Although both Bubble Alumina Brick and Hollow Alumina Brick are used for heat insulation and insulation in high temperature environments, they have the following main differences in structure, performance and use:
| Bubble Alumina Brick | Hollow Alumina Brick | |
| structure | The bricks contain air bubbles, which are usually formed during the production process by introducing air or other gases. These bubbles reduce the overall density of the material and improve its thermal insulation properties. | This type of brick has a hollow structure inside, usually achieved by leaving a cavity in the brick body. This cavity can be regular or irregular, designed to reduce the weight of the material and enhance the thermal insulation effect. |
| Thermal insulation performance | Due to its internal micro-bubble structure, this brick has higher thermal insulation properties, as gases are poor conductors of heat. | Although it also has a heat-insulating effect, it may not be as good as the heat-insulating performance of bubble bricks due to the larger cavity, which may cause heat convection. |
| Mechanical strength | Because of the presence of air bubbles, the mechanical strength of this brick may be lower than that of a solid brick, but it is still sufficient for most high temperature applications. | The mechanical strength is also reduced due to the hollow structure, but if designed properly, it can still provide sufficient structural support. |
| Application Areas | Suitable for environments requiring extremely high thermal insulation performance, such as glass melting furnaces, ceramic kilns, etc. | It is often used in situations where lightweight thermal insulation materials are required, such as the lining of industrial furnaces, the insulation layer of heating furnaces, etc. |
| cost | Due to differences in the production process, Bubble Alumina Brick may cost more than Hollow Alumina Brick because of the additional process required to create the bubbles. | |