Para-selective zeolite catalysts treated with halogen compounds
Partially protonated sodium-ZSM-5 method of making
Particulate silica
Particulate silica and its preparation
Perhydrosiloxane copolymers and their use as coating materials
Phosphorous removal in silicon purification
Phyllosilicate-intercalation compounds
Phyllosilicate-intercalation compounds
Plasma arc production of silicon nitride
Plasma production of polycrystalline silicon
Plasma production of trichorosilane, SiHCl.sub.3
Platelets for producing silicon carbide platelets and the platel
Pollucite crystalline powders with low thermal expansion coeffic
Poly(silicic acid)
Polyaluminosilicate process
Polycrystal silicon rod and production process therefor
Polycrystalline silicon production
Polycrystalline silicon rod for floating zone method and process
Polymeric aluminum silicate-sulphate and process for producing s
Polysilazane precursors for silicon nitride and resultant produc