In the field of modern LED packaging technology, zirconium oxide (Zirconia) has become a core material for improving device performance due to its high refractive index (1.9-2.2), excellent optical transparency and outstanding physical and chemical stability. The N-1715 nano zirconium oxide powder launched by Shenzhen U-Sunny provides a breakthrough solution for LED packaging glue, optical coating and functional ink through innovative surface treatment and particle size control technology (average particle size of about 20nm).
1. The core value of zirconium oxide in LED packaging
LED packaging glue needs to meet stringent requirements such as high refractive index, high transmittance and weather resistance. The refractive index of traditional epoxy resin and silicone resin is usually lower than 1.54, which limits the light extraction efficiency. Studies have shown that the refractive index of silicone packaging glue with 24vol% nano zirconium oxide can be increased to 1.59, and the light output power is increased by more than 13% compared with commercial glue. The mechanism is that nano zirconium oxide can significantly reduce the refractive index difference between the chip and the packaging glue, reducing the interface light loss. In addition, the wide optical band gap (>4.9eV) of zirconium oxide makes it almost non-absorbent in the ultraviolet to visible light region, ensuring high transmittance.
2. N-1715 Nano Zirconia: Performance Advantages Analysis
Shenzhen U-Sunny's N-1715 product adopts a phase transfer surface modification process to solve the industry problem of easy agglomeration of nanoparticles. This technology achieves efficient transfer of zirconium oxide from the aqueous phase to the organic solvent through the coating of phosphoric acid modifiers, forming a high-solid content, high-dispersion slurry that can be directly used for large-scale production of composite encapsulation glue3. Its core advantages include:
Optical enhancement: increase the refractive index of epoxy resin from 1.5001 to 1.5368, and the refractive index of silicone resin
Thermal stability: temperature resistance exceeds 800℃, suitable for high-temperature curing process;
Dispersion compatibility: adapt to a variety of polymer systems such as epoxy resin, silicone, acrylate, etc.
3. Empowering auxiliary materials: inks, adhesives and coatings
The application value of N-1715 is not limited to packaging substrates. It also performs well as a key auxiliary material in the LED manufacturing chain:
High refractive index optical ink: UV-curable ink with N-1715 can be used for patterning the surface of LED lenses, improving the wear resistance and color stability of inks, with a transmittance of >86%;
High-performance packaging adhesive: As a nanofiller for epoxy/organic silicone adhesives, it improves bonding strength while reducing the thermal expansion coefficient and inhibits the risk of cracking in the packaging layer;
Functional protective coating: Anti-oxidation coating used for LED brackets, with a 30% increase in hardness, and forms a dense barrier to block moisture erosion, extending the life of the device.
4. Innovative technology promotes industrialization
Shenzhen U-Sunny's phase transfer technology breaks through the high cost limitation of the traditional sol-gel method and realizes large-scale production with low environmental requirements and low operation complexity. This process gives N-1715 a filling rate of up to 60wt% in the composite system without loss of transparency, providing a cost-effective upgrade path for LED encapsulation adhesive manufacturers.
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