Dispersion of Ceramic Particles in Organic Liquids

Abstract

Good dispersion of oxide ceramics in organic solvents can be achieved using many different dispersants. Several types of dispersants, including fatty acids, coupling agents, polar aromatic compounds and polymers, are discussed to illustrate the important phenomena. Many new problems arise in actual slips during ceramics processing; these are briefly discussed.

The function of polymers in the tape casting of alumina

“…The addition of organic additives to a powderisolvent system described in Section 3 results in a slurry whose rheological behavior plays a significant role in ceramic processing, [54,671 especially during the dispersion and the tape-casting step. Sufficient control of the rheological parameters is necessary to optimize each process step and to understand the role of each component.…”

Colloidal stability of CuO nanoparticles in alkanes via oleate modifications

“…significant settling should not occur in static suspensions during several weeks or months. However, inorganic particles are not well dispersed in apolar organic solvents even there has been a variety of dispersants appropriate for organic suspensions, such as amine, thiols and fatty acids [2,[5][6][7][8][9][10]. Thus the stabilization of nanofluids based on oil systems usually not lasts over a week [2], which limits their applications.…”

“…The CuO has wide industrial applications besides nanofluids [11][12][13], but little work has been devoted toward its dispersion property in solvents. The OA is a popular dispersant for organic suspensions [5,[8][9][10], but its dispersion efficiency is always limited due to its low surface coverage on the particle. In the proposed dispersion process, the SOA instead of OA is utilized to pre-modify CuO nanoparticles in aqueous solution in order to increase the adsorption amount of oleate, and then the SOA-modified CuO nanopowder is dispersed into nalkanes with ultrasonic treatment.…”

Novel Dispersants of Silicon Carbide and Aluminum Nitride

“…The fish oil is also a fatty acid triglyceride with a mixture of individual tail lengths. The blown or oxidized sample also has additional cross-linking and acid sites as a result of the heat treatment (17). Fish oils are produced from whole-body oils of fish andfish-processing wastes; the mixtures are very complex and variable.…”