Silica Bricks

Silica bricks have high high-temperature strength, a high refractoriness under load (1620 ~ 1680℃), and strong resistance to acidic slag corrosion. They do not deform after long-term use at high temperatures. The residual expansion during heating makes the masonry joints tight, ensuring good gas tightness and structural strength of the masonry. They are mainly used in thermal kilns such as coke ovens and glass melting furnaces.

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Physical and Chemical Indicators

Item	BG-96A	BG-96B	BG-95	JG-94	GZ-94
SiO₂ (%)	≥ 96	≥ 96	≥ 95	≥ 94.5	≥ 94
Fe₂O₃ (%)	≤ 0.6	≤ 0.8	≤ 1.0	≤ 1.2	≤ 1.4
Melting Index (%)	≤ 0.5	≤ 0.7	/	/	/
Apparent Porosity (%)	≤ 21	≤ 22	≤ 22	≤ 22	≤ 24
True Density (g/cm³)	≤ 2.34	≤ 2.33	≤ 2.35	/	/
Cold Crushing Strength (MPa)	≥ 40	≥ 35	≥ 30	≥ 40	≥ 30
Refractoriness Under Load (0.2MPa, ℃)	≥ 1680	≥ 1670	≥ 1670	≥ 1650	≥ 1650
Permanent Linear Change (%) (1450℃×2h)	0~0.2	/	/	/	/
Residual Quartz (%)	≤ 3	≤ 1.5	/	/	/

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