Repozytorium publikacji - Politechnika Gdańska

In this report, the high-temperature transport properties of (Dy1−xCax)(Zr0.2Hf0.2Sn0.2Ti0.2Ge0.2)O7 pyrochlore oxides with x = 0, 0.05, and 0.1 are studied in dry and humid air. The phase composition and crystal structure were determined by using x-ray and neutron diffraction. The addition of calcium to the structure caused an increase in the concentration of oxygen vacancies, indicating an ionic charge compensation mechanism. Electrical studies allowed us to determine the total electrical conductivity as a function of the synthesis atmosphere and pH2O. The electrical conductivity turned out to be at the level of ∼10−3 S/cm at 800 °C, and only a slight effect of the presence of protonic defects in the structure on the total electrical conductivity was observed. In general, the samples had a low electrical conductivity with a relatively high activation energy of conduction.

Autorzy

• dr inż. Tadeusz Miruszewski link otwiera się w nowej karcie ,
• Florianne Vayer,
• Daniel Jaworski link otwiera się w nowej karcie ,
• David Berardan,
• Claudia Decorse,
• dr hab. inż. Beata Bochentyn link otwiera się w nowej karcie ,
• Denis Sheptyakov,
• prof. dr hab. inż. Maria Gazda link otwiera się w nowej karcie ,
• Nita Dragoe