How Does The WFA Perform in Terms Of High-temperature Resistance?

White fused alumina (WFA) is a high-purity, conventionally sized α-Al₂O₃ product, commonly used as aggregate or in refractory matrix applications. Unlike white fused alumina micropowder, it exhibits significant differences in particle size, specific surface area, applications, and formulation effects.

Therefore, we have decided to present it side-by-side to facilitate quick decision-making for wholesale customers.

High-purity Al₂O₃ reduces chemical reactions with molten slag/steel, mitigating slag erosion and sintering problems. Controllable PSD and BET directly influence the formulation's bulk density, porosity, and sintering behavior, directly determining densification and high-temperature resistance. Furthermore, to ensure maintained mechanical properties at high temperatures and prevent the introduction of harmful ions that could lead to material degradation, effective thermal stability is crucial. This, in turn, determines the service life of the lining under cyclic heat loads and corrosive environments.

White fused alumina micro-powder (WFA micro-powder) is an ultrafine key raw material that has been finely pulverized/classified. Currently, it is commonly used in processing as a microfiller or active phase, and both typically contain ≥ 99.0% Al₂O₃, with the content of impurities such as Fe₂O₃, SiO₂, and TiO₂ kept to a minimum.

The main difference lies in the product itself: white fused alumina material and WFA micro-powder. It is generally used for micro-filling, densifying, and binder phase modification. Furthermore, the white fused alumina micro-powder we, as manufacturers, produce has a significant impact on formulations: only micro-powder can improve high-temperature strength by filling micropores and increasing the sintering/densification rate.