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Investigation of La3+ Doping Effect on Piezoelectric Coefficients of BLT Ceramics

Wodecka-Dus B., Kozielski L., Erhart J., Pawełczyk M., Radoszewska D., Adamczyk M., Bochenek D.

Archives of Metallurgy and Materials

2017

Vol. 62, iss. 2A

691--696

Effects of La3+ admixture in barium lanthanum titanate (BLT) ceramics system with colossal permittivity on performance of prospective piezoelectric cold plasma application were studied. Usage of cold atmospheric pressure plasma appears promising in terms of industrial and healthcare applications. Performed investigation provide consistent evaluation of doping lanthanum amount on piezoelectric coefficients values with simultaneous capability of charge accumulation for effective plasma generation. Modification of ferroelectric materials with heterovalent ions, however with the lower radii than the original atoms, significantly affects their domain mobility and consequently electromechanical properties. To determine the piezoelectric coefficients, the resonanceantiresonance method was implemented, and values of piezoelectric and dielectric parameters were recorded. Finally the results indicated that addition of 0.4 mol.% of La3+ ions to the ceramic structure maximally increased the values of piezoelectric coefficient to d33 = 20 pC/N and to huge dielectric constant to ε33 T = 29277.

Measurement of elements of the matrix of piezoelectric coefficients in a ferroelectric single crystal

Breczko T., Lempaszek A.

Technical Sciences / University of Warmia and Mazury in Olsztyn

2004

nr 7

183-189

The paper presents a procedure of measurement of piezoelectric coefficients in a ferroelectric single crystal, on the example of Gd2(MnO4)3, using an X-ray diffractometer.

Przedstawiono procedurę pomiaru, z wykorzystaniem dyfraktometru rentgenowskiego, współczynników piezoelektrycznych monokryształu ferroelektrycznego na przykładzie molibdenku gadolinu Gd2(MoO4)3.