Figure 1.
(a) FE-SEM image, (b) XRD patterns of different W contents: (t-ZrO2: tetragonal, m-ZrO2: monoclinic, and monoclinic tungsten phase: m-WO3), and (c) WZ Raman spectrum of WZ at 650 °C.
(a) FE-SEM image, (b) XRD patterns of different W contents: (t-ZrO2: tetragonal, m-ZrO2: monoclinic, and monoclinic tungsten phase: m-WO3), and (c) WZ Raman spectrum of WZ at 650 °C.