Abstract: An exhaust gas treating apparatus 1 includes; a case body 2 and a plasma producing means 3 capable of producing plasma inside the case body 2 and treats the substances to be treated contained in the exhaust gas by the plasma producing means 3. The plasma producing means 3 has one or more each of a pulse electrode 4 and a ground electrode 5 that are oppositely disposed in the case body 2 and has a pulse power source 6 capable of feeding a pulse current to the pulse electrode 4 by switching frequency and/or voltage for different values at predetermined time intervals. The substances to be treated contained in the exhaust gas can selectively be treated by switching frequency and/or voltage value for different values at predetermined time intervals so that plasma of a kind adequate for the substances to be treated contained in an exhaust gas is produced between the pulse electrode 4 and the ground electrode 5.

Abstract: A plasma generating electrode 1 of the present invention includes a plurality of unit electrodes 2 hierarchically layered at predetermined intervals, the unit electrodes 2 including a deficient unit electrode 2b in which a conductive film 4 has an absent portion and a normal unit electrode 2a in which the conductive film 4 does not have an absent portion. Spaces V formed between the unit electrodes 2 include a normal space Va formed so that the distance between conductive films 4 corresponds to the distance between the unit electrodes 2 and a deficient space Vb formed so that the distance between the conductive films 4 is greater than the distance between the conductive films 4 in the normal space Va. The plasma generating electrode 1 of the present invention can efficiently treat a plurality of predetermined components contained in a treatment target fluid by utilizing different types of plasma suitable for respective reactions by causing the treatment target fluid to flow only once.

Abstract: A particulate matter detection device includes a collection electrode that collects the particulate matter, a discharge electrode that allows a corona discharge to occur when a voltage is applied between the collection electrode and the discharge electrode, a measurement electrode, the impedance between the collection electrode and the measurement electrode changing when the collection electrode has collected the particulate matter, and a measurement section that detects a change in the impedance between the collection electrode and the measurement electrode, the particulate matter detection device detecting the particulate matter by charging the particulate matter contained in the gas by utilizing the corona discharge, collecting the charged particulate matter by the collection electrode by utilizing an electrostatic force, and detecting a change in the impedance between the collection electrode that has collected the particulate matter and the measurement electrode using the measurement section.

Abstract: A plasma generating electrode 1 of the invention includes at least a pair of electrodes 5, at least one electrode 5a of the pair of electrodes 5 including a plate-like ceramic body 2 as a dielectric and a plurality of conductive films 3 disposed in the ceramic body 2 and each having a plurality of through-holes 4 formed through the conductive film 3 in its thickness direction in a predetermined arrangement pattern, the through-holes 4 having a cross-sectional shape including an arc shape along a plane perpendicular to the thickness direction, an arrangement pattern of the through-holes 4a formed in at least one conductive film 3a being different from an arrangement pattern of the through-holes 4b formed in the other conductive film 3b. The plasma generating electrode 1 is capable of simultaneously generating different states of plasma upon application of voltage between the pair of electrodes 5 due to the different arrangement patterns of the through-holes 4 in the conductive films 3.

Abstract: A plasma generating electrode of the invention present includes at least a pair of electrodes 5, at least one electrode 5a of the pair of electrodes 5 including a plate-like ceramic body 2 as a dielectric and a conductive film 3 disposed inside the ceramic plate 2 and having a plurality of through-holes 4 formed through the conductive film 3 in its thickness direction, the through-holes having a cross-sectional shape including an arc shape along a plane perpendicular to the thickness direction. The plasma generating electrode can generate uniform and stable plasma at low power consumption.

Abstract: A particulate matter detecting apparatus (100) includes a detecting apparatus main body having a cavity (2) that is formed through the detecting apparatus main body, a particle charging section (3) that can charge particulate matter that has entered the cavity through an inflow-side end (6) of the cavity, a collection section (4) that can collect the particulate matter charged by the particle charging section (3) and measure the amount of the particulate matter, and an ion wind generation section (5) that allows the particulate matter charged by the particle charging section (3) to flow toward an outflow-side end (7) of the cavity, the particle charging section, the collection section (4), and the ion wind generation section (5) being provided inside the cavity in this order from the inflow-side end (6). The particulate matter detecting apparatus has a reduced size, shows only a small measurement error, and can be produced inexpensively.

