Ag colloidal nanoparticle （Conductive film forming material / Reflecting film forming material ）

Product Lineup Ag colloidal nanoparticle / A-1 / Silver concentration :10% / Conductive film forming ink ( alcohol system ) Ag colloidal nanoparticle / A-2 / Silver concentration : 10% / Reflecting film forming ink (alcohol system) Ag colloidal nanoparticle / H-1 / Silver concentration : 20% 　( aqueous dispersion ) As a lineup of our conductive materials series, we have launched silver nano-colloid. It is primarily used for conductive film and reflecting film.

Characteristics of product

• Ag colloidal nanoparticle is possible to achieve sintering in a short period of time. The protective agent, which covers surface of particles, is only a few percent or less of the silver, it decomposes by the heating at the temperature of 180℃ or higher in the atmosphere hardly remaining residues. Sintering proceeds up to the interface with substrate.

Main functions

• Conductivity close to that of bulk silver
• Capability of sintering at low temperature for a short period of time
• Capability of forming transparent conductive film by thin coating
• High internal reflectivity (reflection from substrate side)

Product applications

• Conductive film
• Reflecting film
  
• Solar heat-ray reflecting film
  
• Transparent conductive film

　　

Characteristics of silver nanoparticle

　　　　　 　　　

　　　　　　　　　　　　　　　　　 Ｆｉｇ１．ＴＥＭ image

　　　　　　　　　　　　　　　Ｆｉｇ２．Grain size distribution

　　　　　＊Temperature Programmed Desorption / Decomposition-Mass Spectrometry

　　　　　　　　 　　　　　　　　　　　　　 Ｆｉｇ３．TPD-MS*analysis
　　　

Ｆｉｇ４．Volume resistivity of coated film

Ｆｉｇ５．Cross-section SEM image after sintering

Ｆｉｇ６．Internal reflectivity of coated film

Ｆｉｇ７．Appearance of reflectingfilm (from the back side of glass substrate)

「Example of film forming condition」
※ Sintering at 200℃ in the atmosphere for 10 minutes (film thickness of 200nm)　→ Volume resistivity: 2.3 [μΩ・cm]
※ These are representative values and are not guaranteed.