Abstract: A corrosion resistant high temperature superconductor and a method of preparing said superconductors involving substitution of ions in the lattice to relieve stress and strain caused by mismatched bond lengths. Specific examples of such superconductors are Y.sub.1-y Ca.sub.y Ba.sub.2-y La.sub.y Cu.sub.3 O.sub.7-d where O<y<1.0 and O<d<1 and YBa.sub.2-y Sr.sub.y Cu.sub.3 O.sub.7-d where 0<y<2 and O<d<1. In YBa.sub.2 Cu.sub.3 O.sub.7-d structure, the internal stresses estimated from the difference between the bond valence sum and the formal oxidation state for Ba and Cu ions indicate that the Ba atom is too large for Cu--O cage at oxygen stoichiometric d=0 and too small at d=1. Therefore, the Ba (1.52 .ANG.) is substituted by La (1.27 .ANG.) and for keeping the same oxidation state of Cu as in the prototype material the Ca (1.12 .ANG.) equivalent to La replaces the Y (1.019 .ANG.).

Abstract: A polymeric composition having improved toughness and conductivity comprising carbon fibrils, at least a portion of which are in the form of aggregates, wherein, as measured on an area basis, substantially all of the aggregates are less than about 35 .mu.m in diameter. A polymeric composition having improved toughness and conductivity is prepared by combining carbon fibrils, at least a portion of which are in the form of aggregates, with a polymeric material, mixing the combination to distribute the fibrils in the polymeric material and applying shear to the combination to break down the aggregates until substantially all of the aggregates are less than about 35 .mu.m in diameter.

Abstract: A melt textured growth process for bulk YBCO at temperatures below 950.degree. C. is provided so that the material (YBCO) can be combined with silver to produce bulk superconductors by providing a combination of precursors that provide melting at 950.degree. C. or lower temperatures. After melting of the thoroughly mixed precursors, the sample is cooled in a controlled temperature environment. The process makes it possible to use metallic silver or other normal metals such as gold, as components in the fabrication of long YBCO wires and cables while achieving a high critical current density.

Abstract: A soluble aniline conducting polymer characterized in that said conductive polymer comprises as a repeating unit an alkoxyl group-substituted aminobenzenesulfonic acid, its alkali metal salts, ammonium salts and/or substituted ammonium salts, and is a solid having a weight average molecular weight of about 1900 or more at room temperature, a conductive composition and electric conductor comprising the same, and a method for producing a soluble aniline conducting polymer having a weight average molecular weight of 10,000 t 3,240,000 characterized by polymerizing at least one compound (1) selected from the group consisting of an acidic group-substituted aniline, its alkali metal salts, ammonium salts and substituted ammonium salts in a solution containing a basic compound (2) using an oxidizing agent.

Abstract: A composition which is capable of imparting electrical conductivity and non-tackifying property, comprising (A) a carbon fluoride in which a ratio F/C of fluorine atom to carbon atom is more than 0.5 and less than 1.0 and (B) at least one selected from the group consisting of a thermoplastic resin, a thermosetting resin and a rubber, a paint composition containing the same, and a semi-electrically conductive roller for electrostatic copying machine having an electrically resistive layer formed from the composition.

Abstract: An electroconductive composition comprising a two-dimensional network of antimony-containing tin oxide crystallites in association with amorphous silica, the composition according to one aspect of the invention comprising a powder of submicron to tens of micron size particles capable of forming a conductive network within a carrier matrix, such as a thin film matrix, and a process for preparing the composition.

Abstract: The present invention presents a solid polymer electrolyte consisting of a multiphase polymer matrix and an electrolyte solution. The polymer matrix consists of a highly polar polymeric (HPP) phase impregnated with the electrolyte solution to form ion conducting channels, and a less polar polymeric (LPP) phase, constituting the support structure. Further, the invented solid polymer electrolyte may also include a second ion conducting channels, forming a multiphase microstructure in which the electrolyte solution is present around the LPP particles as a fine mesh-like network. The invention also presents two kinds of method for making such a solid polymer electrolyte. The first includes the steps of: making a multiphase polymer matrix; and impregnating the polymer matrix with an electrolyte solution.

