“…2009;Ferkel et al, 1997;Shishkovskii, 2005;Shishkovsky et al, 2007;Subramanian & Marcus, 1995;Subramanian et al, 1993). Among these methods are SLS of both α-Al 2 O 3 (Da Shen et al, 2007;Zhao et al, 2003) and α-Al 2 O 3 -α-Cr 2 O 3 (Nubling & Harrington, 1997;Quispe Cancapa et al, 2002;Yen, 1999).…”