Abstract
Three types of (1−x)(Bi0.85La0.15)FeO3-xPbTiO3 (BLF–PT) compositionally graded ceramics (x = 0.38, 0.40, 0.415 and 0.43) were fabricated using a lamination process based on the non-aqueous tape casting method. Scanning electron microscope images showed that the compositionally graded ceramics possessed dense microstructures without obvious cracks. The dielectric, ferroelectric and piezoelectric properties of the BLF–PT ceramics were sensitive to the composition distributions in the thickness direction. The BLF–PT ceramics with monotonic variation of PT content (in the thickness direction) exhibited the best piezoelectric properties. The tip displacement of compositionally graded piezoelectric ceramics reached up to ∼13.5 μm, which is about ten times higher than that of BLF–PT ceramics with single composition.
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