摘要:
A garnet ferrite used for a non-reciprocal circuit device contains Fe in an amount lower than the value derived from stoichiometry by 0.5% to 5%, and more preferably by 1% to 3%. The garnet ferrite can exhibit a low insertion loss in a high-frequency band of more than 5 MHz.
摘要:
A novel unsaturated copolymer of ethylene comprises a random copolymer of (i) ethylene, (ii) an .alpha.-olefin of 3 to 20 carbon atoms and (iii) at least one straight chain or branched chain nonconjugated triene or tetraene having one vinyl group in the molecule, which contains 30-92% by mol of ethylene units (i), 6-70% by mol of .alpha.-olefin units (ii) and 0.1-30% by mol of triene or tetraene units (iii), and which has a molar ratio of ethylene units (i) to .alpha.-olefin units (ii) of 40/60 to 92/8 (ethylene units (i)/.alpha.-olefin units (ii)) and an intrinsic viscosity (.eta.), measured in Decalin at 135.degree. C., of 0.05 to 10 dl/g. This novel unsaturated copolymer of ethylene is excellent in weathering resistance, heat resistance and ozone resistance and has a high vulcanizing rate.
摘要:
The invention provides a piezoelectric polymer material comprising a helical chiral polymer having a weight average molecular weight of from 50,000 to 1,000,000 and optical activity, the piezoelectric polymer material having: crystallinity as obtained by a DSC method of from 20% to 80%; a transmission haze with respect to visible light of 50% or less; and a product of the crystallinity and a standardized molecular orientation MORc, which is measured with a microwave transmission-type molecular orientation meter at a reference thickness of 50 μm, of from 40 to 700.
摘要:
A piezoelectric gas jet generator includes a piezoelectric vibrator and upper and lower volume-varying chambers formed above and below the piezoelectric vibrator. In order to effectively use the movement of air supplied with the vibration of the piezoelectric vibrator, plural upper supply pipes and lower supply pipes communicating with the upper and lower volume-varying chambers and protruding from an upper housing and a lower housing are made to protrude in a direction parallel to the plane of the piezoelectric vibrator so as to be parallel to each other. Here, the upper supply pipes and the lower supply pipes are located at different planar positions.
摘要:
A diaphragm air pump includes a diaphragm; and upper and lower housings that interpose the diaphragm such that a variable volume chamber is formed over and under the diaphragm. The diaphragm air pump vibrates the diaphragm to obtain a pump operation, a circular concave portion into which the diaphragm that is circular in plan view is fitted is formed in any one of the upper and lower housings, a ring-shaped groove for housing a seal member is formed in the other, the ring-shaped groove having inner and outer diameters which are set across the circular concave portion, and a ring-shaped elastic seal member which is compressively deformed across the periphery of the diaphragm by the upper and lower housings is housed in the ring-shaped groove.
摘要:
A non-reciprocal circuit element includes a magnetic plate, a common electrode, a first main segment, a second main segment, a third main segment, and a magnet opposing to the magnetic plate and the magnet applying a bias magnetic field. The temperature coefficient of the saturation magnetization of the magnetic plate is from −0.2%/° C. to −0.1%/° C. in the temperature range from −35° C. to 85° C. The temperature coefficient of the residual magnetization of the magnet is from −0.20%/° C. to −0.15%/° C. in a temperature range from −35° C. to 85° C.
摘要:
A check valve includes a valve component composed of an elastic material and having a flat circular seal and a shaft extending from the center of the seal; and a partition having a valve-supporting hole sustaining the valve component, a thin circular portion centered at the valve-supporting hole and having a diameter smaller than the seal, and vents through the thin circular portion. The shaft of the valve component is sustained by the valve-supporting hole in the partition, and the seal is deformed toward the partition such that the bottom surface of the seal is in line contact with a circular edge that is defined by the level difference between the partition and the thin circular portion at least in a state where the valve component does not receive fluid pressure.
摘要:
Disclosed are a biodegradable resin composition comprising a copolymer (A) with a weight average molecular weight of 1,000 to 30,000, which comprises a constituent unit (a-1) derived from a multivalent carboxylic acid except for an amino acid and a constituent unit (a-2) derived from a hydroxycarboxylic acid, and a biodegradable resin (B), which has excellent hydrolyzability and excellent transparency; and a biodegradable molded article composed of this biodegradable resin composition.
摘要:
Provided is an imprint product, which is for transcribing a fine pattern of a mold surface and which contains a fluorine-containing cyclic olefin polymer containing repeating unit represented by formula (1) and having a fluorine atom content rate of 40% to 75% by mass.
摘要:
A pump includes a diaphragm vibrated by a piezoelectric element and a case. An inlet orifice and an outlet orifice are disposed on an outer surface of the case. An inlet path connects the inlet orifice to an inlet and an outlet path connects the outlet orifice to an outlet. At least one portion of the inlet orifice and at least one portion of the outlet orifice are positioned higher than the diaphragm in the case, and portions of the inlet path and the outlet path connecting to the inlet orifice and the outlet orifice are positioned higher than the diaphragm.