Abstract: The invention relates to a conductive polymer complex which contains a polyaniline or derivative thereof doped with a protonic acid. By the method according to the invention, a conductive polymer is obtained having substantially reduced acidity, sufficiently high conductivity level, and which is suitable, for example, for being melt processed in conventional plastics processing apparatus. The acidity of the conductive polymer can be reduced by having the conductive polymer contain both a metal compound and an additionally neutralizing compound. The obtained conductive polymer material, having a pH value of approximately 3-8, can be mixed with an insulating polymer to produce a conductive plastics mixture. The invention also relates to a method of preparing a conductive polymer that is more processable by incorporating therein a plasticizing agent selected from the group consisting of water, a C.sub.1 -C.sub.3 alcohol, and mixtures thereof.

Abstract: The invention relates to a conductive polymer complex which contains a polyaniline or derivative thereof doped with a protonic acid. By the method according to the invention, a conductive polymer is obtained having substantially reduced acidity, sufficiently high conductivity level, and which is suitable, for example, for being melt processed in conventional plastics processing apparatus. The acidity of the conductive polymer can be reduced by having the conductive polymer contain both a metal compound and an additionally neutralizing compound. The obtained conductive polymer material, having a pH value of approximately 3-8, can be mixed with an insulating polymer to produce a conductive plastics mixture. The invention also relates to a method of preparing a conductive polymer that is more processable by incorporating therein a plasticizing agent selected from the group consisting of water, a C.sub.1 -C.sub.3 alcohol, and mixtures thereof.

Abstract: There is disclosed a copper oxide-filled polymer die attach adhesive composition for semiconductor package The copper oxide-filled polymer die attach adhesive composition for semiconductor package is made of an adhesion resin mixture and an inorganic filler, wherein the inorganic filler includes copper oxide selected from a group consisting of CuO, Cu.sub.2 O and the mixture thereof in an amount of approximately 0.1 to approximately 90% by weight. Optionally, silver may be contained in the composition. It is capable of maintaining electric conductivity under severe temperature cycle as well as providing bonding strength enough to prevent package crack and delamination.

Abstract: A stabilized non-conductive polyaniline solution comprising from about 1 to bout 10 percent by weight polyaniline or a polyaniline derivative, from about 90 to about 99 percent by weight N-methylpyrrolidone, and from about 0.5 percent by weight to about 15 percent by weight of a solution stabilizing additive selected from the group consisting of hindered amine light stabilizers, polymeric amines, and dialkylamines, percent by weight of additive based on the total weight of polyaniline or polyaniline derivative is provided together with a method for stabilizing a polyaniline solution.

Abstract: A metal oxide material comprises components, the composition of which is expressed by the following composition formula (I):Ln.sub.a Ca.sub.b Sr.sub.c Ba.sub.d Cu.sub.2+e-h M.sub.h O.sub.6+f C.sub.g(I)wherea+b+c+d=3, 0.2.ltoreq.a.ltoreq.0.8,0.2.ltoreq.b.ltoreq.1.0, 0.3.ltoreq.c.ltoreq.2.2,0.ltoreq.d.ltoreq.1.7, 0.ltoreq.e.ltoreq.0.8,0.ltoreq.h.ltoreq.0.2, 0<f<2.0,0.2.ltoreq.g.ltoreq.1.0,Ln is one or more elements or atomic groups selected from a group consisting of Y and lanthanoid elements and M is one or more elements or atomic groups selected from a group consisting of Al, Si, Ti, V, Cr, Fe, Co, Ga, Ge and Pd.

