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Texturing of lead free piezoelectric ceramics

Authors: Brennhaugen, Dehlia Eide;

Texturing of lead free piezoelectric ceramics

Abstract

Texturing of the lead-free system Ba0.92Ca0.08TiO3 (BCT) was investigated focusing on density, degree of texture and piezoelectric response. BCT templates were prepared in a two-step molten salt synthesis to achieve the anisotropic growth needed for the template morphology. Ba6Ti17O40 (B6T17) templates were synthesised, and then converted to BCT through a topotactic conversion process. BCT templates with a 20-50 µm diameter range and a 2-20 aspect ratio were obtained. The templates had a Lotgering factor F111=59.4%.Textured samples were prepared by tape casting and templated grain growth. As a reference, non-textured samples were prepared, and analysed together with the textured samples. A sintered BCT laminate, with a density of 93.4%, reached a texture degree of 42.7%. The highest measured direct and converse piezoelectric coefficients were d33=49±3 pCN-1 and d33= 140 pmV-1 respectively. Textured materials showed an increase in piezoelectric response compared to the non-textured materials. As many samples had a weak ferroelectric response, the foundation for comparing the effects of texture was somewhat impaired. This was probably caused by a combination of the low density and impurities in the samples. However, promising results with regard to enhancing piezoelectric response by texturing was observed and should be further investigated, focusing on achieving higher densities and thus higher degrees of texture in the ceramic.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green