Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 ?m to 1.3 ?m, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 ?m to 1.2 ?m.

Abstract: A fuel hose has an inner layer in a tubular shape and an outer layer provided in contact with an outer circumferential surface of the inner layer, and the inner layer is composed of a crosslinked body of a rubber composition containing the following (A) to (E), and the outer layer is composed of a crosslinked body of a rubber composition containing the following (F) to (G): (A) polyol-crosslinked fluororubber (B) polyol crosslinking agent (C) calcium hydroxide (D) triallyl isocyanurate (E) peroxide crosslinking agent (F) hydrin rubber (G) monoglyceride having an aliphatic hydrocarbon group having 10 or more and 22 or less carbon atoms.

Abstract: A fuel hose is provided, which includes an inner tube including a rubber layer and a rubber layer, a resin layer provided around an outer periphery of the inner tube and comprising a thermoplastic resin as a major component, and an outer tube provided around an outer periphery of the resin layer and including a reinforcement thread layer and a rubber layer. The inner tube of the fuel hose has a dynamic loss (Tan ?) of 0.3 to 1.2. The fuel hose has an outer diameter change ratio of not greater than 10% and a volume change ratio of not less than 15% when the internal pressure of the hose is increased by 1 MPa. The fuel hose is less costly, and has a fuel permeation resistance (fuel barrier property) as well as a pulsation suppressing property.

Abstract: A fuel hose is provided, which includes an inner tube including a rubber layer and a rubber layer, a resin layer provided around an outer periphery of the inner tube and comprising a thermoplastic resin as a major component, and an outer tube provided around an outer periphery of the resin layer and including a reinforcement thread layer and a rubber layer. The inner tube of the fuel hose has a dynamic loss (Tan ?) of 0.3 to 1.2. The fuel hose has an outer diameter change ratio of not greater than 10% and a volume change ratio of not less than 15% when the internal pressure of the hose is increased by 1 MPa. The fuel hose is less costly, and has a fuel permeation resistance (fuel barrier property) as well as a pulsation suppressing property.

Abstract: A separator for use in a solid polymer electrolyte fuel cell, including a membrane/electrode assembly including a fuel electrode and an oxidant electrode disposed on either side of a solid polymer electrolyte membrane; a first separator superposed against a surface of the oxidant electrode forming an oxidant gas flow passage; and a second separator superposed against a surface of the fuel electrode forming a fuel gas flow passage. The first separator and the second separator are composed of rectangular thin metal plates, with outer peripheral edges of the first separator and the second separator each bending inclined towards a secondary face thereof on an opposite side of a primary face thereof that is superposed against the membrane/electrode assembly, thereby integrally forming a reinforcing rib.

Abstract: A cell for use in a solid polymer electrolyte fuel cell, including a membrane electrode assembly including a fuel electrode and an oxidant electrode disposed on either side of a solid polymer electrolyte membrane, the assembly being sandwiched from either side by a first separator and a second separator to give a stacked construction. The first and second separator have a planar shape slightly larger than a solid polymer electrolyte membrane, with primary face seal rubber layers affixed to outer peripheral edge portions of primary faces of the first and second separator. Thus, an outer peripheral edge portion of the solid polymer electrolyte membrane projecting outwardly beyond the fuel and oxidant electrodes are held clamped fluid-tightly between the first and second separators by means of the primary face seal rubber layers of the first and second separators.

Abstract: A vacuum brake hose having excellent interlaminar bonding strength between a tubular inner layer and an outer layer, as well as available at low cost by mass production. The vacuum brake hose comprising the tubular inner layer formed by using acrylonitrile-butadiene rubber, a reinforcing fiber layer provided on an outer peripheral surface of the tubular inner layer and the outer layer formed on an outer peripheral surface of the reinforcing fiber layer by using chloroprene rubber, wherein the reinforcing fiber layer is impregnated with adhesive consisting essentially of components (A) to (C) and interlaminar bonding between the tubular inner layer and the outer layer is effected through the adhesive: (A) chloroprene rubber; (B) acrylonitrile-butadiene rubber; and (C) at least one filler of carbon black and a white filler.

Abstract: A rubber composition for an automotive non-water liquid delivery hose, which has good adhesion, comprises (A) chloroprene rubber, and (B) ethylene-propylene-diene terpoylymer containing 3% to 11% by weight of ethylidene norbornene and having a Mooney viscosity (ML1+4 at 100° C.) in the range of 20 to 150, wherein the mixture ratio by weight of the component (A) and the component (B) is set in the range of (A)/(B)=97/3 to 75/25.

Abstract: A rubber composition for an automotive non-water liquid delivery hose, which has good adhesion, comprises (A) chloroprene rubber, and (B) ethylene-propylene-diene terpoylymer containing 3% to 11% by weight of ethylidene norbornene and having a Mooney viscosity (ML1+4 at 100° C.) in the range of 20 to 150, wherein the mixture ratio by weight of the component (A) and the component (B) is set in the range of (A)/(B)=97/3 to 75/25.