Abstract: In the production of a 124-type or 123-type superconductor by a sol-gel method using alkoxides of respective metals, the use of a compound wherein a sec-butoxy group and a hydroxy group are coordinated with a copper atom gives a superconductor composed of flat particles having a broad C plane. The dimensional ratio defined by l/d is at least 6.7 in the case of the 124-type or is at least 8.4 in the case of the 123-type. It shows a superconducting property at a liquid nitrogen temperature. This superconductor shows a higher critical current density than one obtained by a sintering method.

Abstract: An object of the present invention is to provide a composition for use in a formation of transparent and electrically conductive film having a low electric resistance and a high transmittance and a method for making the film mentioned above. A mixture of inorganic indium compound and organic tin compound is combined with organic compound capable of coordinating with either of indium and tin to form an organic solution. When the mixture is heated, the inorganic indium compound and the organic tin compound coordinating partially with the organic compound react with water of crystallization of inorganic indium compound. The organic tin compound is partially subjected to hydrolysis to form an intermediate complex compound including indium and tin. This suppresses the evaporation of tin and generates a uniform film having a high transmittance and a low electric resistance.

Abstract: A method of monitoring the fabrication of a superconductive material having a high critical temperature is wherein:the starting material is a mixture of powders of precursors for said material having stoichiometric proportions appropriate for the desired superconductive phase;the said mixture is agglomerated to form a tubular or a cylindrical piece;the agglomerated piece is placed in a controlled-atmosphere oven for synthesizing said superconductive phase;the conductivity of said piece is measured continuously;the temperature at which conductivity begins to decrease is exceeded and then the temperature is returned to a value where conductivity begins to increase; andthe temperature of the oven is permanently adjusted so that said conductivity does not decrease.

Abstract: A liquid for removing printing and screen printing inks consists of an essentially anhydrous mixture of (a) .gamma.-butyrolactone and/or N-methyl-2-pyrrolidone in an amount of up to 25% (v/v) and/or (b) propylene carbonate in an amount of up to 90% (v/v), and (c) up to 90% (v/v) of a high-boiling aromatic compound or a mixture of such compounds having a relative evaporation rate with respect to N-butyl acetate of 0.01 or less. Such a liquid can remove all printing and screen printing inks, and it is considerably less unhealthy than the known cleaning liquids.

Abstract: The invention provides acicular electroconductive tin oxide fine particles which has a mean diameter of 0.005-1 .mu.m and a mean length of 0.05-10 .mu.m and an aspect ratio of 3 or higher. The invention further provides a process for producing the acicular electroconductive tin oxide fine particles, which comprises firing a starting material containing tin, silicon and an alkali metal halide at 700.degree.-1200.degree. C. and removing soluble salts from the resulting fired product.

Abstract: Enlargement of a crystal of a bulk oxide superconductor of REBa.sub.2 Cu.sub.3 O.sub.7-x, wherein RE is at least one of Y and rare earth elements, is effected by three dimensionally arranging layers of REBa.sub.2 Cu.sub.3 O.sub.7-x with a different RE in the order of decreasing (123) phase formation temperatures from the center outward, or by forming a stack of layers of RE Ba.sub.2 Cu.sub.3 O.sub.7-x with a different RE in the order of decreasing (123) phase formation temperatures; the size of the layer being enlarged along with a decrease in the (123) phase formation temperature.

Abstract: A process for producing crystallites comprising silica and antimony containing tin oxide. The quantity of antimony within the tin oxide can be reduced, thereby permitting production a powder which is absent a blue coloration.

Abstract: The present invention comprises novel oxide materials exhibiting bulk superconductivity up to and exceeding 85K and processes for their synthesis. The oxides are within the formula R.sub.a Ba.sub.b Cu.sub.c O.sub.d wherein 1.9<a<2.1, 3.9<b<4.1, 6.8<c<7.2, 14.4<d<15.2 and wherein R is Y or any of the lanthanide rare earth elements. Certain substitutions such as Ca and La on the R and Ba sites are included.