Abstract: Compositions are disclosed for dyeing cross-linked novolac fibers, and blends thereof, using disperse dyes.

Abstract: An oxidation inhibitant paint for coating the surfaces of carbon or graphite articles comprises a suspension of about 10 to about 35 percent finely divided elemental boron, dispersed in a thermosetting resin such as a solution of furfuryl alcohol prepolymer, furfural and maleic anhydride. Silica or boron nitride may be added to the paint mixture, a preferred paint composition having about 22 to 23 percent boron and 2 to 3 percent silica, dispersed in a resin solution of about 48 to 49 percent furfuryl alcohol prepolymer, about 48 to 49 percent furfural and about 2 to 4 percent maleic anhydride. The paint may be applied to the carbon article (e.g., by brushing, spraying, dipping or rolling) and then cured to give a firmly adherent coating of resin, silica and elemental boron. The coating is strongly resistant against thermal and mechanical stresses applied to the carbon article, protecting the carbon against oxidation at temperatures up to at least 900.degree.C.

Abstract: Polarizable particulate material, such as organic and inorganic colloidal particles such as small pieces of metal, oxides and the like, zwitterionic molecules, and even living organisms and viruses can be preferentially removed from a liquid by dielectrophoresis, by passing the liquid containing the polarizable particulate material to be removed over a ferroelectric apparatus which generates a periodic non-uniform electric field near the boundary between alternately polarized portions of the ferroelectric material. The periodic non-uniform electric field is generated by subjecting portions of the ferroelectric material to an alternating potential to alternately polarize the portions, while allowing other portions of the ferroelectric material to remain polarized in the same direction.

Abstract: Solid diffusion sources for phosphorus doping comprise from 5 to 95 percent SiP.sub.2 O.sub.7 with an inert phase of ZrP.sub.2 O.sub.7. While such materials may be hot-pressed, it is preferred to cold-press and sinter to obtain diffusion source wafers of the appropriate dimensions and porosity. A preferred composition comprises from 25 to 75 weight percent SiP.sub.2 O.sub.7 the balance ZrP.sub.2 O.sub.7. Fabrication parameters range from about 4000 psi to about 20,000 psi pressure during cold-pressing, and from about 1080.degree.C to about 1190.degree.C firing temperature.