Abstract:
Composición de tinta metálica para decoración de substratos no porosos mediante la impresión por inyección de tinta sobre superficies no porosas que son sometidas a un tratamiento térmico tras la impresión, y que comprende, al menos un disolvente orgánico como un vehículo que es líquido a temperatura ambiente y, al menos una composición ligante formada por un compuesto organometálico incluyendo ligandos unidos al elemento metálico y una resina utilizada como agente ligante. Todo ello preparado de forma que las propiedades físicas de la tinta metálica tales como temperatura de ebullición, velocidad de secado, expansión de la gota impresa, punto de inflamabilidad y conductividad, sean las adecuadas para la consecución de la calidad de impresión necesaria.
Abstract:
The present invention relates to a ceramic filter comprising clay and a process for preparing the same. More specifically, the present invention relates to the ceramic filter, including wave- shaped ceramic paper and plate-shaped paper, having improved efficiency and performance that may optimize the process of coating and calcining inorganic binder by forming an outer wall thereon, using clay, and thus increase insulation effect and mechanical strength represented by the clay layer, and the process for preparing thereof.
Abstract:
The invention relates to a crucible for the crystallization of silicon and to the preparation and application of release coatings for crucibles used in the handling of molten materials that are solidified in the crucible and then removed as ingots, and more particularly to release coatings for crucibles used in the solidification of polycrystalline silicon. The objective of the inventor was to provide a crucible comprising a silicon nitride coating which is faster and cheaper to produce and which is stronger with an improved adherence to the walls. It has now been found that these problems can be solved with a crucible for the crystallization of silicon comprising a) a base body comprising a bottom surface and side walls defining an inner volume; b) a protective coating comprises 80 to 95 wt. % of silicon nitride and 5 to 20 wt. of a low temperature mineral binder, the total oxygen content ranging from 5 to 15 % by weight.
Abstract:
A porous ceramic body having increased strength is formed by exposing a porous ceramic body to a source of boron and heating the porous body to a sufficient temperature in an oxygen containing atmosphere to form the porous ceramic body. The porous ceramic body has a boron containing oxide glassy phase on at least a portion of the ceramic grains of the porous ceramic body.
Abstract:
A method for producing a ceramic article, the method comprising the steps of: a) freeze casting a green body; b) firing the green body to form a sintered body having residual porosity; c) impregnating the sintered body with a first impregnant material to form a barrier layer beneath the surface of the sintered body; d) impregnating remaining surface porosity of the sintered body with a second impregnant comprising a ceramic precursor other than a precursor for chromium oxide; and e) firing the sintered body to decompose the ceramic precursor to form ceramic.
Abstract:
Metallic aerogel compositions comprising an aerogel, e.g., RF or carbon aerogel, having metallic particles dispersed on its surface are disclosed. The aerogel compositions can have a uniform distribution of small metallic particles, e.g., 1 nanometer average particle diameter. Also disclosed are processes for making the aerogel compositions comprising contacting an aerogel with a supercritical fluid containing a metallic compound. The aerogel compositions are useful, for example in the manufacture of fuel cell electrodes.
Abstract:
The invention relates to a noble metal preparation for the production of noble metal decorations on substrates which may be decoratively glazed, by means of direct printing and indirect printing (transfer methodology). The print quality of the preparation, containing the noble metal compounds and a binding agent system, on highly curved glass may be improved where transfer methodology is used, whereby the binding agent system comprises a resin mixture of (a) 25 to 50 wt. % of polyamide resins, (b) 5 to 30 wt. % of sulphurised recent resin, (c) 10 to less than 20 wt. % of rosin-modified resins, (d) 10 to 40 wt. % of alkylphenol resins and (e) 0 to 30 wt. % of other compatible resins, whereby two or more components of said resin mixture are in the form of a reaction product formed at 50 to 150 DEG C, or/and one or more components of said resin system or reaction products can themselves be present in the form of a reaction product, formed at 50 to 150 DEG C in the presence of a sulphur-containing gelling agent and the noble metal compounds.
Abstract:
Bright precious metal preparations for producing decorative bright precious metal elements contain at least one precious metal compound and at least one base metal compound which serves as a flux, in a support medium. The inventive preparations, which are baked in at 1050 to 1300 DEG C, contain a flux with 0.3 to 1.0 wt. % of at least one cobalt compound calculated as CoO, and 0.2 to 0.7 wt. % of a chromium compound calculated as Cr2O3. The weight ratio of Cr2O3 to CoO is between 1.0 and 2.3.
Abstract:
A turbomachine component includes a silicon nitride substrate and a multilayer coating bonded to the substrate. The coating includes an interlayer of porous fibrous silicon nitride having a density of between 85-98 %. The coating also includes an outer layer formed of an oxide compound, preferably tantalum oxide, that is applied by Electron Beam-Physical Vapor Deposition. The combination of the silicon nitride interlayer and tantalum oxide outer layer serves to protect the substrate from the adverse affects of oxidation, impact by foreign objects and extreme operating temperatures.