| abstract |
An object of the present invention is to provide a high zirconia electroformed refractory material that has high corrosion resistance to molten glass and is less likely to crack during its production. As chemical components, based on oxides, ZrO 2 is 96.5 to 98.5% by mass, SiO 2 is 0.8 to 2.7% by mass, and the total amount of Na 2 O and K 2 O is as follows. 0.04 to 0.35% by mass, B 2 O 3 is contained in the range of 0.02 to 0.18% by mass, and the contents of Na 2 O, K 2 O and B 2 O 3 are the following: Equation (1) 0.03 ≧ CB2O3− ( CNa2O + CK2O ) (1) (Wherein, the content of C Na2 O is Na 2 O, content of C K2O is K 2 O, C B2 O3 is the content of B 2 O 3, both of which content in mass% in refractories High zirconia electroformed refractory that satisfies the relationship of [Selection] Figure 1 |