 °C by use of the nanopowder, and its room‐temperature d33, Kp, K and loss are 311 pC/N, 46.8%, 1545 and 0.024, respectively. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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Keywords: | (K, Na)NbO3 sol− gel synthesis nanopowders ceramics piezoelectric properties |
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