Polysilazane: A multi-functional material Revolution from extreme industry to low-altitude economy


1. Lightweight Revolution: Breaking the Deadlock in Core Materials for Low-altitude Economy
In the fields of unmanned aerial vehicles and flying cars, polysilazane, with its low density (1.2-1.4g/cm³) and high strength (tensile strength 3.2GPa), has become an ideal choice for lightweight structural components. The Si-C-N ceramic fiber derived from it can replace some metal materials, reducing the weight of the machine body by 20% to 30%, while meeting the wide temperature range usage requirements from -50 ℃ to 1800℃.
The polysilazane coating technology developed by a certain research institution has been applied to the wings of unmanned aerial vehicles. Compared with traditional wool blended materials, its wear resistance has been improved by 40%, and it maintains stable aerodynamic performance during long-term flight. Lightweight design not only reduces energy consumption but also boosts the delivery efficiency of logistics drones by 15%, promoting the rapid expansion of the low-altitude economic market.


2. Complex environment protection: All-scenario corrosion-resistant solutions
Polysilazane coatings perform exceptionally well in extreme environments such as salt spray, ultraviolet rays, acids and alkalis. After 2,000 hours of salt spray testing, the retention rate of the coating impedance modulus exceeded 80%. The QUV ultraviolet aging test shows that its weather resistance is more than twice as good as that of traditional organic coatings. In Marine environments, the coating effectively blocks water vapor penetration through its nanoscale pore structure (with an average pore diameter of 12nm) and the hydrophobic effect of the Si-CH₃ group (contact Angle 120°).
Its high-temperature resistance (stable at 1350℃) and insulation properties (resistivity > 10¹⁴Ω · cm) make it the preferred material for gas turbine blades and 5G base station heat dissipation modules. After a certain model of base station antenna was coated with polysilazane composite coating, its service life was extended to 15 years in the high-humidity coastal environment, and the signal transmission loss was reduced by 10%.


3. Green Synthesis and Circular Economy: New Paths for Sustainable Development
The production process of polysilazane is accelerating its transformation towards environmental protection. The water-based sol-gel method developed by domestic teams has replaced the traditional organic solvent system, reducing VOCs emissions by 70% and lowering carbon emissions by 45% through bio-based methanol raw materials. After the upgrade of the EU REACH regulation, the proportion of environmentally friendly polysilazane products has increased from 5% in 2020 to 12% in 2023, and it is expected to exceed 25% by 2028.
In terms of recycling, the ceramic products after the pyrolysis of polysilazane can recover elements such as silicon and nitrogen through acid etching, with a recovery rate of over 90%, providing technical support for the resource closed loop.


4. Expansion of Emerging Applications: Quantum and medical fields are making their mark
In the field of quantum computing, the low dielectric loss (ε<2.5) property of polysilazane makes it a candidate material for the insulating layer of superconducting circuits. Tests by institutions such as IBM have shown that this material can reduce the transmission delay of quantum bit signals by more than 80%, promoting the miniaturization of quantum processors.
In the medical field, the proton exchange membrane modified by polysilazane has raised the operating temperature of hydrogen fuel cells from 80℃ to 180℃, increasing their efficiency by 15%. It has now entered the road test stage. Its biocompatibility and antibacterial properties (Si-Ag-C-N ceramics) also provide new ideas for the development of implantable device coatings.