At 1000℃, the thermal conductivity of aluminum silicate fiber blanket is only 15% of that of refractory clay brick. Why does it have such a low thermal conductivity? This can be analyzed from the following aspects.
1 the temperature. The heat conductivity at different temperatures corresponds to the bulk density, which generally increases with increasing temperature.
2 unit weight. The increase of bulk density will decrease the thermal conductivity of aluminum silicate fiber, but the decrease amplitude is decreasing. When the bulk density increases beyond a certain range, the heat conductivity tends to rise instead of decline.
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