report on cheap processes for fabrication of silicon solar cells of high efficiency

the pingroject is aimed at develop a process for fabrication of reproducible, stable silicon solar cells with high efficiency. a cheap and simple technology should substitute the present one without deterioration of the cell performance. the process here developed has used a spin-on doping, belt furnace instead of a quartz furnace tube, s..

adhesion of graphite fibers to epoxy matrices. iii. the effect of hygrothermal exposure. final rept. reprint: adhesion of graphite fibers to epoxy matrices. iii. the effect of hygrothermal exposure

reinforcing fibers are available from various manufacturers with matrix compatible finishes applied to them. usually these finishes or coatings are 100-200 nm thick resin layers applied after surface treatment. their function has been hypothesized as being to enhance adhesion through either protecting the fiber from handling damage, prote..

optical fibers as chemical sensors: coated optical fibers are demonstrated as chemical sensors. ntis tech note

this citation summarizes a one-page announcement of technology available for utilization. the first chemical sensor in which the chemical modifies the properties of an optical fiber sensing element has been designed, made, and demonstrated at sandia national laboratories. this new concept in chemical sensing has been demonstrated first wi..

interconnection materials development for solid oxide fuel cells final report, september 30, 1984-september 30, 1985

electrical conductivity, thermal expansion, and oxygen loss and oxygen transport rates have been determined for the electrochemically vapor deposited thin films of magnesium-doped lanthanum chromite which is currently used as the interconnection material in the high temperature solid oxide fuel cell. electrical conductivity of these inter..

laser materials: radiation damage. 1970-november 1985 (citations from the ntis data base). rept. for 1970-nov 85

this bibliography contains citations concerning laser beam damage to laser materials, including optical glass, mirrors, optical coatings, dielectrics, semiconductors, and alkali metal halides. the damage mechanisms are explored for various types of laser materials comparisons are made between variations in fabrication and preparation of t..

interfacial adhesion of carbon fibers. final report, november 1984-october 1986,

relative adhesion strengths between as4, as1, and xas carbon fibers and thermoplastic polymers were determined using the embedded single filament test. polymers studied included polycarbonate, polyphenylene oxide, polyetherimide, polysulfone, polyphenylene oxide blends with polystyrene, and polycarbonate blends with a polycarbonate polysi..

electroless plating of polymeric substrates. january 1970-july 1987 (citations from the u.s. patent database). rept. for jan 70-jul 87

this bibliography contains citations of selected patents concerning electroless plating techniques used for materials deposition on polymer substrates. plating methods and compositions utilized in printed circuit device fabrication are discussed. plating solution preparations, and substrate surface treatment methods are included (this upd..

preparation, characterization and utilization of electrodes coated with polymeric networks formed by gamma radiation crosslinking final rept. 1 aug 82-31 jan 87

the preparation, characterization and application of electrodes with specific chemical properties that are imparted by surface modification with polymer networks are the long-range goals of this research. networks that are formed by crosslinking with gamma radiation have been evaluated with respect to swelling in aqueous solution, retenti..

fire safety aspects of polymeric materials. volume 8. land transportation vehicles

this is the eighth volume in a series. the fire safety aspects of polymers are examined with primary emphasis on human survival. this volume is concerned with the polymeric materials used in subway, surface, and elevated urban railway vehicles; railroad vehicles; other rail vehicles (including unattended and semicontrolled type); buses, t..

development of a continuous manufacturing method for a cfrp (carbon fiber reinforced plastic) collapsible tube mast. final rept

a sequential molding process was developed for forming continuous lengths of profiled carbon fiber reinforced plastic (cfrp) sheet, and for the edge-bonding of two identical profiles to produce a lenticular-shaped collapsible tube mast (ctm). the process was designed to enable a wide range of ctm sizes, characterized by the shape radius r..