摘要:
In a filtration device (1) comprising a pressure-resistant housing (2) with a liquid inlet opening (3) and an outlet opening (4) for filtered matter, into which a collecting channel (12) terminates, at least one filter element (8–11) designed as flat membrane is connected to the collecting channel (12) in a pressure-tight manner. This device provides a high liquid throughput at the same time having a compact construction.
摘要:
In a filtration device (1) comprising a pressure-resistant housing (2) with a liquid inlet opening (3) and an outlet opening (4) for filtered matter, into which a collecting channel (12) terminates, at least one filter element (8-11) designed as flat membrane is connected to the collecting channel (12) in a pressure-tight manner. This device provides a high liquid throughput at the same time having a compact construction.
摘要:
The invention relates to a method for the production of ceramic coatings on metallic and/or ceramic surfaces, especially pipe walls and the linings of pipe wall in boilers, in order to protect coated surfaces from corrosion and adhesion problems, in addition to relating to coatings which can be produced according to said method. The ceramic coatings are characterised in that the coating contains boron nitride in order to form a low-energy surface, and ceramic nanoparticles as temperature-stable binding agents which, on account of their high specific powder surfaces, act as binders, or alternatively glass-type binder systems based on metal organyl compounds.
摘要:
A colloidal system of ceramic nanoparticles in a dispersion medium is characterized in that the nanoparticles dispersed in the dispersion medium are distributed by 90% or more portions as unimodal nanoparticles having the same particle size in the dispersion medium, wherein the particle size variation decreases from 50%, related to nanoparticles of 1 nm, to 10% for nanoparticles of 100 nm, and the atoms and/or ions located in the surface of the nanoparticles are saturated in terms of valence in dependence on the concentration of the nanoparticles in the dispersion medium using a surface modificator such that an energetic balance of the nanoparticles in the dispersion medium is obtained. The presented colloidal system is characterized by a great stability and keeps the unimodal/monomodal nanoparticles homogeneously distributed and suspended in the dispersion medium.
摘要:
An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of
摘要:
The invention concerns a method for producing a highly-porous ceramic layer and for application of this layer onto metallic, ceramic, enameled and/or glass substrates using porous, ceramic particles, preferably aluminum oxide, titanium oxide and zircon oxide, and an inorganic binder system. The inorganic binder system contains at least one ceramic nanoparticle of a particle size of less than 100 nm, preferably less than 50 nm and particularly preferred less than 25 nm, the solvent being water. Layers produced in this fashion are suited as self-cleaning catalytically active layers e.g. in ovens, in combustion engines etc. or for general coating of substances to considerably increase their specific surface e.g. for catalytic substrates.
摘要:
An inorganic binder for the production of ceramic, glass ceramic and other mineral materials and composite materials comprises at least one inorganic compound having a mean particle size of
摘要:
A layer or coating which counteracts crystalline deposits on a substrate includes a matrix composed of a binder system and ceramic particles, and also boron nitride in particle form, wherein the boron nitride particles are incorporated into the matrix and are distributed essentially homogeneously therein.
摘要:
The invention concerns a method for producing porous ceramic layers on metallic, ceramic, enameled or glass substrates using crystalline nanoparticles of particle sizes of between 3 nm and 100 nm via a wet-chemical process and functionalising of this porous ceramic layer through introducing a second component into the pores of the porous ceramic layer which serves as carrier layer.The porous ceramic layers can be filled with hydrophobizing, hydrophilizing, dirt-repellent and corrosion-inhibiting substances which remain in the substrate or are supplied later on demand, or with bactericidal substances, aromatics, perfumes or inhalation substances which are delivered to the room air in precise doses.
摘要:
This specification describes the use of a composition comprising a nanoscale powder, a porous ceramic powder and a solvent for protecting a metallic surface against chemical attacks at high temperatures, in particular in a reducing and/or carburizing atmosphere, and also a corresponding process. Furthermore, this specification describes a plant part having a metallic surface which, in the operating state, is exposed to a reducing and/or carburizing atmosphere, wherein the surface is coated with a porous protective coating having a specific surface area of at least 20 m2/g.