Abstract: A hose material for a fuel cell which is superior in both of low extraction property and electrical isolation, and which also has excellent mechanical properties, and also a hose manufactured using the hose material. The hose material comprises: (A) an ethylene-propylene copolymer; (B) hydrophobic silica; (C) a peroxide crosslinking agent; and (D) carbon black.

Abstract: A vacuum brake hose having excellent interlaminar bonding strength between a tubular inner layer and an outer layer, as well as available at low cost by mass production. The vacuum brake hose comprising the tubular inner layer formed by using acrylonitrile-butadiene rubber, a reinforcing fiber layer provided on an outer peripheral surface of the tubular inner layer and the outer layer formed on an outer peripheral surface of the reinforcing fiber layer by using chloroprene rubber, wherein the reinforcing fiber layer is impregnated with adhesive consisting essentially of components (A) to (C) and interlaminar bonding between the tubular inner layer and the outer layer is effected through the adhesive: (A) chloroprene rubber; (B) acrylonitrile-butadiene rubber; and (C) at least one filler of carbon black and a white filler.

Abstract: A separator for use in a solid polymer electrolyte fuel cell, including a membrane/electrode assembly including a fuel electrode and an oxidant electrode disposed on either side of a solid polymer electrolyte membrane; a first separator superposed against a surface of the oxidant electrode forming an oxidant gas flow passage; and a second separator superposed against a surface of the fuel electrode forming a fuel gas flow passage. The first separator and the second separator are composed of rectangular thin metal plates, with outer peripheral edges of the first separator and the second separator each bending inclined towards a secondary face thereof on an opposite side of a primary face thereof that is superposed against the membrane/electrode assembly, thereby integrally forming a reinforcing rib.

Abstract: A rubber hose material for providing a rubber hose excellent in mechanical strength and with an intrinsic property (elongation) of rubber retained. The rubber hose material is formed by blending an ethylene-olefin resin (component (B)) as an organic filler into an ethylene-propylene rubber (component (A)).

Abstract: A separator for use in a solid polymer electrolyte fuel cell, including a membrane/electrode assembly including a fuel electrode and an oxidant electrode disposed on either side of a solid polymer electrolyte membrane; a first separator superposed against a surface of the fuel electrode forming a fuel gas flow passage; and a second separator superposed against a surface of the oxidant electrode forming an oxidant gas flow passage. A single type metal separator is produced by subjecting a rectangular thin metal plate to punching and drawing by means of pressing to produce upper and lower through-holes of a pair of opposite sides, as well as forming a plurality of recesses extending substantially parallel to connect the upper through hole of a first opposing side with the lower through-hole of an other opposing side. The single type metal separator, when flipped front to back, can be used as both the first and second separators.

Abstract: A cell for use in a solid polymer electrolyte fuel cell, including a membrane/electrode assembly including a fuel electrode and an oxidant electrode disposed on either side of a solid polymer electrolyte membrane, the assembly being sandwiched from either side by a first separator and a second separator to give a stacked construction. The first and second separator have a planar shape slightly larger than a solid polymer electrolyte membrane, with primary face seal rubber layers being affixed to outer peripheral edge portions of primary faces of the first and second separator superposed against the membrane/electrode assembly. Thus, an outer peripheral edge portion of the solid polymer electrolyte membrane projecting outwardly beyond the fuel and oxidant electrodes are held clamped fluid-tightly between the first and second separators by means of the primary face seal rubber layers of the first and second separators.

Abstract: A method for cleaning a fuel cell hose by eliminating impurities efficiently in a short time by means of extraction without affecting physical properties of the hose, and a fuel cell hose cleaned by the method. The method is for cleaning a fuel cell hose containing a rubber layer and/or a resin layer and comprises the steps of supplying an oxygenated solvent into the hose and sealing the hose, or entirely impregnating the hose with the oxygenated solvent.

Abstract: A rubber composition that is used for a fuel reforming system and has high resistance to fossil fuel and low extractability, as well as excellent extrusion moldability is provided. A rubber hose for the fuel reforming system using the rubber composition is also provided. The rubber composition for a fuel reforming system includes the following components (A), (B), and (C): (A) a fluorocarbon rubber; (B) carbon black having a specific surface area less than 28 m2/g as determined by a BET method; and (C) a non-sulfur-based cross-linker. The rubber hose for a fuel reforming system is made of the rubber composition.

Abstract: A rubber hose material for providing a rubber hose excellent in mechanical strength and with an intrinsic property (elongation) of rubber retained. The rubber hose material is formed by blending an ethylene-olefin resin (component (B)) as an organic filler into an ethylene-propylene rubber (component (A)).

Abstract: A hose material for a fuel cell which is superior in both of low extraction property and electrical isolation, and which also has excellent mechanical properties, and also a hose manufactured using the hose material. The hose material comprises: (A) an ethylene-propylene copolymer; (B) hydrophobic silica; (C) a peroxide crosslinking agent; and (D) carbon black.

Abstract: A hose material for a fuel cell system which is superior in both the properties of low extraction and electrical isolation, and also has excellent mechanical properties. The hose material comprises an ethylene-propylene copolymer and carbon black having a toluene discoloration of 30% to 50%.