Highly loaded, pourable suspensions of particulate materials
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 27, 1990
Issued Date -
N/A
app pub date -
Sep 9, 1988
filing date -
Apr 25, 1986
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Expired
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Abstract
Slurries or suspensions for forming sintered ceramic or metallic articles are described as having a high volume fraction of sinterable particles, at least 55% by volume. while the slurries maintain a pourable viscosity, such as not more that 2000 cPs at 100 s.sup.-1 ; the slurries can be dilatant and/or pseudoplastic. The slurries are prepared by using specific families of dispersants; namely acrylic acid-based polymeric polyelectrolytes, polyethylene imine-based polyelectrolytes, and coupling agents from the subfamilies of oxy-silane esters and phosphate esters. Fabrication of the compositions includes milling under high energy and the addition of at least a portion of the particles in a step-wise manner.
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