Zirconia Bubble Bricks

Zirconia bubble bricks are ultra-high temperature insulating refractory materials made from zirconia hollow spheres as the primary raw material. They possess excellent high-temperature resistance, low thermal conductivity, and stable chemical properties. These bricks can be used long-term in environments exceeding 2200°C, making them an ideal lining and insulation material for ultra-high temperature industrial kilns.

Key Features

High Refractoriness:Service temperature can reach 2200°C to 2400°C.
Excellent Insulation:The hollow sphere structure significantly reduces bulk density and thermal conductivity, ensuring high thermal efficiency.
Strong Chemical Stability:Exhibits exceptional oxidation and corrosion resistance at high temperatures.
Thermal Shock Resistance:Good performance under rapid temperature changes.

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Typical Physical and Chemical Indicators

Item	Specifications
ZrO₂ (%)	≥ 93
CaO (%)	3.5 ~ 5.5
SiO₂ (%)	≤ 0.5
Bulk Density (g/cm³)	2.4 ~ 3.0
Cold Crushing Strength (MPa)	≥ 10
Thermal Conductivity W/(m·K) (1000°C)	≤ 1.2
Max Service Temperature (°C)	2200

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