摘要:
A method of producing a laminated body having a ceramic porous body having a thickness of 300 μm or larger and a ceramic dense body having a thickness of 25 μm or smaller. A green body for the porous body and a green body for the dense body are laminated to obtain a laminate, which is then subjected to pressure molding by cold isostatic pressing to obtain a pressure molded body. The pressure molded body is sintered to obtain a laminated sintered body. By reducing the leakage rate of helium gas of the laminated sintered body to 10−6 Pa˜m3/s or lower, the operational efficiency of the cell can be improved, and the deterioration of the cell can be prevented to improve an output after the cell is subjected to initiation and termination cycle tests of operation.
摘要:
A dense cordierite based sintered body is provided, containing at least 93% by mass of cordierite among crystal components present in the sintered body. The average particle diameter of the particles constituting the sintered body is 2 μm or less.
摘要:
The invention provides an image forming apparatus where the useful life of the image carrier does not become significantly short. This system has a charging unit, a charge voltage loading unit, an exposure unit, a development unit, an image transfer unit and a control unit, wherein, when the transport interval of the plural recording materials is shorter than a predetermined time the AC charge voltage applied to the image carrier during the transport interval being a first AC charge voltage, and when the transport interval is longer than the predetermined time the ac charge voltage applied to the image carrier during the transport interval being a second AC charge voltage, the control unit makes the current running in the charging unit to which the second charge voltage is applied lower than the current running in the charging unit to which the first AC charge voltage is applied.
摘要:
It is an object to provide an electronic paper display system capable of communicating in non-contact with an electronic paper by transfer apparatus and managing information by use of an electronic paper high in illegibility and portability as a medium of information display. An electronic paper display system that communication is made with display apparatus 2 having an electronic paper and wireless tag from transfer apparatus 1 capable of accessing a PC or a network, to perform a personal identification, based on which display information is transferred. Meanwhile, by transfer apparatuses 1 arranged in plurality in a space, the electronic paper is detected to manage information.
摘要:
Optimum relationship of data between local features, a coding data quantity, a quantity that expresses picture quality, and local coding parameters, for each block is stored. Extracted local features of one to a plurality of frames are stored. Setting of local coding parameters of each block included in one to a plurality of frames is adjusted so that the distribution of coding data quantity of each block in one to a plurality of frames is optimized within a predetermined range of data quantity based on the stored optimum relationship and local features.
摘要:
An image forming apparatus includes a control voltage generation circuit which inputs a primary AC voltage to the primary side of a voltage transformer, generates a control voltage corresponding to a current generated on the secondary side of the voltage transformer in accordance with the primary AC voltage, and controls the primary AC voltage on the basis of the control voltage and a control signal, a current detection circuit which is connected, through a capacitor, to a path which supplies the current generated on the secondary side of the voltage transformer to a charge roller and detects a charge current to charge an image carrier, and a control circuit which determines the control signal on the basis of the relationship between a predetermined control signal (PRICNT) and a current value (Icap) detected by the current detection circuit in accordance with the predetermined control signal and controls the primary AC voltage to be generated by the voltage generation circuit.
摘要:
A silicon nitride porous body (5) obtained by nitriding a molded body having metallic silicon (3) as a main component, the porous body having a porous structure with an average pore diameter of 3 μm or above, and wherein the total content of silicon and nitrogen is 95% or above and the nitridation ratio of silicon is 90% or above. The silicon nitride porous body has a porous structure with a large average pore diameter, with a test specimen cut out from the porous body exhibiting large thermal conductivity and a small thermal expansion coefficient, and can be suitably used in a component for purifying gas and/or solution such as a ceramic filter.
摘要:
An image forming apparatus includes an electrophotographic photosensitive member rotated at a peripheral speed of 150 mm/second or more and a specific toner. The toner has a weight-average particle diameter from 5 to 12 &mgr;m, and of the toner having a circle-equivalent diameter of 3 &mgr;m or more, particles with a circularity of 0.900 or more are present at a rate of 90% or more in a number-based cumulative valve. The toner also satisfies one of two sets of conditions defined by the relationship between a cut rate and a weight-average particle diameter and the relationship between a number-based cumulative valve and a weight-average particle diameter. The cut rate Z is represented by the expression: Z=(1−B/A)×100 wherein A is a concentration of all the measured particles and B is a concentration of the measured particles whose circle-equivalent diameters are 3 &mgr;m or more.
摘要:
A honeycomb structure body which has a number of passages partitioned with partition walls and penetrating along the axial direction. A porous honeycomb structure body which contains refractory grains as filler, one or more elements selected from the group consisting of the rare earth elements, alkaline earth elements, Al, and Si, and the crystal containing one or more kinds of these elements. The present honeycomb structure body contains refractory grains such as silicon carbide grains and the like, but it can be produced at a relatively low firing temperature at a low price, it is sufficiently porous and high in specific surface area, and it can be used as a filter for purifying automobile exhaust gas, a catalyst carrier, and the like under the high SV conditions.
摘要:
A honeycomb structure made of a silicon carbide-based porous body and having a number of through-holes extending in the axial direction, separated by partition walls. The strength and Young's modulus of the silicon carbide-based porous body satisfy the following relation: Strength (MPa)/Young's modulus (GPa)≧1.1. The honeycomb structure contains refractory particles such as silicon carbide particles and the like and yet can be produced at a relatively low firing temperature at a low cost, has a high strength and a high thermal shock resistance, and can be suitably used, for example, as a filter for purification of automobile exhaust gas by a treatment such as plugging of through-channel at its inlet or outlet, or as a catalyst carrier, even under a high SV condition.