PURPOSE: To efficiently obtain a concentrated or dehydrated organic oxygenate by using an imperforate membrane including a poly(vinyl pyridine) separation membrane which is cross-linked using aliphatic polyhalogenide and concentration a prepared water based mixture of the organic oxygenate by pervaporation. CONSTITUTION: A prepared water based mixture of an organic oxygenate (e.g. isopropyl alcoho...

PURPOSE:To provide superconducting composite billet for extrusion excellent in extruding yield or/and yield point. CONSTITUTION:In the superconducting composite billet for extrusion on which covers 3, 4 are put on both ends of a metallic pipe 2 made of a stabilized metal filled with superconducting metallic bar material 1 adherently to the end of this superconducting metallic bar material 1, the f...

PURPOSE:To provide a metallic oxide material having a low specific gravity and excellent superconductive characteristics, to obtain the superconductive material having a good quality and minimized in impurities without employing an ultrahigh pressure synthetic device, and to obtain the material having a high super conductor integral ratio and having good characteristics as the superconductive mate...

PURPOSE:To improve the critical current density by mixing oxide superconductor raw materials, forming the mixture, baking in O2 and quenching the baked mixture to form an oxide superconducting material expressed by a specific formula. CONSTITUTION:Powdery raw materials such as Nd2O3, Dy2O3, BaCuO2 and CuO are mixed at prescribed weight ratios and the mixed powder is kneaded with a small amount of ...

PURPOSE:To improve the critical temperature of a superconducting material by forming a superconducting 1122 phase from a raw material having a specific compounding composition and adding Ca, Cu and Ti at prescribed molar ratios to the phase to form a superconducting 1223 phase. CONSTITUTION:The objective oxide superconducting material is produced by mixing powdery raw materials at specific weight ...

PURPOSE:To improve moisture and temperature cycle resistance by coating the surface of an oxide superconductor with a specific synthetic resin. CONSTITUTION:An oxide superconductor composite material is obtained by coating the surface of an oxide superconductor containing an alkaline earth metal such as a compound oxide of Y or a rare earth element, Ba and Cu or a compound oxide of Bi, an alkaline...

PURPOSE:To increase the pinning potential and reduce lowering of critical current density in a magnetic field by adding PbO to a raw material powder. CONSTITUTION:PbO is added to a raw material powder composed of Bi2O3, SrCO3, CaCO3 and CuO so that Pb may be contained in an amount corresponding to 10-20atm% based on Bi in the raw material powder. The obtained mixture is calcined and the resultant ...

PURPOSE:To change the crystal orientation from C axis (001) to a axis (100) or (110) by cooling a heated oxide superconductor thin film while bringing an active oxygen gas containing oxygen radical and oxygen ion into contact therewith. CONSTITUTION:A substrate 3 held by a substrate holder 2 is heated at >=400 deg.C and the inside of a vacuum tank 1 is vacuumed to 10<-6>-10<3> Pa to generate metal...

Disclosed is an aromatic copolyimide film prepared by chemical conversion of a copolyamide acid solution obtained by copolymerization of an aromatic tetracarboxylic acid component comprising from 30 to 50 mole % of biphenyltetracarboxylic acid dianhydride, 50 to 70 mole % of pyromellitic acid dianhydride, 60 to 80 mole % of p-phenylenediamine and 20 to 40 mole % of 4,4'-diaminodiphenyl ether. The ...

A mixture of rubber chemicals can be especially readily dosed if each chemical is embedded in a carrier material, strands (2, 3, 4), which bond to each other in a parallel manner, forming a strand bundle (1) and each or several strands (2, 3, 4) separately containing one of the chemicals and the chemicals being present in the desired ratio of the mixture in the strand bundle (1) in each cross sect...

An improved method and apparatus are disclosed for producing large area diamond depositions. A mixture of a carbon compound such as methane, hydrogen and argon is introduced into a DC arc plasma torch to form a plasma jet. The plasma jet is directed and trapped into a partially enclosed chemical vapor deposition zone confined within a reaction chamber of a CVD process. The chemical vapor depositio...

PC-1274 ATOMIZATION PROCESS Process for atomizing metal comprising quenching molten particulates atomized in or into a gas medium at the surface of a liquid quench medium, the position of which is adjusted to give a significant proportion of irregularly shaped particles in the powder product.

Microemulsions substantially consisting of: -- an aqueous solution, -- a perfluoropolyether having perfluoroalkyl end groups, -- a hydrocarbon compound, -- a fluorinated surfactant and optionally also of a hydrogenated or fluorinated alcohol, said microemulsions being in the form of a limpid or opalescent liquid, macroscopically consisting of a single phase, stable in a certain temperature range. ...

L'invention concerne un dispositif et une méthode pour effectuer des opérations et/ou interventions dans un puits qui comporte un tubage et est fore dans des formations géologiques comportant au moins deux zones distinctes. Le dispositif selon l'invention est notamment caractérisé en ce que le tubage comporte dans son intérieur un premier organe de connexion utilisable en milieu liquide, le premie...

A tread-brake unit comprises, as a unitary structure, a brake shoe (300) for engaging a vehicle wheel tread, a brake actuator (100) having an output member (19) via which the brake shoe (300) can, firstly, be moved into engagement with the wheel tread and, thereafter, a braking force generated by the actuator (100) can be transmitted to the brake shoe (300), and a slack adjuster (200) by which cle...