Ceramic fiber blankets have the characteristics of heat resistance and heat preservation, so this is closely related to its thermal conductivity. So in actual production and use, what factors will affect the thermal conductivity of the product?
01 Apparent density: The thermal conductivity generally decreases with the decrease of the apparent density of the material. However, when it decreases to a certain extent, it increases rapidly with the decrease of the apparent density. Therefore, the characteristics of the thermophysical properties of lightweight thermal insulation ceramic fiber blankets are that the thermal conductivity is very small and the thermal conductivity is very large.
02 Material: The chemical middle layer, structure and aggregation state of ceramic fiber. When the apparent density of each type of material is alternate, the thermal conductivity of the material with a large thermal conductivity is also large. Temperature: The thermal conductivity of ceramic fiber blankets generally increases with the increase of temperature, but the increase is small, but the impact is not large, and it is generally not considered.
03 Humidity: The thermal conductivity of ceramic fiber blankets will decrease after absorbing moisture, and experiments show that the thermal conductivity may increase or decrease with the decrease or increase of moisture content. This is because the thermal conductivity depends on the ratio of thermal conductivity to volume heat capacity. When the moisture content of the material increases, the thermal conductivity and heat capacity increase. However, the rate of increase is different, which determines the change law of thermal conductivity.
The thermal conductivity is related to the performance and effect of ceramic fiber blanket, so in production, it is necessary to control factors such as density, material and humidity to improve the thermal conductivity of the product.
