96% Undensified Silica Fume SF-96

A purity of 96% indicates an extremely low content of impurities (such as alkali metals, iron oxides, and free carbon). Under extreme high-temperature conditions, impurities are highly prone to forming low-melting-point phases, leading to structural collapse of the material. Silicon dioxide with 96% purity forms a highly stable network structure within the matrix, significantly enhancing the material’s volumetric stability and high-temperature strength, making it an indispensable key powder for withstanding extremely harsh operating conditions.

The particle morphology of 96% Silica Fume exhibits a highly perfect amorphous spherical shape. When used in combination with high-efficiency water-reducing agents or special dispersants, it not only acts as a lubricant—similar to a “ball bearing”—to improve construction rheology, but also significantly expels free water from the interstitial spaces between particles. This “ultra-low water-to-binder ratio” characteristic is key to creating an ultra-dense, ultra-high-strength, high-temperature-resistant matrix.

Undensified processing is designed to meet the precise dosing and dust-free management requirements of high-end industrial production lines. High-purity Silica Fume in its natural state is highly prone to airborne dispersion, which not only increases material loss but also contaminates the workshop environment. Undensified technology uses purely physical micro-agglomeration to increase bulk density, thereby reducing long-distance transportation costs and eliminating airborne dust. Under the combined action of mechanical agitation and dispersants, these physical agglomerates instantly disaggregate without affecting the material’s ultra-high specific surface area or uniform dispersion.

We fully understand that industrial-grade customers have a “zero-tolerance” policy regarding the stability of raw materials. Before each batch of 96% Undensified Silica Fume leaves the factory, it undergoes multiple rounds of rigorous spectral analysis and physical property testing. We strictly control fluctuations in the main silica content and ensure that trace impurity levels consistently remain below the industry’s stringent limits. Every shipment is accompanied by a dedicated Certificate of Analysis (COA), ensuring that customers do not need to frequently adjust formulation parameters during long-term production.

High-purity powders are extremely sensitive to moisture. To prevent moisture absorption and product degradation during ocean freight exports or long-distance interprovincial transport, we use a heavy-duty, multi-layer composite moisture-proof packaging system. Through repeated testing, this rigorous physical barrier has been proven to effectively block external moisture, ensuring the product remains absolutely dry and maintains excellent flowability from the moment it arrives at the customer’s facility until the very last moment before the bag is opened and the material is dispensed.

This product is specifically designed for specialty refractory castables and extreme high-temperature environments; it is not intended for general construction applications. In high-end castable formulations, it delivers exceptional micron-level filling effects and extremely high reactivity, significantly reducing the system’s water content and enhancing density. This enables the castable to demonstrate top-tier wear resistance and spalling resistance even under extreme thermal shock testing at temperatures exceeding 1630°C and under conditions of intense erosion.