STA Alumina Bubble Bricks are for applications up to 1800°C. These refractory brick have excellent insulating properties and high hot strengths. Bubble alumina bricks are made with tiny hollow insulating spheres made from high-purity alumina (also called bubble alumina). Alumina does not exhibit high thermal conductivity, and when in the form of hollow spheres, its thermal conductivity is additionally reduced. Both properties make Bubble Alumina brick an excellent insulating material that can withstand exceptionally high temperatures. Typical applications for Bubble alumina bricks include gas or electrically heated kilns and furnaces, and glass making industries.
Alumina bubble bricks, also called alumina lightweight insulating fire bricks, are an insulating refractory product mainly composed of alumina hollow spheres. Alumina bubble bricks have low apparent porosity, low thermal conductivity, good thermal shock resistance and high temperature structural strength, can be directly masonry lining in high temperature furnace lining in contact with flame, and manufacturing high temperature furnace tubes, trays and protective covers.
The insulating firebrick that contains high-alumina bubbles are often used as the working lining in ceramic kilns, backup linings in gasifiers for coal and petroleum coke, gas/oil (with heavy residue feed stock), and industrial waste. These IFBs are also used in hazardous waste and fluorine processing incinerators, hydrogen generators, auto thermal reactors for methanol production, and ammonia reformers.
Alumina Bubble Bricks Properties
Good thermal stability
High refractoriness
Low thermal conductivity
High temperature strength
Low volume density
Excellent insulation effect
High-purity alumina refractory brick hollow insulating spheres are designed to withstand high temperatures and demanding environments. These bubbles themselves are an important component in refractories used for many different applications, including insulation of kiln brick and ceramic tile linings in gas turbines, backup linings in reactors, and working linings in manufacturing high-purity quartz for the electronics industry.
Alumina bubble brick, also known as alumina lightweight insulating fire brick, is made of alumina bubbles and alumina powder as main raw materials, combined with other binders, and fired at a high temperature of 1800°C. It belongs to a kind of energy-saving insulation material of ultra-high temperature materials - insulating fire bricks.
Alumina Bubble Brick Specs
property | Alumina Insulation Brick | |||
Grade | STA-1700 | STA-1800 | STA-1800-S | |
Classification temperature (°C) | 1700°C | 1800°C | 1800°C | |
Bulk Density (g/cm3) | 1.3--1.6 | 1.4--1.65 | 1.55 | |
Cold Crushing Strength (kg/cm2) | 95 | 100 | 150 | |
Thermal Conductivity (W/mK) at 350°C | 0.9 | 1.0 | 0.9 | |
Reheat shrinkage (1,700°C*8 hours, %) | 0.1 | 0.08 | 0.06 | |
Chemical Composition (%) | Al2O3 | 90% | 98.0 Min | 99.2 |
SiO2 | 0.3 | 0.25 | 0.2 | |
Fe2O3 | 0.3 | 0.2 Max | 0.2 | |
Alumina Bubble Bricks Advantages
Compared with ordinary insulating fire bricks, alumina bubble bricks contain a large number of closed pores, so it has high strength and stable pore structure, low density and low thermal conductivity. Moreover, alumina bubble brick has achieved significant effects on reducing the weight of furnace body, modifying the structure, saving materials and saving energy. The superiority of alumina bubble bricks are as follows:
High Operating Temperature of refractory brick
The use temperature of alumina bubble bricks is above 1800°C, and it has good thermal stability. The refiring linear change of alumina bubble brick is small, so it has a longer service life.
Modifying Structure
Alumina bubble bricks can optimize the structure and reduce the weight of furnace body. Now high temperature resistant materials are all heavy bricks with a bulk density of 2.6-3.0g/cm, while alumina bubble bricks are only 1.1~1.5g/cm. Alumina bubble bricks can reduce 1.1- 1.9 tons of weight in the same cubic meter volume.
Saving Material of refractory brick
At the same temperature, the price of heavy bricks and alumina bubble bricks are equivalent, if use alumina bubble bricks, we can not only save 1.1-1.9 tons of heavy bricks, but also save 80% of refractory insulation materials.
Saving Energy
Alumina bubble brick has the characteristics of thermal insulation, low thermal conductivity, so it can have a good effect on thermal insulation, reducing heat dissipation and improving thermal efficiency. Alumina bubble brick is a lightweight refractory bricks with high temperature resistance and energy saving. It is very stable in various atmospheres especially applied in the high temperature kilns at 1800°C.
