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BAL Insulating Firebrick(High Alumina)


BAL Insulating Firebrick(High Alumina)
BAL Insulating Firebrick(High Alumina)

BAL Series are special-purpose alumina insulating firebricks developed using ISOLITE’s own proprietary technology.

Manufactured from alumina hollow particles, 99% Al₂O₃ content, and has the following properties:

① High corrosion resistance  ② High spalling resistance

Typical Applications

Bright Annealing, Powder Metallurgy Sintering, Brazing, Semiconductor Sintering and Hydrogen Atmosphere  Heat Treating Furnaces


BAL-99  : Standard

BAL-99M : Increased mechanical strength

BAL-LS : Minimal impurity content to minimize the presence of impurities in the furnace during use in high  temperatures and highly reduced atmospheres.


Product Name BAL-99 BAL-99M BAL-LS
Max. Service Temperature (°C) 1800 1800 1800
Bulk Density 1.64 1.63 1.62
Cold Crushing Strength
(MPa) JIS R 2615
15.9 20.4 12
Modulus of Rupture
(MPa) JIS R 2619
5.5 9.6 4.4
Thermal Conductivity at 800°C

(W/(mK)) JIS R 2616

1.65 1.65 1.65
Reheat Shrinkage (%)

at 1700°C×8h JIS R 2613:1985

0.3 0.2 0.03

Composition (%)

JIS R 2216

AlO 99.2 99.3 99.3
SiO 0.4 0.4 0.4
FeO 0.4 0.1 0.1


Data shown are typical values obtained in accordance with accepted test methods.
They are provided for your reference only and are subject to change without notice. 





Branch Office: Overseas Department,
Tokyo, Osaka, Nagoya, Kyushu

Business hours: 9:00~17:15 tel+81-6-7711-5808

【Contact by e-mail】


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