The expansion rate of aluminum silicate fiber felt will be different due to the specific product formula, production technology and use environment. According to the search results, here are some relevant information:

I. Ordinary aluminum silicate fiber felt:

Aluminum silicate fiber felt itself has the characteristics of small expansion when heated. Under normal use conditions, its expansion rate is relatively low, usually around 1%-3% * *. This low expansion rate enables it to maintain structural stability in high temperature environment and is not easy to be deformed due to thermal expansion.

II. Expandable aluminum silicate fiber felt with special formula:

By adding expansive materials (such as vermiculite) into aluminum silicate fiber, products with higher expansion rate can be prepared. For example, when the ratio of aluminum silicate fiber to vermiculite is 3:1, the expansion rate can reach 265%. This expansive material will expand when heated, forming a multi-layer sheet structure, further reducing the thermal conductivity and improving the thermal insulation performance.

III. Summary

The expansion rate of ordinary aluminum silicate fiber felt is low, usually around **1%-3%**, which is suitable for high-temperature thermal insulation scenes requiring structural stability.

The expansive aluminum silicate fiber felt with special formula has a high expansion rate of 265%, which is suitable for scenes requiring higher thermal insulation performance.

If more accurate inflation rate data is needed, it is suggested to contact the manufacturer for detailed technical parameters according to specific product specifications and usage requirements.