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Project ID: G5RD-CT-2001-00456
Finanziato nell'ambito di: FP5-GROWTH
Paese: Switzerland

Curved tape cast films

The solid solutions of lead magnesium niobate [Pb(Mg1/3Nb2/3)O3], and lead titanate (PbTiO3) were used for optimisation of the curved tape processing.

The innovative feature of the result was related to the forming of the discs. Tape casting process and forming by uniaxial pressure were used to obtain curved discs with different thickness (50 to 630mm), diameters of 0.5 to 4 cm and radius of curvature between 6 and 10 mm. The range of compositions of (1-x) Pb (Mg1/3Nb2/3)-xPbTiO3 : with x=0.1-0.3-0.35 and 0.6 was investigated, and the processing of piezoelectric layers was optimised in each case.

The results are used for preparation of focused single-element transducer by directly using a curved piezoelectric disk. Moreover, for high frequency medical imaging applications (over 30 MHz), the thickness of the piezoelectric element must be lower than 100 micrometers.

Reported by

Ecole Polytechnique Fédérale de Lausanne
MX-G Ecublens
1015 Lausanne
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