Recently, a novel organic polyborosilazane material named IOTA-9120 has garnered significant attention. This material, composed of repeating Si-N and Si-N-B units, serves not only as a thermoset resin but also as a ceramic precursor, capable of producing high-temperature-resistant SiBCN ceramics under relatively mild conditions.

IOTA-9120 can achieve cross-linking and curing at temperatures ranging from 120-180°C, with the curing process being selectable in either air or inert atmospheres. Additionally, utilizing a platinum catalyst, it undergoes hydrosilylation reactions at 80-100°C to complete curing, typically within 2-5 hours. Upon high-temperature pyrolysis, the cured IOTA-9120 transforms into ceramics, with amorphous products below 1600°C and crystalline products above this temperature. The composition of the ceramic products is closely related to the pyrolysis atmosphere, primarily producing SiC and Si3N4 in nitrogen or argon, Si3N4 in ammonia, and SiBOCN in air.

This material boasts low viscosity, short curing times, diverse curing methods, high ceramic yield, excellent adhesion to metal, ceramic, and graphite materials, and ease of preparation for SiBCN ceramics. Its appearance is a light yellow liquid with a solid content exceeding 99%, a molecular weight between 700-900, and a viscosity of 10,000-20,000 cp. The ceramic yield of the cured material (at 800°C) exceeds 50%, with a ceramic density of 1.70-2.00 g/cm³.

It is important to note that IOTA-9120 is sensitive to water and alcoholic solvents, undergoing hydrolysis or alcoholysis reactions that can degrade the product. Therefore, it should be avoided from contact with such solvents as well as acidic and alkaline protonic substances. The emergence of this material brings new possibilities for the preparation of advanced ceramics.
Organic polyborosilazane IOTA 9120-Nano coating product manufacturers