摘要:
Process for preparing NbN superconducting material, characterized in that a bulk Nb is placed in powder including at least one metal which can be nitriding-burned, and then the powder is heated to be nitriding-burned in pressurized N.sub.2 atmosphere so that the bulk Nb is nitrided by the nitriding-burning of the powder.
摘要:
A process for producing a fibrous crystal or single crystal of a superconductor comprising bismuth, strontium, calcium, copper, lead and oxygen, having an atomic composition ratio represented by the formula Bi.sub.2-x Pb.sub.x Sr.sub.1.9-2.1 Ca.sub.1.9-2.1 Cu.sub.3 o.sub.y wherein 0
摘要:
There is disclosed a single crystalline fibrous superconductive composition represented by the atomic compositional formula: Bi.sub.2 Sr.sub.2 CaCu.sub.2 M.sub.X O.sub.Y wherein 0
摘要:
The present invention provides an SiGe-based thin film, a method for manufacturing this thin film, and applications of this thin film. The present invention relates to a method for producing, by sputtering, an SiGe-based semiconductor thin film to serve as a member of a thermoelectric transducing material component that is a constituent element of a sensor device whose signal source is a temperature differential and that transduces a local temperature differential into an electric signal, wherein the SiGe-based thin film is produced by heat treating a SiGe-based semiconductor thin film material after sputtering vaporization; to the above-mentioned method for forming a thin film wherein the substrate temperature and/or the plasma output is raised in the formation of the SiGe-based semiconductor thin film by sputtering vaporization, to form a thin film with a more highly crystallized structure; to an SiGe-based thin film produced by the above-mentioned method, which serves as a member of a thermoelectric transducing material component that is a constituent element of a sensor device whose signal source is a temperature differential and that transduces a local temperature differential into an electric signal, and which has been endowed with good thermoelectric characteristics by heat treatment; and to a gas sensor device containing as a constituent element the above-mentioned SiGe-based thin film.
摘要:
The present invention provides an SiGe-based thin film, a method for manufacturing this thin film, and applications of this thin film. The present invention relates to a method for producing, by sputtering, an SiGe-based semiconductor thin film to serve as a member of a thermoelectric transducing material component that is a constituent element of a sensor device whose signal source is a temperature differential and that transduces a local temperature differential into an electric signal, wherein the SiGe-based thin film is produced by heat treating a SiGe-based semiconductor thin film material after sputtering vaporization; to the above-mentioned method for forming a thin film wherein the substrate temperature and/or the plasma output is raised in the formation of the SiGe-based semiconductor thin film by sputtering vaporization, to form a thin film with a more highly crystallized structure; to an SiGe-based thin film produced by the above-mentioned method, which serves as a member of a thermoelectric transducing material component that is a constituent element of a sensor device whose signal source is a temperature differential and that transduces a local temperature differential into an electric signal, and which has been endowed with good thermoelectric characteristics by heat treatment; and to a gas sensor device containing as a constituent element the above-mentioned SiGe-based thin film.
摘要:
The present invention provides a method of manufacturing a porous thick film of an oxide that has extremely few cracks and can be satisfactorily used as an oxygen partial pressure detecting part of an oxygen sensor. The present invention relates to a method of manufacturing such a porous thick film as an oxygen partial pressure detecting part of a resistive oxygen sensor comprising taking a fine particle powder of an oxide containing cerium oxide as a raw material powder, preparing a paste containing the oxide, printing the paste onto a substrate by screen printing, calcining and sintering, the method comprising a step of carrying out heat treatment to effect particle growth from the average particle diameter of the raw material powder to a particle diameter less than the average particle diameter of the ultimately obtained thick film, a step of mixing the particle growth-effected powder with a solvent, a step of dispersing agglomerated particles in the solvent, a step of removing a precipitate, a step of evaporating off the solvent, and a step of mixing the resulting oxide with an organic binder to obtain the paste.
摘要:
This invention provides a complex oxide comprising the features of : (i) being represented by the formula:(A0.4B0.1M0.1)x/0.6Co2Oy wherein A and B are elements differing from each other, each represents Ca, Sr or Ba, M represents Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb or Lu, 1.7≦x≦2, and 3.8≦y≦5, (ii) having a Seebeck coefficient of 100 &mgr;V/K or more at a temperature of 100 K (absolute temperature) or higher and (iii) having an electrical resistivity of 10 m&OHgr;cm or less at a temperature of 100 K (absolute temperature) or higher. The complex oxide of the invention is a material composed of low-toxicity elements existing in large amounts, the material having superior heat resistance and chemical durability and a high thermoelectric conversion efficiency in a temperature range of 600 K or higher which falls in the temperature range of waste heat.
摘要:
A method for the production of a superconducting polycrystalline wire rod having all the crystal (a, b, c) axes thereof aligned is disclosed, which consists of a step of arraying a plurality of superconducting whiskers of a composition of Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8 (Bi-2212 phase) in such a manner as to parallellize the fiber axes of the whiskers and then aligning all the crystal axes of the superconducting whiskers with parallellized fiber axes and a step of heat-treating the resultant whiskers.
摘要:
An object of the present invention is to provide a core-shell-type cerium oxide microparticle, a dispersion solution comprising the microparticle, and a process for production of the microparticle or dispersion solution, and to achieve the object, the present invention provides a core-shell-type cerium oxide microparticle which has an average particle diameter of 30 to 200 nm and a coefficient of variation therein no greater than 0.25, and in which the secondary particle forming the core portion is spherical in shape and a polymer is attached to its surface, a dispersion solution of this cerium oxide microparticle and a dry powder from the cerium oxide microparticle dispersion solution, and a process of producing a core-shell-type cerium oxide microparticle or a dispersion solution thereof, which comprises the steps of: mixing a cerium salt and a polymer in an organic solvent to obtain a mixture; and heating this mixture under reflux at a prescribed temperature to precipitate core-shell-type cerium oxide microparticles, wherein the cerium salt is cerium nitrate and the particle diameter of the microparticles is adjusted using the molecular weight of the polymer.
摘要:
Disclosed herein are core-shell type zinc oxide microparticles, a dispersion containing such microparticles, and a production process and uses of the microparticles and the dispersion. As disclosed herein, the core-shell type zinc oxide microparticles have an average particle diameter of from 50 to 1,000 nm. The core is a secondary particle of spherical shape to the surface of which a polymer is attached as a shell. Methods for making the microparticles include the steps of: mixing together a zinc salt and a polymer in an organic solvent so as to obtain a mixture; and heating/refluxing the mixture at a predetermined temperature so as to cause core-shell type zinc oxide microparticles to precipitate, wherein the zinc salt is zinc acetate; and uses such as cosmetics, resins and fibers which contain the core-shell type zinc oxide microparticles and have an ultraviolet light blocking action.