Abstract: According to one embodiment, in a case where a DC electric field of 5 kV/mm is applied to a silicon nitride sintered body at 25° C., a ratio Q25(600)/Q25(5) of an accumulated charge amount 600 seconds after a start of application to an accumulated charge amount 5 seconds after the start of the application is not less than 1.0 and not more than 3.0. A thermal conductivity of the silicon nitride sintered body is 65 W/m·K or more.

Abstract: According to an embodiment, XRD analysis results of any cross section of a silicon nitride sintered body satisfy 0.001?(I20.5°+I22.8°+I34.3°+I38.7°)/(I33.6°+I36.1°)?0.300 and satisfy 0.002?(I31.8°+I37.2°)/(I33.6°+I36.1°)?0.100. I20.5°, I22.8°, I34.3°, and I38.7° are maximum peak intensities corresponding to hexagonal ?-SiAION crystals detected respectively at 20.5±0.3°, 22.8±0.3°, 34.3±0.3°, and 38.7±0.3°. I33.6° and I36.1° are maximum peak intensities corresponding to ?-Si3N4 crystals detected respectively at 33.6±0.3° and 36.1±0.3°. I31.8° and I37.2° are maximum peak intensities corresponding to R2Si3O3N4 crystals detected respectively at 31.8±0.3° and 37.2±0.3°. R is a rare-earth element.

Abstract: The present invention relates to a dental porcelain paste comprising glass powder (A), an organic solvent (B), and a coloring agent (C) that is decolorable by baking, and satisfying at least one condition selected from a condition (1): a color difference ?E* calculated from a color tone obtained by colorimetrically measuring in the L*a*b* color space the dental porcelain paste having a thickness of 0.5 mm before baking and a color tone obtained by colorimetrically measuring in the L*a*b* color space a baked product having a thickness of 0.5 mm obtained by baking the dental porcelain paste in vacuum at 740° C. is 8.5 or more, and a condition (2): a brightness difference ?L* calculated from a brightness obtained by colorimetrically measuring in the L*a*b* color space the dental porcelain paste having a thickness of 0.5 mm before baking and a brightness obtained by colorimetrically measuring in the L*a*b* color space a baked product having a thickness of 0.

Abstract: The present invention relates to a dental porcelain paste containing a cationic surfactant (A), glass powder (B), and an alcohol (C).

Abstract: An acoustic wave filter device includes first and second signal terminals, a series arm circuit connected between the first and second signal terminals and including series arm resonators, and a parallel arm circuit connected in series between the series arm circuit and a ground potential and including at least one parallel arm resonator. The series arm resonators include first and second series arm resonators having different anti-resonant frequencies from each other. The anti-resonant frequency of the first series arm resonator is lowest among anti-resonant frequencies of the plurality of series arm resonators. The first series arm resonator and the second series arm resonator are connected to each other without another circuit element interposed therebetween.

Abstract: An acoustic wave filter includes a divided resonator group and series arm resonators in a path connecting an input-output terminal and an input-output terminal to each other and parallel arm resonators each between a node in the path described above and the ground. The divided resonator group, the series arm resonators, and the parallel arm resonators each include an acoustic wave resonator including an interdigital transducer electrode on a piezoelectric substrate. The divided resonator group includes divided resonators coupled in series with each other. The IDT electrode included in the divided resonator includes a first withdrawal electrode. The IDT electrode included in the divided resonator includes a second withdrawal electrode different from the first withdrawal electrode with respect to the electrode finger structure.

Abstract: An impeller (58) for a radial turbine comprises a substantially conical hub (70), and a plurality of impeller blades (80) arranged along an outer periphery of the hub at regular intervals, wherein a tip end (80D) of each impeller blade is provided with a fin (82) projecting in a thickness-wise direction of the impeller blade over a prescribed region (X) extending along a chord length thereof from a first point (P1) at a first distance from an upstream end (80A) of the tip end to a second point (P2) at a second distance from a downstream end (80D) of the tip end.

Abstract: A semiconductor module, including: a stacked substrate; a semiconductor device element mounted on the stacked substrate, the semiconductor device element having an Ni layer at a back surface thereof; and a solder bonding the back surface of the semiconductor device element to the stacked substrate. The solder is formed of a composition containing: Sb in a range of more than 6 mass % but not more than 8.5 mass %, Ag in a range of 2 mass % to 4.5 mass %, Cu in a range of 1.25 mass % to 2.0 mass %, and Sn as a remaining portion thereof.

Abstract: An impeller (58) for a radial turbine comprises a substantially conical hub (70), and a plurality of impeller blades (80) arranged along an outer periphery of the hub at regular intervals, wherein a tip end (80D) of each impeller blade is provided with a fin (82) projecting in a thickness-wise direction of the impeller blade over a prescribed region (X) extending along a chord length thereof from a first point (P1) at a first distance from an upstream end (80A) of the tip end to a second point (P2) at a second distance from a downstream end (80D) of the tip end.

Abstract: A radial turbine impeller includes a hub having a substantially conical shape and multiple turbine blades provided on an outer peripheral surface of the hub at intervals in a rotational direction. The turbine blades include full blades and splitter blades arranged alternately in the rotational direction of the radial turbine impeller, the splitter blades having a shorter blade length in a fluid flow direction in the radial turbine impeller than the full blades. Each splitter blade has a part deviated in a direction opposite to the rotational direction from a midpoint of an interval in the rotational direction between adjacent ones of the full blades.