STA Alumina Bubble Bricks are for applications up to 1800°C. These refractory brick have excellent insulating properties and high hot strengths. Bubble alumina bricks are made with tiny hollow insulating spheres made from high-purity alumina (also called bubble alumina). Alumina does not exhibit high thermal conductivity, and when in the form of hollow spheres, its thermal conductivity is additionally reduced. Both properties make Bubble Alumina brick an excellent insulating material that can withstand exceptionally high temperatures. Typical applications for Bubble alumina bricks include gas or electrically heated kilns and furnaces, and glass making industries.
Alumina bubble bricks, also called alumina lightweight insulating fire bricks, are an insulating refractory product mainly composed of alumina hollow spheres. Alumina bubble bricks have low apparent porosity, low thermal conductivity, good thermal shock resistance and high temperature structural strength, can be directly masonry lining in high temperature furnace lining in contact with flame, and manufacturing high temperature furnace tubes, trays and protective covers.
The insulating firebrick that contains high-alumina bubbles are often used as the working lining in ceramic kilns, backup linings in gasifiers for coal and petroleum coke, gas/oil (with heavy residue feed stock), and industrial waste. These IFBs are also used in hazardous waste and fluorine processing incinerators, hydrogen generators, auto thermal reactors for methanol production, and ammonia reformers.
Alumina Bubble Bricks Properties
Good thermal stability
High refractoriness
Low thermal conductivity
High temperature strength
Low volume density
Excellent insulation effect
High-purity alumina refractory brick hollow insulating spheres are designed to withstand high temperatures and demanding environments. These bubbles themselves are an important component in refractories used for many different applications, including insulation of kiln brick and ceramic tile linings in gas turbines, backup linings in reactors, and working linings in manufacturing high-purity quartz for the electronics industry.
Alumina bubble brick, also known as alumina lightweight insulating fire brick, is made of alumina bubbles and alumina powder as main raw materials, combined with other binders, and fired at a high temperature of 1800°C. It belongs to a kind of energy-saving insulation material of ultra-high temperature materials - insulating fire bricks.
Alumina Bubble Brick Specs
property | Alumina Insulation Brick | |||
Grade | STA-1700 | STA-1800 | STA-1800-S | |
Classification temperature (°C) | 1700°C | 1800°C | 1800°C | |
Bulk Density (g/cm3) | 1.3--1.6 | 1.4--1.65 | 1.55 | |
Cold Crushing Strength (kg/cm2) | 95 | 100 | 150 | |
Thermal Conductivity (W/mK) at 350°C | 0.9 | 1.0 | 0.9 | |
Reheat shrinkage (1,700°C*8 hours, %) | 0.1 | 0.08 | 0.06 | |
Chemical Composition (%) | Al2O3 | 90% | 98.0 Min | 99.2 |
SiO2 | 0.3 | 0.25 | 0.2 | |
Fe2O3 | 0.3 | 0.2 Max | 0.2 | |
Alumina Bubble Bricks Advantages
Compared with ordinary insulating fire bricks, alumina bubble bricks contain a large number of closed pores, so it has high strength and stable pore structure, low density and low thermal conductivity. Moreover, alumina bubble brick has achieved significant effects on reducing the weight of furnace body, modifying the structure, saving materials and saving energy. The superiority of alumina bubble bricks are as follows:
High Operating Temperature of refractory brick
The use temperature of alumina bubble bricks is above 1800°C, and it has good thermal stability. The refiring linear change of alumina bubble brick is small, so it has a longer service life.
Modifying Structure
Alumina bubble bricks can optimize the structure and reduce the weight of furnace body. Now high temperature resistant materials are all heavy bricks with a bulk density of 2.6-3.0g/cm, while alumina bubble bricks are only 1.1~1.5g/cm. Alumina bubble bricks can reduce 1.1- 1.9 tons of weight in the same cubic meter volume.
Saving Material of refractory brick
At the same temperature, the price of heavy bricks and alumina bubble bricks are equivalent, if use alumina bubble bricks, we can not only save 1.1-1.9 tons of heavy bricks, but also save 80% of refractory insulation materials.
Saving Energy
Alumina bubble brick has the characteristics of thermal insulation, low thermal conductivity, so it can have a good effect on thermal insulation, reducing heat dissipation and improving thermal efficiency. Alumina bubble brick is a lightweight refractory bricks with high temperature resistance and energy saving. It is very stable in various atmospheres especially applied in the high temperature kilns at 1800°C.
