High-Temperature Elastic Properties of Yttrium-Doped Barium Zirconate

The elastic properties of 0, 10, 15, and 20 mol% yttrium-doped barium zirconate (BZY0, BZY10, BZY15, BZY20) at the operating temperatures protonic ceramic fuel cells were evaluated. proposed measurement method for low sinterability materials could accurately determine sonic velocities small-pellet-type samples, determined based on these velocities. Young’s modulus BZY20 was 224, 218, 209 GPa °C, respectively, values decreased as yttrium concentration increased. At high (>20 °C), temperature increased, shear moduli decreased, whereas bulk Poisson’s ratio varied nonlinearly with temperature: rapidly from 100 to 300 °C gradually beyond 400 °C. 137, 159, 122 500 30–40% smaller than influence larger that change in concentration.