Tin oxide refractory and method for its production
View Patent ↗To provide a tin oxide refractory which prevents volatilization of SnO 2 in a high temperature zone from an early stage and which also has high erosion resistance to glass. A tin oxide refractory comprising SnO 2 , SiO 2 and ZrO 2 as essential components, wherein the total content of SnO 2 , SiO 2 and ZrO 2 in the tin oxide refractory is at least 70 mass %, and, based on the total content of SnO 2 , SiO 2 and ZrO 2 , the content of SnO 2 is from 32 to 98 mol %, the content of SiO 2 is from 1 to 35 mol % and the content of ZrO 2 is from 1 to 35 mol %.
1. A tin oxide refractory comprising SnO 2 , SiO 2 and ZrO 2 as essential components,
wherein the total content of SnO 2 , SiO 2 and ZrO 2 in the tin oxide refractory is at least 70 mass %, and,
based on the total content of SnO 2 , SiO 2 and ZrO 2 ,
the content of SnO 2 is from 76 to 98 mol %,
the content of SiO 2 is from 1 to 12 mol % and
the content of ZrO 2 is from 1 to 35 mol %, and
wherein when heat treatment at 1,300° C. for 350 hours is conducted, a ZrSiO 4 phase and a ZrO 2 chase are formed on a sintered body surface of the tin oxide refractory.
2. The tin oxide refractory according to claim 1 ,
wherein the total content of SnO 2 , SiO 2 and ZrO 2 is at least 95 mass %.
3. The tin oxide refractory according to claim 1 ,
wherein, based on the total content of SnO 2 , SiO 2 and ZrO 2 ,
the content of ZrO 2 is from 1 to 12 mol %.
4. The tin oxide refractory according to claim 1 , further comprising at least one component selected from the group consisting of CuO, Cu 2 O, ZnO, Mn 2 O 3 , CoO, Al 2 O 3 , Sb 2 O 3 and Li 2 O.
5. The tin oxide refractory according to claim 1 ,
wherein after heat treatment at 1,300° C. under −700 mmHg for 350 hours, a volatilization rate of SnO 2 is at most ⅕ as compared with a SnO 2 sintered body having a SnO 2 content of at least 99 mol %.