Under the following introductionpolycrystalline mullite fiberThe Life Problem

Thermal insulation effect of polycrystalline mullite fiber

　　polycrystalline mullite fiberIt is a new type of refractory material and thermal insulation material that is widely used. Because of its high cost performance, many people will consider using it for building insulation. Can polycrystalline mullite fiber play a role in thermal insulation?

First introduce the conditions required for heat preservation. You should be able to understand the principle of aluminum silicate fiber cotton. Each object has its own specific heat capacity and each object has its own temperature. This is a heat source. High temperature will transfer heat like low temperature. The specific heat capacity of cement is relatively small, the heat absorption is fast, and the temperature is easy to rise, which will make the indoor temperature change greatly and transfer heat with the outside world. Rock wool is made of mineral wool, its specific heat capacity is relatively large, and the influence of the outside temperature on it is relatively small. When the outside temperature changes, the temperature change is very small, which can ensure that the change of the indoor temperature is small and achieve the effect of heat preservation.

However, it should be noted that the polycrystalline mullite fiber material cannot be wetted by moisture or water, which will seriously affect the function of the polycrystalline mullite fiber and should be used in accordance with the relevant instructions.

Causes of cracks in polycrystalline mullite fibers

1. It is caused by too fine fiber fineness modulus and too high mud content.

2. aluminum silicate fiber cotton pulp water absorption rate is too high, winter frost heave caused cracks.

3. Aluminum silicate fiber cotton products mixed unevenly, inconsistent shrinkage stress.

4. The proportion of cement is too large and the label is too high, resulting in early shrinkage of aluminum silicate fiber cotton.

5. Insufficient flexibility index and small elongation reduce the deformation resistance of ceramic fiber products.

Relationship between temperature and service life of polycrystalline mullite fiber

Polycrystalline mullite fiber is very cost-effective, but we all hope that the materials we buy are more durable and have a longer service life. Among them, the factor that affects the service life is temperature, so what is the service life of polycrystalline mullite fiber and temperature? In order to facilitate our customers to better use polycrystalline mullite fiber materials, let us learn about it through the following article.

　　polycrystalline mullite fiberThe service life of the felt is directly related to the temperature. If the temperature allows, the crystal development of the product will become extremely slow, the performance will be more stable, and it can work continuously for 5-10 years.

If the product is placed in an environment containing corrosive substances, such as kiln atmosphere, the use temperature of refractory insulating fibers should be determined according to the specific fuel used in the kiln. If it is used to reduce furnace gas, it is necessary to use high-purity synthetic Polycrystalline mullite fiber blanket made of materials is used as the lining material of industrial furnace walls and is coated with anti-corrosion coating.

In addition, in order to make the thermal insulation material achieve the same thermal insulation effect in the reducing atmosphere, we should calculate the thickness of the wall lining according to the composition of the reducing atmosphere to avoid any problems in the work.

Therefore, at different working temperatures, even aluminum silicate needled blanket products have different service life.

Xiao Bian will not introduce much today. Thank you for watching. Let's see you next time.