Using Recrystallized Silicon Carbide as a Membrane

Membrane layers  Recrystallized silicon carbide is an advanced engineered ceramic comprised of more than 99% silicon carbide (SiC), which has been consolidated at temperatures above 2000°C (3992°F). Thermal processing of such intensity induces the sublimation of finer silicon carbide particles and their condensation at the boundaries of larger, interlocking grains. This low-density arrangement results in an open porosity structure of more than 40%, representing enhanced permeability with the exceptional inherent chemical and mechanical characteristics of silicon carbide.

Ceramic membranes fabricated from silicon carbide display the benefits of outstanding thermal stability, thermal shock resistance, and weak organic matter adsorption. Both cross flow and dead-end filtration technologies with recrystallized silicon carbide ceramic membranes exhibit reduced fouling with easy clean-in-place procedures and low backwash liquid consumption. High-temperature and chemically aggressive water, slurries, solvents, and cleaning solutions can be recirculated through the microfiltration membrane without risk of substantial corrosion to the ceramic membrane. These characteristics translate to improved operating conditions in terms of productivity, membrane lifetime, permeate quality, respect to the environment, and OPEX.

Crystar® filtration can improve the throughput of high-value products, for instance in the food and beverage or chemical industries. It can also improve the safety and quality of swimming pool water, with a demonstrable reduction in harmful biological compounds that contribute to pool closure risks, unpleasant odors, and irritation. These ceramic membranes are also improving the capacities of drinking water production and industrial wastewater reuse.

Explore our Crystar® filtration products below to find out more about how recrystallized silicon carbide is changing the world of air and liquid microfiltration.