Zirconia hollow ball bricks and its use

 hollow ball as the main raw material made of heat insulation refractory products. (The main crystal phase of the brick is cubic zirconia (about 70% to 80% of the mineral phase), the refractoriness is greater than 2400 ℃, the porosity is 55% ~ 60%, the bulk density is 2.5 ~ 3.0g / Cm3, the compressive strength is not less than 4.9MPa, the thermal conductivity is 0.23 ~ 0.35w / (m · K) .The production method of zirconia hollow bricks is the same as that of the alumina hollow sphere. Melting temperature is higher, to reach more than 2700 ℃, the current domestic widely used as a stabilizer CaO.

use

Zirconia hollow ball products are made entirely of zirconia hollow spheres, with good high temperature strength and stable stomatal structure, for the ultra-high temperature equipment in the furnace and other parts of the insulation materials, such as the frequency of high temperature furnace, carbon black reactor, tungsten Bar furnace, molybdenum furnace and so on.

Zirconia hollow bricks are excellent insulation products, the highest safe use temperature of 2200 ℃, in metallurgy, petrochemical, electronics and other industrial thermal equipment as a direct contact with the flame of high temperature lining material, the use of good results.