Zirconia Bubble brick is prepared from zirconia hollow ball. It has good high-temperature strength and stable pore structure. It is a heat insulation and fire-resistant product with excellent performance. The maximum safe use temperature is 2200 ℃. It is used as heat insulation material for furnace cover and other parts of ultra-high temperature equipment. It is used as high-temperature lining material in direct contact with flame in thermal equipment of metallurgy, petrochemical industry, electronics and other industries, and has good use effect.