摘要:
Provided herein are methods for forming nanofibers. The current disclosure provides ceramic nanofibers, morphology-controlled ceramic-polymer hybrid nanofibers, morphology- controlled ceramic nanofibers, core-sheath nanofibers and hollow core nanofibers using ceramic precursor materials and polymer materials which are combined and undergo electrospinning. The current disclosure provides for methods of forming these nanofibers at low temperatures such as room temperature and in the presence of oxygen and moisture wherein the ceramic precursor cures to a ceramic material during the electrospinning process. Also disclosed are the nanofibers prepared by the disclosed methods.
摘要:
Disclosed are ceramic bodies comprised of a tialite phase and at least one silicate phase with a rare earth oxide and zirconium additions and methods for the manufacture of the same.
摘要:
Disclosed herein is a ceramic body comprising at least one phase comprising a pseudobrookite-type crystal structure and at least one phase comprising zirconium tin titanate. Also disclosed are porous ceramic honeycomb structures comprising a ceramic body comprising at least one phase comprising a pseudobrookite-type crystal structure and at least one phase comprising zirconium tin titanate and methods of preparing a ceramic body comprising at least one phase comprising a pseudobrookite-type crystal structure and at least one phase comprising zirconium tin titanate.
摘要:
Um ein Verfahren zur Herstellung eines Formkörpers bereitzustellen, mittels welchem ein Formkörper mit guter Hochtemperaturbeständigkeit einfach herstellbar ist, wird vorgeschlagen, dass das Verfahren Folgendes umfasst: - Bereitstellen eines Gemisches, umfassend : - einen pulverförmigen Basisstoff, welcher ein vorgebranntes und/oder aufgemahlenes Cordieritmaterial und/oder ein vorgebranntes und/oder aufgemahlenes Mullitmaterial umfasst; - Herstellen eines Formkörpers durch Formen des Gemisches; - Brennen des Formkörpers, so dass Teilchen des Basisstoffes unter Erhalt der Teilcheneigenschaft miteinander verbunden werden.
摘要:
Disclosed herein are methods for controlling and/or predicting the shrinkage and/or growth of a ceramic honeycomb structure between a green body state and a fired state by adjusting the hydrated alumina content of the batch composition. Also disclosed herein is substantially clay-free cordierite honeycombs produced in accordance with such methods.
摘要:
Die vorliegende Erfindung betrifft einen porösen alpha-SiC-haltigen Formkörper mit gasdurchlässiger, offenporiger Porenstruktur umfassend plättchenförmige Kristallite, die zu einer zusammenhängenden, durchgehenden Skelettstruktur verbunden sind, wobei die Skelettstruktur zu mehr als 80 Gew.-%, bezogen auf das Gesamtgewicht an SiC, aus alpha-SiC bestehen, ein Verfahren zur Herstellung desselben sowie seine Verwendung als Filterbauteil.
摘要:
A method for preparing a palladium-gold catalyst containing a titania extrudate is disclosed. The titania extrudate is produced by using a carboxyalkyl cellulose and a hydroxyalkyl cellulose as extrusion aids. The titania extrudate has improved processibility and/or mechanical properties. After calcination, the extrudate is used as a carrier for the palladium-gold catalyst. The catalyst is useful in producing vinyl acetate by oxidizing ethylene with oxygen in the presence of acetic acid.