Abstract: A plasma generating electrode capable of generating plasma with a high energy level by using a small amount of electric power is provided. The plasma generating electrode includes at least a pair of unit electrodes including a unit electrode as an anode and a unit electrode as a cathode, and can generate plasma by applying voltage, the unit electrode as an anode and the unit electrode as a cathode being disposed facing each other, and at least the unit electrode as an anode having a plate-like ceramic dielectric and a conductive film disposed in the ceramic dielectric, wherein the unit electrode as a cathode can emit secondary electrons in a number five times or greater than the number of cations (primary particles) which it receives when the cations produced in the process of plasma generation collide therewith.

Abstract: A plasma generating electrode according to the invention includes at least two opposing plate-shaped unit electrodes 2, each having a rectangular surface and four end faces, and a holding member 5 which holds at least one (fixed end 6) of a pair of parallel ends (pair of ends) of four ends of the unit electrode 2 corresponding to the four end faces, at least one of the opposing unit electrodes 2 being a conductive-film-containing electrode 8 including a ceramic body 3 and a conductive film 4, and a distance “a” (mm) from an edge of the conductive film 4 to an edge of the ceramic body 3 on the other pair of parallel ends (other pair of ends 9) of the four ends of the conductive-film-containing electrode 8 adjacent to the pair of ends and a thickness “c” (mm) of the ceramic body 3 satisfying a relationship “(c/2)?a?5c”. The plasma generating electrode 1 is effectively prevented from breaking due to thermal shock.

Abstract: The present invention provides a plasma generating electrode inspection device capable of efficiently inspecting the parallelism, flatness, surface roughness, and dielectric strength of a plasma generating electrode. A plasma generating electrode inspection device 100 includes a reference quartz plate 2 provided with a film-shaped transparent conductor 1 disposed on one surface (outer surface 2a), a reference spacer 3 disposed on the outer edge of the other surface (inner surface 2b) of the reference quartz plate 2, a reference clamper 4 which can secure a plasma generating electrode 11 as an inspection target between the reference spacer 3 and the reference clamper 4, and a pulse power supply 5 capable of applying a pulse voltage between the transparent conductor 1 and the plasma generating electrode 11 as an inspection target while changing the voltage.

Abstract: A plasma generation electrode capable of subjecting predetermined components contained in a fluid to be treated to their respective reaction treatments with plasmas having different intensities optimized on a reaction basis, by passing merely once the fluid to be treated, is provided. In the plasma generation electrode, a unit electrode is composed of a tabular ceramic material serving as a dielectric material and an electrically conductive film disposed in the inside of the ceramic material, a plurality of unit electrodes are layered at a constant spacing, the distance between the electrically conductive films disposed in the unit electrodes adjacent to each other is varied partly or the dielectric constant of the ceramic material constituting the unit electrode is varied partly, and plasmas having different intensities can be generated partly in the spaces.

Abstract: A dust-collecting electrode where at least one unit electrode between the unit electrodes facing each other includes: a ceramic dielectric body, a surface conductor disposed so as to cover at least a part of the surface of the ceramic dielectric body on the side where the unit electrodes face each other, and an internal conductive layer disposed inside the ceramic dielectric body and being electrically independent of the surface conductor. The dust-collecting electrode being capable of generating an electric field and silent discharge between the unit electrodes by applying voltage between the surface conductor of the one unit electrode and the other unit electrode and generating creeping discharge on the surface of the one unit electrode by applying voltage via the ceramic dielectric body.

Abstract: A dust-collecting electrode where at least one unit electrode between the unit electrodes facing each other includes: a ceramic dielectric body, a surface conductor disposed so as to cover at least a part of the surface of the ceramic dielectric body on the side where the unit electrodes face each other, and an internal conductive layer disposed inside the ceramic dielectric body and being electrically independent of the surface conductor. The dust-collecting electrode being capable of generating an electric field and silent discharge between the unit electrodes by applying voltage between the surface conductor of the one unit electrode and the other unit electrode and generating creeping discharge on the surface of the one unit electrode by applying voltage via the ceramic dielectric body.

Abstract: In a plasma generating electrode 1, at least one of opposing unit electrodes 2 includes a sheet-shaped ceramic dielectric 3 and a conductive film 4 disposed in the ceramic dielectric 3 and partially extending on the surface of the ceramic dielectric 3 opposite to the other unit electrode 2 on the end of the ceramic dielectric 3, and a conductive terminal 5 is electrically connected with the conductive film 4 extending on the surface of the ceramic dielectric 3 opposite to the other unit electrode 2 on the end of the ceramic dielectric 3. Therefore, simple and reliable electrical connection can be achieved.

