Abstract:
A method of fabricating a catalyst carrier, comprises forming a slurry of ceramic particles in a liquid carrier, the liquid carrier comprising a binder species, applying the dispersion to a non-sacrificial mould surface having formations provided therein or thereon, causing the binder species to set to provide a green form, removing the green form from the mould surface, drying and firing the green form, wherein the setting of the binder species to provide a green form which is removeable from the mould surface, preferably, takes less than 120 minutes. Catalyst carriers and tape casting apparatus for making the same are also disclosed.
Abstract:
Die Erfindung betrifft eine Glühkerze und Verfahren zu ihrer Herstellung, die aus einem elektrisch leitenden und einem elektrisch nicht leitenden Element hergestellt worden ist, wobei für die Herstellung gesinterter Keramikverbundwerkstoff eingesetzt worden ist. Diese Glühkerzen können bevorzugt für mit Kraftstoffen betriebene Standheizungen von Kraftfahrzeugen eingesetzt werden. Gemäß der gestellten Aufgabe sollen Sie kostengünstig und flexibel hergestellt werden können und gleichzeitig eine erhöhte Lebensdauer und Oxidationsresistenz erreichen. Dabei ist das leitende Element an zwei gegenüberliegenden Seiten vom elektrisch nicht leitenden Element eingefasst und es weist im distalen Bereich einen vergrößerten Querschnitt auf, dabei ein Querschnittsverhältnis von 2,5 bis 5 zu 1 in Bezug zum Querschnitt des elektrisch leitenden Elementes eingehalten ist. Der querschnittsverjüngte proximale Heizbereich des elektrisch leitenden Elementes ist zu 60 bis 85 % einer Oberfläche vom Werkstoff des elektrisch nicht leitenden Elementes überdeckt.
Abstract:
A method for forming particles having a ridge portion includes inducing flow of a slurry of particles and a reactant through one or more orifices, detaching an amount of the slurry from the slurry flow following exit from the one or more orifices, the detached amount forming a slurry body, forming the slurry body into a particle shape, contacting the particle shaped slurry body with a coagulation solution to form a stabilized particle having the ridge portion, and drying and/or sintering the particle having the ridge portion.
Abstract:
Reaction mixtures, gel compositions that are a polymerized product of the reaction mixtures, shaped gel articles that are formed within a mold cavity and that retain the size and shape of the mold cavity upon removal from the mold cavity, and sintered articles prepared from the shaped gel articles are provided. The sintered article has a shape identical to the mold cavity (except in regions where the mold cavity was overfilled) and to the shaped articles but reduced in size proportional to the amount of isotropic shrinkage. Methods of forming the sintered articles also are provided.
Abstract:
A sol gel abrasive gain and the preparing method thereof are provided. The abrasive grains deriving from alumina powders have various shapes and sizes and can be used to make a bonded or coated abrasive product. The preparing method comprises: coating alumina monohydrate sol to a carrier backing by roller coating, knife coating or extrusion coating method, etc., drying the coating to a high-solid state in a continuous dryer such as backing treatment oven, festoon oven or drum dryer, then shaping and sizing by patterned rollers or screen web, etc., further drying the shaped gel and then calcining, impregnating and sintering the gel to obtain microcrystalline ceramic grains.
Abstract:
このCeドープのPZT系圧電体膜は、一般式:Pb z Ce x Zr y Ti 1-y O 3 で 示されるCeドープの複合金属酸化物からなる。また上記一般式中のx、y及びzは、0.005≦x≦0.05、0.40≦y≦0.55、及び0.95≦z≦1.15をそれぞれ満たす。更に上記CeドープのPZT系圧電体膜の分極量のヒステリシスはその中心から負側に4kV/cm以上シフトすることが好ましい。
Abstract:
A process for sintering silicon carbide is provided which includes the steps of providing a silicon carbide powder of silicon carbide granules; purifying the silicon carbide powder; subjecting the purified silicon carbide powder to a gel-casting process; removing the gel-cast part from the mold; drying the gel-cast part; obtaining a dried cast ceramic part (a green body) which is capable of green machining into a final desired shape; firing the green body in an oven at temperatures ranging from about 100°C to about 1900°C to remove or burn out any polymer remaining in the ceramic; and sintering the green body at temperatures ranging from about 1600°C to less than about 2200°C.