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- Title
Structure and piezoelectric properties of KNaNbO-AlFeO lead-free ceramics by using AlFeO as a sintering aid.
- Authors
Ling, Peng; Minhong, Jiang; Zhengfei, Gu; Gang, Cheng; Lei, Ma; Yusong, Du; Xiaofei, Wu; Guanghui, Rao; Yongxiang, Li
- Abstract
The (1 − x)KNaNbO- xAlFeO ((1 − x)KNN- xAF) ( x = 0.01-0.08) lead-free piezoelectric ceramics were prepared at low temperature of 1,000 °C by conventional ceramic processing. And AF was used as a sintering aid in order to improve the sintering behavior of KNN. The effect of AF addition on the microstructure, dielectric and piezoelectric properties of the ceramics have been investigated. The results indicate that a small amount of AF can improve the sintering performance and piezoelectric properties of the ceramics effectively. The KNN-AF ceramics for x = 0.03 show the best piezoelectric properties: d = 116 pC/N, k = 32.9 %, Q = 114.8, T = 382 °C, P = 21.8 μC/cm. This also indicates that (1 − x)KNN- xAF ceramics are a promising lead-free piezoelectric candidate material because of its good properties, low-temperature sintering characteristics and plenty of AlO and FeO resources with low cost.
- Subjects
CRYSTAL structure; PIEZOELECTRICITY; POTASSIUM compounds; ALUMINUM compounds; LEAD-free ceramics; PIEZOELECTRIC ceramics; SINTERING; TEMPERATURE effect
- Publication
Journal of Materials Science: Materials in Electronics, 2014, Vol 25, Issue 1, p323
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-013-1589-0