Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16323
Title: Preparation and characterization of hafnium doped barium titanate ceramics
Authors: Tian, HY
Wang, Y 
Miao, J
Chan, HLW 
Choy, CL 
Keywords: Piezoelectric property
Solid-state reaction
Thermal analysis
X-ray diffraction
Issue Date: 2007
Publisher: Elsevier
Source: Journal of alloys and compounds, 2007, v. 431, no. 1-2, p. 197-202 How to cite?
Journal: Journal of alloys and compounds 
Abstract: BaHfxTi1-xO3 powders and ceramics with x varying from 0 to 0.15 were prepared via a solid-state reaction technique. Probable reaction pathways were elucidated by employing simultaneous thermogravimetry analysis and differential scanning calorimetry (TGA and DSC). Phase variations in compounds were analyzed by X-ray diffraction (XRD). The microstructures and composition of the powders and ceramics were measured and confirmed by SEM images and EDX spectra. Dielectric properties and piezoelectric properties were investigated. The results suggested that the three transitions in BaTiO3 were pinched by substituting titanium with hafnium and the Curie temperatures decreased as the hafnium content rose in the compounds. A high piezoelectric parameter (d33 ∼ 305 pC/N) was obtained between the orthorhombic and rhombohedral phases.
URI: http://hdl.handle.net/10397/16323
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2006.05.037
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