Table 2.

Raman spectral data for Al₂O₃–(40,20 wt %) ZrO₂ after annealing at 600 °C and 1400 °C [45,52,53,54,55].

Al2O3–(20,40 wt %) ZrO2 after Annealing at 600 °C	Wavenumbers (cm−1)	Literature	Al2O3–(20,40 wt %) ZrO2 after Annealing at 1400 °C	Wavenumbers (cm−1)	Literature
			Al2O3–(20 wt %) ZrO2 after annealing at 1400 °C
t-ZrO2	148, 265, 312	[49]	t-ZrO2	147, 270, 315, 459	[49]
m-ZrO2	177, 188, 215, 355, 382, 477, 513, 559, 637	[49]	m-ZrO2	179, 190, 381, 419, 578, 647	[49]
γ-Al2O3	234, 404	[52,53]	α-Al2O3	381, 419, 431,578,647, 751	[52,53,54,55]
			Al2O3–(40 wt %) ZrO2 after annealing at 1400 °C
			t-ZrO2	145,269, 314, 456	[49]
			m-ZrO2	179, 190, 336, 351, 380, 417, 477, 507, 598, 647	[49]
			α-Al2O3	380, 417, 647, 753	[52,53,54,55]