Accession Number : ADA195863

Title :   Deflocculants for Tape Casting Barium Titanate Dielectrics.

Descriptive Note : Final rept. 15 Mar 82-30 Sep 87,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK N J DEPT OF CERAMICS

Personal Author(s) : Cannon, W R

PDF Url : ADA195863

Report Date : Feb 1988

Pagination or Media Count : 99

Abstract : A typical nonaqueous tape casting system based on a commercial acrylic binder was studied to understand the system in more depth. The following conclusions were drawn: The best surfactants for dispersing barium titanate in the MEK-ethanol solvent system among those tested was found to be phosphate esters. Evidence from conductivity measurements indicated that the phosphate ester adsorbed on the BaTiO3 powder surface prior to ionization in the solution. The state of dispersion of a slip(as measured by relative viscosity)containing the acrylic binder, two plasticizers, the phosphate ester and cyclohexanone was found to be better than that of the solvent, powder and phosphate ester. The only component which adversely affected the relative viscosity was the PEG plasticizer and then especially when water was carried in as an impurity. Keywords: Dielectrics; Barium titanate; Dispersants; Acrylics; Deflocculants; Tape casting; Phosphate ester. (jes)

Descriptors :   *ACRYLIC RESINS, BARIUM TITANATES, BINDERS, CASTING, COMMERCE, CONDUCTIVITY, CYCLOHEXANONES, DIELECTRICS, DISPERSANTS, DISPERSING, ESTERS, IMPURITIES, IONIZATION, MEASUREMENT, PHOSPHATES, PLASTICIZERS, SURFACE ACTIVE SUBSTANCES, TAPES, VISCOSITY, WATER

Subject Categories : Plastics
      Electricity and Magnetism
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE