Abstract: High density information discs comprising a conductive carbon-loaded polyvinylchloride disc is lubricated with a fractionated methyl alkyl siloxane lubricant which contains a long chain alkyl substituted betaine.

Abstract: Extremely small, e.g., 2 micron diameter, cathodochromic sodalite particles are prepared through a hydrothermal method. The method includes the steps of uniformly heating a sealed reaction vessel which contains a water slurry of Al.sub.2 O.sub.3, SiO.sub.2, NaOH and NaX wherein X is at least one member of the group consisting of Cl-, Br-, and I-. The heating may be done at a temperature below about 356.degree. C. The heating is continued for an extended period of time to allow for dissolution of Al.sub.2 O.sub.3 and SiO.sub.2. The reaction vessel is then rapidly cooled so as to precipitate uniform size spherical particles of sodalite. The particles of sodalite are then sensitized. The sensitized sodalite particles are well suited for use in cathodochromic screens, i.e., screens employing these particles exhibit high sensitivity, high contrast, and high resolution.

Abstract: Self-activated ultraviolet-emitting hafnium pyrophosphate phosphors. Up to about 20 mole percent of the hafnium may be substituted with one or more of zirconium, germanium and silicon. The phosphors, which may be excited by ultraviolet radiation, x-rays and electron beams, may be used as energy converters in photodevices. The phosphors may be prepared by heating a mixture of a hafnium compound, a phosphate (no added activator ions) and optionally compounds of one or more of zirconium, germanium and silicon, which are present in proportions up to about 25 mole percent of the hafnium present, at about 1000.degree. to 1300.degree. C in air.

Abstract: Self-activated ultraviolet-emitting zirconium pyrophosphate phosphors, wherein 0.01 to 20 mole percent of the zirconium is substituted with one or more of hafnium, germanium and silicon. The phosphors, which may be excited by ultraviolet radiation, x-rays and electron beams, may be used as energy converters in photodevices.