6Sakulin V Y, Migal V P, Margishvili A P, et at. High-temperature and refractory heat-insulating materials developed at the borovichi refractory kombinat joint-stock co [ J ]. Refract Ind Ceram, 2004, 45(4) :107 -113.
7Wang J B, Wang L B, Yang H, et al. Modification of alumina bub- bles with ammonium aluminum sulphate [ J ]. Ceram Int, 2006,32 (8) :905 -909.
8Allahevrdi M, Afshar S, Allaire C. Additives and the corrosion re- sistance of aluminosilieate refractories in molten A1-5Mg[ J ]. JOM, 1998,50(2) :30 -34.
9Afshar S, Allaire C. Improving low cement castables by non-wetting additives[ J ]. JOM ,2001,53 (8) :24 - 27.
10Caslro M N, Robles J M. Hernandez D A, et al. The effect of SrSO4 and BaSO4 on the corrosion and wetting by molten aluminum alloys of mullite ceramics [ J ]. Ceram Int, 2010,36 (4) : 1205 - 1210.