Abstract: A basing cement comprises, in weight percent, 80 to 85 filler material of limestone and lithopone, and 15 to 20 of binder resins including at least 6 weight percent of araucaria resin.

Abstract: A method for making stir-in type halophosphate phosphors to obtain a fluffy, deagglomerated powder is disclosed. A wet phosphor filter cake is fed into a toroidal-shaped direct-fired glass flash dryer in which a hot gaseous stream is circulating. The wet phosphor particles are suspended in the stream while the remaining liquid is evaporated. The dried phosphor powder is ejected from the dryer by centrifugal force and collected. Recovery efficiency of the process is about 99.9 percent.

Abstract: A method is disclosed for producing alkaline earth halophosphate stir-in phosphors which comprises forming a mixture of about 55% to 75% calcium monohydrogen phosphate, about 15% to 35% calcium carbonate, about 2% to 20% ammonium chloride, about 1% to 15% manganese carbonate, about 1% to 15% antimony trioxide, and about 2% to 10% by weight calcium fluoride, wherein the average particle size of the calcium monohydrogen phosphate by Fisher subseive size is about 4.6 to 6.8 micrometers in diameter and the 50% Coulter Counter size is about 9.0 to 11.5, firing in a non-reacting atmosphere at 600.degree. C. to 1300.degree. C.

Abstract: Sintered phosphor chunks are deagglomerated by feeding the chunks into a crushing machine to break them into pieces small enough to be vacuum-transported to a vacuum tank from which they drop into a controlled device which distributes the phosphor pieces into a uniform flow. The pieces are then uniformly fed into a roll crusher having an upper pair and a lower pair of rolls, which crush the phosphor into pieces small enough for use in preparing phosphor coating suspensions.