Abstract: It has been difficult to keep the voltage of a polymer electrolyte fuel cell stable for a long period of time because uniform water content control over the plane of the membrane-electrode assembly is impossible. A gas diffusion electrode is produced by forming a conductive polymer layer composed of conductive particles and a polymer material on a porous material composed of carbon fiber, and forming a catalyst layer composed of platinum-carried carbon particles on the plane of the conductive polymer layer. The conductive polymer layer is composed of conductive particles different in particle size, and the content of the conductive particles having the smaller particle size is decreased from one end towards the other end of the gas diffusion electrode.

Abstract: A paint for forming a heat absorbing film which exhibits a good binding property for binding with a conductive reflecting film, contains a black pigment, and a compound represented by Si(OR1)nR2m, where n+m=4, n=1 to 4, m=0 to 3, each of R1 and R2 is one of an alkyl group, an alkenyl group and an aryl group, or a hydrolyzate of the compound. Also, the present invention relates to a heat absorbing film formed out of this heat absorbing film paint and a color CRT provided with this heat absorbing film.

Abstract: Disclosed is a fuel cell comprising: a hydrogen-ion conductive polymer electrolyte membrane; a pair of electrodes sandwiching the hydrogen-ion conductive polymer electrolyte membrane; a first separator plate having a gas flow path for supplying a fuel gas to one of the electrodes; and a second separator plate having a gas flow path for supplying an oxidant gas to the other of the electrodes, wherein each of the electrodes has an electrode catalyst layer comprising at least a conductive carbon particle carrying an electrode catalyst particle and a hydrogen-ion conductive polymer electrolyte, the electrode catalyst layer being in contact with the hydrogen-ion conductive polymer electrolyte membrane, and at least one of the electrodes comprises a catalyst for trapping the fuel gas or the oxidant gas which has passed through the hydrogen-ion conductive polymer electrolyte membrane from the other electrode toward the electrode catalyst layer of the one of the electrodes.

Abstract: A porous supporting carbon body of a gas diffusion layer is provided with a larger number of smaller pores at its catalyst layer side and a smaller number of larger pores at the other side, particularly with an appropriate distribution of finer mesh at its catalyst layer side and coarser mesh at the other side. As a result, a high performance polymer electrolyte fuel cell is obtained in which water generated at the catalyst layer is quickly sucked out to the gas diffusion layer, and is evaporated at the gas diffusion layer to be effectively exhausted to outside the fuel cell, so that excessive water can be prevented from retaining in the gas diffusion electrode, with the polymer electrolyte membrane being maintained at an appropriately wet condition.

Abstract: The present invention provides a polymer electrolyte fuel cell having an increased reaction area by forming a gas channel, a proton channel and an electron channel very close to each other inside a catalyst layer. This polymer electrolyte fuel cell includes a hydrogen ion conductive polymer electrolyte membrane; and a pair of electrodes having catalyst layers sandwiching the hydrogen ion conductive polymer electrolyte membrane between them and gas diffusion layers in contact with the catalyst layers, in which the catalyst layer of at least one of the electrodes comprises carbon particles supporting a noble metal catalyst, and the carbon particles include at least two kinds of carbon particles adsorbing a hydrogen ion conductive polymer electrolyte in mutually different dispersed states.

Abstract: The present invention relates to an improvement in an anodic aluminum oxide coating on which microbials are easy to adhere and propagate, for constantly keeping it clean. The present invention provides an anti-microbial aluminum product comprising: a porous oxide coating covering the surface of the aluminum core for the product and an inorganic bacteria controlling ingredient being carried in the micropores of the oxide coating. The anodic oxide coating is preferably sealed.

Abstract: A cathode-ray tube having a color-selecting electrode which is secured to a fluorescent glass panel by fitting fixing springs provided on the color-selecting electrode to fixing pins, respectively, which are provided on the fluorescent glass panel. The fixing springs have a shape factor K in the range of from 10 mm.sup.3 /kg to 100 mm.sup.3 /kg, the shape factor K being given byK=(thickness).times.(breadth).sup.2 .times.(height)/(length)/(weight of color-selecting electrode)Thus, it is possible to suppress the shift of the relative position of the fluorescent glass panel and the color-selecting electrode and minimize the incidence of product failures due to misregistration of colors.

Abstract: [Purpose] 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.[Composition] 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 deodorizing and disinfecting apparatus having catalyst deterioration detection function of the present invention comprises: an air supply portion for inhaling air inside; an ozone generating portion for discharging ozone to the inhaled air: a catalyst for accelerating deodorizing and disinfecting actions and decomposition of the ozone disposed downstream from the ozone generating portion; an ozone sensor for detecting the concentration of remaining ozone disposed downstream from the catalyst; and means for repeating a cycle including stop of ozone discharge from the ozone generating portion for a predetermined time period when the concentration of the remaining ozone reaches a predetermined concentration or more, and for determining that the catalyst is deteriorated when a condition wherein an interval between times when the concentration of the remaining ozone is not less than a predetermined concentration becomes shorter than a predetermined time period is recognized at a predetermined frequency, and then

Abstract: According to the present invention, there is provided a metal oxide film resistor which has an insulating substrate, a metal oxide resistive film having at least a metal oxide film having a positive temperature coefficient of resistance and/or a metal oxide film having a negative temperature coefficient of resistance, and/or a metal oxide insulating film. The metal oxide film resistor is not affected by moisture or alkali ions in the insulating substrate. The resistance of the film itself does not change. The metal oxide film resistor is extremely reliable.

