Sol-gel processed highly (100)-textured (K,Na)NbO3-based lead-free thin films: Effect of pyrolysis temperature |
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Authors: | Su-Wei Zhang Jin Luo Zhen Zhou Jing-Feng Li |
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Affiliation: | School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, China |
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Abstract: | Recently, lead-free piezoelectric thin films have received increasing attention due to the growing demands for mircoelectromechanical systems and the significant progress in lead-free piezoelectric research. Here, potassium sodium niobate (K, Na)NbO3 (KNN)]-based thin films were fabricated via a sol-gel method. The effects of pyrolysis temperature on the resulting microstructure and electrical properties of KNN-based films were investigated. The KNN-based film pyrolyzed at 550°C and annealed at 700°C shows a dominant (100) orientation with a high texturing degree of 91.7%. The microstructures, morphologies, piezo- and ferroelectric properties of the KNN-based films were discussed in association with different pyrolysis temperatures. The crystallization mechanism of the (100) textured KNN-based thin films was elaborated in detail. |
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Keywords: | lead-free niobium oxides orientation/texturing piezoelectric materials/properties thin films |
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