Figure 4

Raman spectra of BaZr1-xHoxO3-δ ceramics for x = 0, 0.05, 0.10, 0.15, and 0.20 sintered at 1600 °C for 8 h in air, respectively.
Raman spectra of BaZr1-xHoxO3-δ ceramics for x = 0, 0.05, 0.10, 0.15, and 0.20 sintered at 1600 °C for 8 h in air, respectively.