Abstract: A method for making a hydrogen storage alloy comprises subjecting a bulky hydrogen storage alloy to a first thermal treatment at a temperature ranging from 800.degree. to 1100.degree. C., cooling the thus treated alloy, grinding the cooled alloy to pieces having an average particle size of 20 .mu.m or below, and subjecting the pieces to a second thermal treatment in vacuum or in an atmosphere of an inert gas at a temperature of 200.degree. to 1050.degree. C. to obtain an alloy product. A hydrogen storage alloy obtained by the method is also described.

Abstract: A color cathode-ray tube is demagnetized or magnetized in a magnetic transfer process with a direct-current biasing magnetic field, using an alternating-current magnetic field which is attenuated to a median thereof in a median attenuating time of at least 0.1 second.

Abstract: A method of degaussing a cathode ray tube where two pairs of degaussing coils are arranged with one pair located at the top and bottom and the other to the right and left of the cathode ray tube after impaired color purity correction process of an electron beam has been carried out for the cathode ray tube using a magnetization process with a magnetization including an anticipated amount of degaussing for the cathode ray tube when the cathode ray tube is incorporated in a display device. The degaussing of a magnetic material within the cathode ray tube is then carried out with the anticipated amount of degaussing using the degaussing coils. In this way, a color cathode ray tub with no impaired color purity can be provided because the cathode ray trajectories corrected by magnetization in the magnetization process is not easily changed during use after incorporation in the display device.

Abstract: The composite layer according to the present invention comprises a substrate and a colored layer formed on the surface of this substrate. This colored layer contains a transparent layer and a coloring agent dispersed within the transparent layer, and this transparent layer is made of an inorganic gel or glass material, while the coloring agent contains dyes or pigments. The composite layers of the present invention are suitable for use in products such as construction materials with the appearance of marble, colored glass materials for decorative purposes, or color filters.

Abstract: A magnetic head of the present invention includes a pair of substrates which are formed of ferrite and sealed with sealing glass, wherein an averaged thermal expansion ratio of the sealing glass in the range of 30.degree. C. to a setting temperature .alpha..sub.Ts (glass) is smaller than an averaged thermal expansion ratio of the substrate in the range of 30.degree. C. to a setting temperature .alpha..sub.Ts (substrate); and a difference between a thermal expansion ratio at a glass transition temperature of the sealing glass and a thermal expansion ratio at a yielding temperature thereof is 2.times.10.sup.-3 or less.

Abstract: A semi-closed type of breathing apparatus includes an air exhaling duct for guiding breathing air exhaled from a mouthpiece to a canister filled with a carbon dioxide remover, and an air inhaling duct for guiding the breathing air, from which carbon dioxide has been removed, to the mouthpiece. The air inhaling duct and the air exhaling duct are designed in a double-duct structure such that the air inhaling duct is surrounded by the air exhaling duct. That is, the ducts are formed in a single hose. Therefore, detachment of the breathing apparatus from a user is easily performed, the overall appearance of the apparatus is not marred, and the entire construction of the apparatus is simplified.

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 sodium sulfur cell comprising an anode active material of metallic sodium, and a cathode active material of sulfur or sodium polysulfide, and a beta alumina solid electrolyte separator, the above active materials containing, as an impurity, calcium of at most 20 ppm and/or potassium of at most 200 ppm, by weight. The cell of the invention has excellent characteristics, particularly prolonged electromotive life.

Abstract: Proposed is a method for the preparation of a powder of lanthanum manganite having excellent flowability with an angle of repose not exceeding 45.degree.. Different from conventional methods for the preparation of lanthanum manganite powder by the calcination of a powder blend of thermally decomposable compounds of lanthanum and manganese or by the precipitation of a composite carbonate of lanthanum and manganese with addition of an aqueous solution of ammonium carbonate to an aqueous solution of lanthanum and manganese compounds followed by calcination of the composite carbonate, the invention proposes to precipitate the composite carbonate by the addition of ammonium carbonate in a particulate form to the aqueous solution of lanthanum and manganese compounds followed by calcination of the composite carbonate.

Abstract: A canister for use in a semi-closed type of breathing apparatus for removing carbon dioxide from breathing air circulating in a breathing circuit. The filling portion of the canister is designed in rectangular shape, and thus it can be smoothly assembled with the air tank, the breathing bag, the float adjusting device, etc. In addition, the inlet port and the outlet port are diagonally disposed to each other, so that a uniform flow of the breathing air can be performed in the main body.