Wyniki wyszukiwania - BazTech

Ograniczanie wyników

3 Archives of Metallurgy and Materials

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Influence of Sr2+ Dopant on Microstructure and Electric Properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) Ceramics

Radoszewska D., Goryczka T., Adamczyk M., Wodecka-Duś B., Bochenek D., Kozielski L.

Archives of Metallurgy and Materials

2018

Vol. 63, iss. 3

1295--1302

The discovery of (BaxCa1-x)(ZryTi 1-x)O3 lead-free ceramics drawn a lot of attention to those novel materials because of their excellent piezoelectric properties. However, quite a little attention has been paid to other features of the material. This article reports a wide range of research, including composition, structure and microstructure, dielectric response and impedance spectroscopy in order to systematize and expand knowledge about this peculiar ceramics and strontium doping effect on its properties. In order to test that influence a series of samples with various strontium concentration, precisely the admixtures of 0.02, 0.04 and 0.06 mol% were prepared, as well as basic ceramics to compare obtained results.

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.

The Technology and Structural Properties of Special Glass Modified (Ba0.6Pb0.4)TiO3 Ceramics

Wodecka-Dus B., Adamczyk M., Goryczka T., Dzik J., Radoszewska D., Kozielski L., Bochenek D.

Archives of Metallurgy and Materials

2016

Vol. 61, iss. 4

1761--1766

The present paper widely describes the details of technology of (Ba0.6Pb0.4)TiO3 ceramics modified with PbO-B2O3-Al2O3-WO3 special glass, as well as the influence of admixture on the microstructure and crystal structure of basic material. The microstructure investigations reveal the significant increase of grain size and a decrease of pores participation in volume of modified samples, whereas the X-Ray Diffraction (XRD) measurements show a decrease of the volume of unit cell. The obtained results are discussed due to processes occurring during the sintering process at high temperature.