摘要:
A process for producing a superconductor of an oxide system, which comprises uniformly mixing metal elements for constituting the oxide system at least partly in the form of acetylacetonates in a solvent with the rest, if any, being in the form of alkoxides, carboxylates and/or inorganic salts, hydroxides and/or oxides to obtain a homogeneous mixture, and sintering the mixture.
摘要:
A moisture sensitive material comprising a fired product consisting essentially of at least one member selected from the group consisting of a metal oxide and graphite, and a polymerized organo-silicon compound, and at least one member selected from the group consisting of alkali metal ions and halogen ions, doped on the fired product.
摘要:
A muffler of the absorption type for the exhaust gas of an internal combustion engine including a cylindrical porous sound-absorbing body 1, and a film 5 of the metal or other material formed cylindrically on the inner surface of the porous body 1. The film prevents clogging of the pores in the porous body and enables the absorption of the sound in a wide frequency range.
摘要:
A multilayer electrode battery which restrains temperature rise produced by an internal short circuit and has a compact size and a large battery capacity. The battery is a multilayer electrode battery which uses an electrode formed by providing positive temperature coefficient characteristics to at least one of an active material and an electronic conductive material in contact with the active material, and a collector of at least one of a positive electrode and a negative electrode, and which has a plurality of layers of multilayer electrode bodies.
摘要:
An electrode in which an active material 11 or 7, an electron conducting material 12 or a current collector 5 or 6 has PTC characteristics is used as at least one of positive and negative electrodes 1 and 2.
摘要:
A compound superconducting wire comprising a matrix of CuX alloy and a multiplicity of Z.sub.3 X filaments embedded in the matrix in a spaced relationship so as not to come into contact with each other wherein X is Sn or Ga and Z.sub.3 X is Nb.sub.3 Sn or V.sub.3 Ga. In a precursor, therefore, a multiplicity of filaments of a base metal material Z such as Nb are arranged in a Cu base metal metrix concentrically in layers around a center core of a base metal material X such as Sn, in which the spacing between any adjacent filaments arranged in a former boundary region of an .epsilon.-phase bronze layer having a certain radius from the center produced when the precursor is preheat-treated at a temperature of 300.degree. to 600.degree. C. is made larger than the spacing between any adjacent filaments arranged in the other matrix regions. Also disclosed is a precursor wire wherein a composite of a Cu base metal material and a base metal material X capable of forming an alloy with the Cu base metal material is used as a matrix without arranging a core of the base metal material X at the center, and a multiplicity of filaments of a base metal material Z are embedded in the composite in a spaced relationship.
摘要:
A process for producing a temperature and moisture sensitive element, which comprises a step of forming a first coating layer by applying a composition comprising a polymerized organo-silicon compound and an inorganic material onto a substrate, a step of forming a second coating layer apart from the first coating layer by applying the same composition as defined above onto the substrate, a step of heat-treating the first coating layer to form a moisture sensitive section, and a step of treating the second coating layer to form a temperature sensitive section by a treatment different from the heat treatment of the first coating layer.
摘要:
A muffler for exhaust gases of an internal combustion engine. The muffler is a hybrid consisting of gas expansion chambers defined by partitions in a muffler casing, and a sound-absorbing body. The sound-absorbing body includes a perforated pipe surrounded by a porous sound-absorbing material with a thin metal film sandwiched therebetween.
摘要:
A sound absorber comprises a layer of a composition of a heat resistant binder and an acidic solid catalyst which is coated on a porous metal substrate in the hardened form.
摘要:
There is provided a film bulk acoustic wave device comprising: a silicon substrate 1, a dielectric film 21 including a silicon nitride 16 formed on the substrate 1 and a silicon oxide 2 on the silicon nitride 16, a bottom electrode 3 formed on the dielectric film 21, a piezoelectric film 17 formed on the bottom electrode 3, and a top electrode 5 formed on the piezoelectric film 17, wherein a via hole is formed in such a manner that the thickness direction of a part of the silicon substrate 1 which is opposite to a region including a part where the top electrode 5 exists is removed from the bottom surface of the silicon substrate 1 to a boundary surface with the silicon nitride 16.