NDLI: Particle size effects on viscosity of silver pastes: a manufacturer's view

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Particle size effects on viscosity of silver pastes: a manufacturer's view

Content Provider	NASA Technical Reports Server (NTRS)
Author	Provance, J. Allison, K.
Copyright Year	1983
Description	Particles from a variety of silver powders were investigated by scanning electron microscopy and particle size analyses. Particle size distribution curves and volume population graphs were prepared for these silver powders and for glass powders with optimum, extra fine and coarse particle sizes. The viscosity at a given shear rate and slope of viscosity over a range of shear rates were determined for thick film pastes made with these powders. Because of particle anomalies and variations, the need for flexibility to achieve the best printing qualities for silver pastes was evident. It was established that print quality, dried and fired film density and optimum contact of silver particles with silicon, important for cell electrical output, could be achieved by adjusting the slope of viscosity that fell outside of the range, -0.550 to -0.650. This was accomplished through organic vehicle technology that permitted a change in the slope of viscosity, up or down, while maintaining a constant silver and total solids content.
File Size	7840540
Page Count	20
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840013924
Archival Resource Key	ark:/13960/t56f0ph4f
Language	English
Publisher Date	1983-11-15
Access Restriction	Open
Subject Keyword	Energy Production And Conversion Characterization Viscosity Silver Scanning Electron Microscopy Particle Size Distribution Concentration Composition Metal Films Glass Thick Films Silicon Electron Microscopy Paste Consistency Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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