Abstract: An acoustic wave filter includes series arm resonators and parallel arm resonators each including an acoustic wave resonator including an IDT electrode including a pair of comb-shaped electrodes each including electrode fingers and a busbar electrode. An electrode finger connected to neither of the busbar electrodes of the pair of comb-shaped electrodes is a floating withdrawal electrode, and of all the electrode fingers of the pair of comb-shaped electrodes, the electrode finger that is connected to a same busbar electrode to which the electrode fingers on both sides thereof are connected is a polarity-reversing withdrawal electrode, and, of the series arm resonators, the series arm resonator having a lowest anti-resonant frequency includes an IDT electrode including the floating withdrawal electrodes, and the series arm resonator includes an IDT electrode including the polarity-reversing withdrawal electrodes.

Abstract: The present invention provides a paste-like dental glass composition having good ease of handling due to a reduction in paste runniness while enabling accurate shade adjustments with no discoloration to hues such as black or grey after firing. The present invention relates to a paste-like dental glass composition comprising a glass powder (A), and an organic solvent (B) having two or less hydroxyl groups within the molecule and a viscosity at 20° C. of 2,500 mPa·s or less, and being essentially free of an organic compound having three or more hydroxyl groups within the molecule.

Abstract: An acoustic wave filter device includes first and second signal terminals, a series arm circuit connected between the first and second signal terminals and including series arm resonators, and a parallel arm circuit connected in series between the series arm circuit and a ground potential and including at least one parallel arm resonator. The series arm resonators include first and second series arm resonators having different anti-resonant frequencies from each other. The anti-resonant frequency of the first series arm resonator is lowest among anti-resonant frequencies of the plurality of series arm resonators. The first series arm resonator and the second series arm resonator are connected to each other without another circuit element interposed therebetween.

Abstract: An acoustic wave filter includes series arm resonators and parallel arm resonators each including an acoustic wave resonator including an IDT electrode including a pair of comb-shaped electrodes each including electrode fingers and a busbar electrode. An electrode finger connected to neither of the busbar electrodes of the pair of comb-shaped electrodes is a floating withdrawal electrode, and of all the electrode fingers of the pair of comb-shaped electrodes, the electrode finger that is connected to a same busbar electrode to which the electrode fingers on both sides thereof are connected is a polarity-reversing withdrawal electrode, and, of the series arm resonators, the series arm resonator having a lowest anti-resonant frequency includes an IDT electrode including the floating withdrawal electrodes, and the series arm resonator includes an IDT electrode including the polarity-reversing withdrawal electrodes.

Abstract: An acoustic wave filter includes a divided resonator group and series arm resonators in a path connecting an input-output terminal and an input-output terminal to each other and parallel arm resonators each between a node in the path described above and the ground. The divided resonator group, the series arm resonators, and the parallel arm resonators each include an acoustic wave resonator including an interdigital transducer electrode on a piezoelectric substrate. The divided resonator group includes divided resonators coupled in series with each other. The IDT electrode included in the divided resonator includes a first withdrawal electrode. The IDT electrode included in the divided resonator includes a second withdrawal electrode different from the first withdrawal electrode with respect to the electrode finger structure.

Abstract: A heater of the present disclosure includes: a columnar heater main body including a ceramic body, and a heat generating resistor embedded within the ceramic body, the heat generating resistor being drawn out at a rear end portion of the ceramic body to a side surface of the heater main body; a tubular metal support member attached to the side surface of the heater main body, the metal support member including a first region joined via a bonding material to the heater main body and a second region spaced away from the heater main body, the metal support member being configured so as to open toward the rear end portion; and a lid body which is disposed between the heater main body and the second region to separate front end-side space and rear end-side space of the heater.

Abstract: A clutch apparatus includes a clutch hub, a clutch drum, a multi-plate clutch having inner clutch plates and outer clutch plates, a piston for pressing the multi-plate clutch, an electric motor, a moving mechanism for moving the piston in an axial direction in accordance with the amount of rotation of the electric motor, and a control unit for controlling the electric motor. When increasing a rotational force that is transmitted between the clutch hub and the clutch drum by increasing electric current that is supplied to the electric motor, the control unit moves the piston in the axial direction by temporarily supplying the electric motor with the electric current having a first current value that is greater than a second current value corresponding to a target rotational force that needs to be transmitted between the clutch hub and the clutch drum.

Abstract: A heater of the present disclosure includes: a columnar heater main body including a ceramic body, and a heat generating resistor embedded within the ceramic body, the heat generating resistor being drawn out at a rear end portion of the ceramic body to a side surface of the heater main body; a tubular metal support member attached to the side surface of the heater main body, the metal support member including a first region joined via a bonding material to the heater main body and a second region spaced away from the heater main body, the metal support member being configured so as to open toward the rear end portion; and a lid body which is disposed between the heater main body and the second region to separate front end-side space and rear end-side space of the heater.

Abstract: A clutch apparatus includes a clutch hub, a clutch drum, a multi-plate clutch having inner clutch plates and outer clutch plates, a piston for pressing the multi-plate clutch, an electric motor, a moving mechanism for moving the piston in an axial direction in accordance with the amount of rotation of the electric motor, and a control unit for controlling the electric motor. When increasing a rotational force that is transmitted between the clutch hub and the clutch drum by increasing electric current that is supplied to the electric motor, the control unit moves the piston in the axial direction by temporarily supplying the electric motor with the electric current having a first current value that is greater than a second current value corresponding to a target rotational force that needs to be transmitted between the clutch hub and the clutch drum.

Abstract: A toner is provided. The toner includes toner particles each including a binder resin and a release agent. From 20% to 80% by number of the toner particles satisfy the following formula (1) and (2): 2/3?T/Dv?1.5??(1) 1/3?R/Dv?1.0??(2) wherein Dv represents a volume average particle diameter of the toner particles; and T and R represent the longest cross-sectional diameters of each toner particle and the release agent contained therein, respectively, measured by observing cross-sections of the toner particles with scanning transmission electron microscope.