Abstract: The present invention provides a plasma generating electrode inspection device capable of efficiently inspecting the parallelism, flatness, surface roughness, and dielectric strength of a plasma generating electrode. A plasma generating electrode inspection device 100 includes a reference quartz plate 2 provided with a film-shaped transparent conductor 1 disposed on one surface (outer surface 2a), a reference spacer 3 disposed on the outer edge of the other surface (inner surface 2b) of the reference quartz plate 2, a reference clamper 4 which can secure a plasma generating electrode 11 as an inspection target between the reference spacer 3 and the reference clamper 4, and a pulse power supply 5 capable of applying a pulse voltage between the transparent conductor 1 and the plasma generating electrode 11 as an inspection target while changing the voltage.

Abstract: There is provided a production process of a sheet-like dense cordierite sintered body which hardly generates cracks when dried and sintered, and has excellent formability. A production process of a sheet-like dense cordierite sintered body which has a step of forming a raw material containing cordierite powders having an average particle size of greater than 2 ?m but not greater than 4 ?m into a cordierite green sheet; and sintering the cordierite green sheet at from 1350 to 1450° C.

Abstract: A ceramic green sheet containing 100 parts by mass of a cordierite powder having an average particle diameter of 1.0 to 5.0 ?m and a BET specific surface area of 4.0 to 10.0 m2/g and 14.0 to 19.0 parts by mass of a binder. The ceramic green sheet is preferred to further contain 0.5 to 2.5 parts by mass of a dispersing agent and 5.0 to 9.0 parts by mass of a plasticizer relative to 100 parts by mass of the cordierite powder. The ceramic green sheet can be made, by firing, into a tape-shaped ceramic formed body which is dense and superior in thermal sock resistance.

Abstract: A plasma generation electrode capable of subjecting predetermined components contained in a fluid to be treated to their respective reaction treatments with plasmas having different intensities optimized on a reaction basis, by passing merely once the fluid to be treated, is provided. In the plasma generation electrode, a unit electrode is composed of a tabular ceramic material serving as a dielectric material and an electrically conductive film disposed in the inside of the ceramic material, a plurality of unit electrodes are layered at a constant spacing, the distance between the electrically conductive films disposed in the unit electrodes adjacent to each other is varied partly or the dielectric constant of the ceramic material constituting the unit electrode is varied partly, and plasmas having different intensities can be generated partly in the spaces.

Abstract: A plasma generating electrode 1 includes at least two plate-shaped unit electrodes 2 each of which faces each other and is capable of generating plasma upon application of a voltage between the unit electrodes 2, at least one of the unit electrodes 2 each of which faces each other including a plate-shaped ceramic dielectric 3 having a plurality of grooves 5 and/or a plurality of recesses 6 formed in at least one surface, and a conductive film 4 disposed inside the ceramic dielectric 3, the plasma generating electrode 1 capable of generating high-density plasma at edges 9 formed by a surface 21 of the ceramic dielectric 3 and side surfaces 22 of the grooves 5 and/or the recesses 6 upon application of a voltage between the unit electrodes 2, the high-density plasma having a density higher than that of plasma generated between the unit electrodes 2 in an area other than the vicinity of the edges 9.

Abstract: A plasma generating electrode according to the invention includes at least two opposing plate-shaped unit electrodes 2, each having a rectangular surface and four end faces, and a holding member 5 which holds at least one (fixed end 6) of a pair of parallel ends (pair of ends) of four ends of the unit electrode 2 corresponding to the four end faces, at least one of the opposing unit electrodes 2 being a conductive-film-containing electrode 8 including a ceramic body 3 and a conductive film 4, and a distance “a” (mm) from an edge of the conductive film 4 to an edge of the ceramic body 3 on the other pair of parallel ends (other pair of ends 9) of the four ends of the conductive-film-containing electrode 8 adjacent to the pair of ends and a thickness “c” (mm) of the ceramic body 3 satisfying a relationship “(c/2)?a?5c”. The plasma generating electrode 1 is effectively prevented from breaking due to thermal shock.

Abstract: A plasma generating electrode capable of generating plasma with a high energy level by using a small amount of electric power is provided. The plasma generating electrode includes at least a pair of unit electrodes including a unit electrode as an anode and a unit electrode as a cathode, and can generate plasma by applying voltage, the unit electrode as an anode and the unit electrode as a cathode being disposed facing each other, and at least the unit electrode as an anode having a plate-like ceramic dielectric and a conductive film disposed in the ceramic dielectric, wherein the unit electrode as a cathode can emit secondary electrons in a number five times or greater than the number of cations (primary particles) which it receives when the cations produced in the process of plasma generation collide therewith.