Highly loaded, pourable suspensions of particulate materials

Compositions – Inorganic luminescent compositions – Tungsten containing

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2523131, 2523132, 252314, 264212, 501 1, 501 94, 501 97, 501 98, 501103, 501126, 501127, 501133, 501137, 501 96, 501138, 501139, 501152, 501153, 501154, 501154, B01J 1302, C04B 3502, C04B 3510, C04B 3332

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049044117

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.

REFERENCES:
patent: 3956145 (1976-05-01), Christopher, Jr. et al.
patent: 4221697 (1980-09-01), Osborn et al.
patent: 4301020 (1981-11-01), Johnson, Jr. et al.
patent: 4569920 (1986-01-01), Smith-Johannsen
patent: 4728578 (1988-03-01), Higgins et al.

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