摘要:
Verfahren zur Herstellung eines keramischen Körpers (100), insbesondere eines Dentalkeramikrohlings, mit gezielt einstellbaren Ausprägungsgraden einer oder unterschiedlicher physikalischer Eigenschaften, wobei der keramische Körper (100) zur Steuerung einer gezielten Verteilung eines oder verschiedener chemischer Stoffe (101, 102), die zur Beeinflussung der physikalischen Eigenschaften des keramischen Körpers (100) geeignet sind, eine Porosität aufweist, und in einem ersten Schritt, der ein Beladungsschritt ist, mit einer oder mit mehreren Lösungen (104) des einen oder der verschiedenen chemischen Stoffe (101, 102) beladen wird. In einem zweiten Schritt, der ein Verteilungssteuerungsschritt ist, wird die Verteilung des einen oder der verschiedenen chemischen Stoffe (101, 102) innerhalb des porösen, keramischen Körpers (100) gesteuert, wobei ein Verlauf und/oder ein räumlicher Verlauf des Ausprägungsgrads der einen oder der unterschiedlichen physikalischen Eigenschaften einstellbar ist. Die Steuerung erfolgt durch Regelung eines oder mehrerer Umgebungsparameter (106) in einer Umgebung (108), insbesondere durch Regelung der Luftfeuchtigkeit und/oder des Drucks und/oder der Temperatur.
摘要:
The invention relates to a fire-resistant body with a porous material based on gypsum with an amphiphilic additive contained therein. Said fire-resistant body has a fire-resistant rating of at least F30 and a first area and a second area. The first area and the second area are different from each other with respect to at least one parameter selected from density, average diameter of the macropores, distribution width of the pore size distribution of the macropores and chemical composition. The invention also relates to a method for producing said fire-resistant body.
摘要:
The invention relates primarily to a method for treating a surface of a mineral substrate and to objects produced according to the method, in particular objects having a surface which is designed to be slip-proof, dirt-resistant, abrasion-optimized, scratch-resistant, heat-reflecting, self-cleaning and/or prevents fouling or is in general antimicrobial.
摘要:
There is disclosed a honeycomb structure which can suppress the increases of an initial pressure loss. There is provided a honeycomb structure including a honeycomb base material including a porous partition wall parent material to partition and form a plurality of cells which become through channels of a fluid; plugged portions arranged in open frontal areas of predetermined cells in an end surface on an inflow side of the fluid and open frontal areas of the remaining cells in an end surface on an outflow side of the fluid; and a porous collecting layer disposed on the surface of the partition wall parent material in the remaining cells. A melting point of a material constituting the collecting layer is higher than that of a material constituting the partition wall parent material, a pore surface area per unit volume of the collecting layer is 2.0 times or more a pore surface area per unit volume of the partition wall parent material, and a thickness of a portion of the collecting layer which penetrates into pores of the partition wall parent material is 6% or smaller of that of each of partition walls including the partition wall parent material and the collecting layer.
摘要:
The monolithic ceramic body comprises a mixed-oxide marginal region, which comprises an oxide of a first metal and an oxide of a further metal having a high affinity for oxygen, a metallic surface, layers made of further metals, and biocompatible and/or bioactive coatings. The metallic surface comprises the further metal on the marginal region. The mixed-oxide marginal region comprises a continuous concentration gradient of the first metal, starting from 100% in the core down to 0% in the transitional region to the metallic surface of the ceramic body, based on the total metal content. The monolithic ceramic body comprises a mixed-oxide marginal region, which comprises an oxide of a first metal and an oxide of a further metal having a high affinity for oxygen, a metallic surface, layers made of further metals, and biocompatible and/or bioactive coatings. The metallic surface comprises the further metal on the marginal region. The mixed-oxide marginal region comprises: a continuous concentration gradient of the first metal, starting from 100% in the core down to 0% in the transitional region to the metallic surface of the ceramic body, based on the total metal content; and a continuous concentration gradient of the further metal, starting from 0% in the core up to 100% in the transitional region to the metallic surface of the ceramic body, based on the total metal content. The oxygen concentration in the mixed-oxide marginal region remains constant, and the monolithic structure of the ceramic body has no phase boundaries. The further metal is biocompatible. A marginal zone of the ceramic body comprises the mixed oxide-marginal region, and the metallic surface on the marginal region exhibits a thickness of 0.05-140 mu m. An independent claim is included for a method of producing a ceramic body with a mixed oxide-marginal region.
摘要:
A coating having a thickness between 0.1 and 2 mm is obtained from a mixture with the following composition: - 10-25% by weight of micronized powder; - 40-60% by weight of inorganic gravels of petrographic origin of sizes comprised between 0.063 - 2 mm; - 10-40% by weight of a polymerisable base resin selected from polyurethane, polyester, epoxy or acrylic, with additives, and - optionally pigments; the proportion of the mentioned gravel and micronized powder of the coating being up to 90% in an inner most area of interphase between coating and surface of the petrous substrate, covering one third of the thickness of the coating. The method comprises depositing the mentioned mixture on the substrate and vibrating the assembly, and subsequently proceeding to a step of curing and subsequent mechanical finishing of the surface.
摘要:
Die vorliegende Erfindung betrifft einen monolithischen Keramikkörper mit Mischoxid-Randbereich und metallischer Oberfläche, wobei der Keramikkörper das Oxid eines ersten Metalls (I), einen Mischoxid-Randbereich, welcher das Oxid des ersten Metalls (I) und das Oxid eines weiteren Metalls (II), welches eine hohe Affinität zu Sauerstoff hat, umfasst, und eine metallische Oberfläche aus dem Metall (II) auf dem Mischoxid-Randbereich aufweist, wobei der Mischoxid-Randbereich einen kontinuierlichen Konzentrationsgradienten des ersten Metalls (I), ausgehend von 100% im Kern bis zu 0% im Übergangsbereich zu der metallischen Oberfläche des Keramikkörpers, bezogen auf den Gesamtmetallgehalt (I+II), und einen kontinuierlichen Konzentrationsgradienten des weiteren Metalls (II), ausgehend von 0% im Kern bis zu 100% im Übergangsbereich zu der metallischen Oberfläche des Keramikkörpers, bezogen auf den Gesamtmetallgehalt (I+II), aufweist, die Sauerstoffkonzentration in dem Mischoxid-Randbereich konstant bleibt, und die monolithische Struktur des Keramikkörpers phasengrenzenlos ausgebildet ist.