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Silica Insulation Brick

Silica insulation brick is mainly made of top-class silica, via shaping and burning under high temperatures.


Silica insulation bricks are one kind of lightweight insulation brick with over 91% silica content and less than 1.2g/cm3 density, silica insulation brick can service in a high temperature between 1500~1550℃ for the long term.

silicon insulation brick has the features of lightweight, high strength, and low thermal conductivity, high-temperature resistance, and low impurities

Silica insulation refractory brick is wildly used for the insulation of industrial furnaces, it can be used in glass furnaces and hot blast stoves, silica insulation blocks also can be used in coke ovens, carbon forging furnace and any other industrial furnaces.

Physical And Chemical Index

Item QG-0.8 QG-1.0 QG-1.1 QG-1.15 QG-1.2
SiO2  % ≥88 ≥91 ≥91 ≥91 ≥91
Bulk Density g/cm3 ≤0.85 ≤1.00 ≤1.10 ≤1.15 ≤1.20
Cold Crushing Strength Mpa ≥1.0 ≥2.0 ≥3.0 ≥5.0 ≥5.0
0.2Mpa Refractoriness Under Load T0.6 ≥1400 ≥1420 ≥1460 ≥1500 ≥1520
Permanent Linear Change On Reheating(%)1450℃X2h 0~+0.5 0~+0.5 0~+0.5 0~+0.5 0~+0.5
20-1000℃ Thermal Expansich10-6/℃ 1.3 1.3 1.3 1.3 1.3
Thermal Conductivity (W/MK) 350℃ 0.55 0.55 0.60 0.65 0.70

silica insulation brick7

silica insulation brick8

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