What are Polysilazanes?

Polysilazanes are polymers composed of alternating silicon, known for their exceptional high-temperature stability, resistance to oxidation, abrasion, and impact. With surface hardness ranging from 5H to 9H, they are highly scratch-resistant and exhibit resistance to chemicals, weathering, and UV radiation. Unlike silicone, polysilazanes feature a silicon/nitrogen (Si-N) backbone, serving as ceramic precursors that transform into advanced ceramics upon exposure to high temperatures.

Initially, polysilazanes start as liquids or malleable solids, akin to plastics, and can be molded into various solid objects. However, when heated, they transition into high-quality ceramics with hardness comparable to diamond and can withstand temperatures up to 2000°C.

Despite their discovery in 1964, polysilazanes have seen limited commercial success due to factors like high cost, specialized applications, unreliable availability, and low production volumes, particularly in the U.S.

Hathaway Advanced Materials, Inc.

Properties

Polysilazanes appear colorless to pale yellow in liquid or solid form, and exhibit low volatility. Upon heating, they undergo cross-linking, resulting in higher molecular weight polymers. Hydrogen and ammonia release occurs between 100°C and 300°C, accompanied by increased cross-linking. Pyrolysis typically begins around 700°C to 1200°C. Polysilazanes are often characterized by a faint ammonia odor. However, Hathaway Advanced Materials, with its unique manufacturing process, produces polysilazanes with lower odor and a higher flash point than traditional products. This enhances safety and handling ease, especially in industrial settings. The product's exceptional performance, sometimes surpassing all competitors, and its ability to reduce product costs provide clear advantages across various applications and markets.

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Hathaway Advanced Materials, Inc.

Applications

  • Coatings
  • Prepregs
  • Pre-Ceramics
  • Ceramics
  • Composites
  • Hybrids
  • Additive Manufacturing (3-D Printing)

Forms Available

  • Liquid (100% Solids Viscosities From Low to Highly Viscous)
  • Solid (Thermostable Soft, Deformable Solid)
  • Powder
  • Foam
  • Fiber Film Former