SDN® refers to a process in which solid substances and/or nanoparticles dispersed or dissolved in a liquid agglomerate together to form a continuous network extending throughout the liquid. SDN® can be considered the multi-step evolution of modified hybrid sol-gel routing, overcoming the major limitations of the original modified sol-gel routing process. Within the past several years, a number of developments in precursor solutions, coating processes and equipment have made this technique even more widespread.
The SDN® Technology
is one of the most promising methods for developing nanostructures, including nanostructured coating materials, powders and monolithic structures with various functions. Controlled materials are produced with precursor alkoxides, carboxylates and alkoxides prepared at low temperatures. Precursors undergo hydrolysis and polycondensation to form a colloid, containing both a liquid and solid phase. The ultimate microstructure is finalized by a drying and firing process that removes the liquid phase and enables controlled densification of the gel into the desired mechanical and structural properties.
The SDN® Technique
offers a low-temperature method for synthesizing materials that are either totally inorganic in nature or both inorganic and organic. The process, which is based on the hydrolysis and condensation reaction of organometallic compounds in alcoholic solutions, offers many advantages for the fabrication of coating materials, including excellent control of the stoichiometry of precursor solutions, ease of compositional modifications, customizable microstructure, ease of introducing various functional groups or encapsulating sensing elements, relatively low annealing temperatures, the possibility of coating deposition on large-area substrates, and simple and inexpensive equipment.
The SDN® Process
offers distinct advantages over other techniques. While traditional methods involve processing powders prepared at high temperatures, the SDN® process occurs at a much lower temperature, and therefore offers significant cost advantages. The process also provides better control over the product particle-to-particle interactions, allowing small quantities of dopants to be uniformly dispersed in the final product. Traditional methods involve compacting powder to a desired density, which often result in microstructural inhomogeneity.
Advenira's IP Portfolio:
- Patents families: SDN® Precursor Solutions, Anti-icing Coating, Modified Hybrid Sol-Gel Compositions, Stacks Including Sol-Gel Layers, Roll Coating, Coating Complex Objects and Rotation-Vibration
- Throughout the world, including US, Japan, China, Canada, Europe, Hong Kong, India, Korea, Australia, Russia, Taiwan and other countries
- Download Advenira® SDN® IP Portfolio List
- Discover our Technology Publications