Abstract:
A gas sensor, characterized by having an electrode formed of a conductive oxide sintered body which contains a primary phase formed of a perovskite oxide containing at least La, Fe, and Ni; and a secondary phase formed of an La4M3O10 phase or an La3M2O7 phase (M=Co, Fe, Ni), wherein the conductive oxide sintered body has a conductivity of 300 S/cm or higher at room temperature.
Abstract:
The ceramic material of the present invention contains a crystalline phase of a complex oxide containing a Group II element M and a rare earth element RE. The Group II element M is Sr, Ca, or Ba. An XRD diagram of the ceramic material shows a first new peak between peaks derived from the (040) plane and the (320) plane of MRE2O4. Such a ceramic material may be manufactured by, for example, preparing a material containing MRE2O4 or a material capable of reacting in thermal spray flame to produce MRE2O4 as a thermal spray material, and thermally spraying the thermal spray material onto a predetermined object.
Abstract:
A superconducting wire includes a multilayer stack and a covering layer (stabilizing layer or protective layer). The multilayer stack includes a substrate having a main surface and a superconducting material layer formed on the main surface. The covering layer (stabilizing layer or protective layer) is disposed on at least the superconducting material layer. A front surface portion of the covering layer (stabilizing layer or protective layer) located on the superconducting material layer (front surface portion of the stabilizing layer or upper surface of the protective layer) has a concave shape.
Abstract:
A method of forming a scintillator includes processing soluble precursor ceramic lanthanide materials to form a calcined powder. This powder is spark plasma sintered to density the calinced powder into a lanthanide scintillator.
Abstract:
A component for a semiconductor processing chamber, the component including a substrate and a coating layer provided on a surface of the substrate, wherein the coating layer includes at least a first coating layer having a thermal emissivity of more than 0.98 to 1, having plasma resistance, and having a color value L in a range of 35 to 40 through a thickness direction thereof.
Abstract:
Disclosed are a composite oxide which is capable of maintaining a large volume of pores even used in a high temperature environment, and which has excellent heat resistance and catalytic activity, as well as a method for producing the composite oxide and a catalyst for exhaust gas purification employing the composite oxide. The composite oxide contains cerium and at least one element selected from aluminum, silicon, or rare earth metals other than cerium and including yttrium, at a mass ratio of 85:15 to 99:1 in terms oxides, and has a property of exhibiting a not less than 0.30 cm3/g, preferably not less than 0.40 cm3/g volume of pores with a diameter of not larger than 200 nm, after calcination at 900° C. for 5 hours, and is suitable for a co-catalyst in a catalyst for vehicle exhaust gas purification.
Abstract:
Perovskite materials of the general formula SrCeO3 and BaCeO3 are provided having improved conductivity while maintaining an original ratio of chemical constituents, by altering the microstructure of the material. A process of making Pervoskite materials is also provided in which wet chemical techniques are used to fabricate nanocrystalline ceramic materials which have improved grain size and allow lower temperature densification than is obtainable with conventional solid-state reaction processing.
Abstract:
A process for forming alkaline earth metal cerate nanoparticles comprises combining a stable cerium oxide aqueous colloidal dispersion with soluble alkaline earth metal salts while maintaining colloidal stability. The resulting alkaline earth metal salts may be calcined to form alkaline earth metal cerate particles having a perovskite structure.
Abstract:
The invention relates to a process for preparing cerium(III) compounds which comprises the steps of a) contacting a starting composition A comprising cerium dioxide and at least one further metal oxide selected from the group consisting of iron oxide, silicon dioxide, molybdenum oxide, lanthanum oxide, magnesium oxide and calcium oxide with at least one acid S and at least one iron component E comprising iron in the oxidation state 0 and/or II at a temperature ranging from 40 to 160° C. and at a pH of not more than 2 to obtain a solution L comprising cerium in the oxidation state III; b) adding at least one basic compound C to said solution L to obtain a solid F comprising at least one cerium(III) compound; c) separating off said solid F comprising at least one cerium(III) compound.
Abstract:
Composition in the form of a solid-solid solution which is phase stable at 1150° C./36 hours and at 1200°/4 hours and which exhibits a thermal stability in surface area of at least 15 m2/g after treatment at 1100° C./4 hours, the composition comprising oxides of zirconium and cerium wherein the oxide of zirconium is enriched, an oxide of erbium, gadolinium, dysprosium, or yttrium as a stabilizer in an amount of 10% to 30% by weight, and optionally one ore more dopant, the use of such composition in a system for exhaust gas after treatment, a process which is appropriate for the preparation of such composition and compositions obtainable by such process.