Abstract:
The present invention relates to storage-stable product systems having high latency and good mechanical stability, which are suitable, inter alia, for premix formulations. Furthermore, the present invention relates to a method for producing the formulations according to the invention and the use thereof.
Abstract:
The invention relates to a method for the powder metallurgical production of a thermoelectric component or at least one semifinished product of the component. The aim of the invention is to provide a method which can be carried out using standardized machines. Additionally, post-machining steps for leveling the substrate and the thermocouple legs should be prevented as much as possible. To achieve this, the pressing, placing, and sintering process steps are carried out on different machines so that standardized machines can be used for as many method operations as possible. An essential aspect of the invention consists in that the sintering and the leveling processes are carried out in a work step in which flat sintering electrodes that are arranged plane-parallel to the substrate are used, said electrodes being brought towards the substrate so as to follow the sinter shrinkage. At the end of the sintering process, the spacing of the electrodes specifies both the substrate thickness as well as the length of the thermocouple legs, thereby ensuring a flush termination of the thermocouple legs with the substrate without further post-machining.
Abstract:
The invention relates to a method for separating particle mixtures into a first fraction and into a second fraction, the electric conductivity of the particle of the first fraction is greater than the electric conductivity of the second fraction. The aim of the invention is to provide a method by means of which a fine-grained particle mixture, in particular electrical scrap from photovoltaic modules or lithium-ion-batteries, can be separated in an economical manner. Said aim is achieved such that: a) a fluidised particle mixture containing two particle fractions having a different electric conductivity is provided; b) air is ionised equidirectionally by means of at least one corona electrode surrounded by air which is to be ionised; c) the ionised air is mixed with the fluidised particle mixture to obtain equidirectional, ionised, fluidised particle mixtures; d) particles of the second fraction from the ionised, fluidised particle mixture are condensed on a collecting electrode moving in relation to the ionised, fluidised particle mixture, said collecting electrode being earthed or being charged counter to the corona electrode; e) particles adhering to the collecting electrode are removed for forming a second fraction; f) the first fraction formed from the particles of the ionised, fluidised particle mixture not adhering to the collecting electrode is collected.
Abstract:
The present invention relates to suspensions which have a very low salt content and contain at least one precipitated silica, a process for producing them and also their use.
Abstract:
Sistema de producto que comprende - al menos un portador poroso, seleccionado del grupo ácidos silícicos de precipitación o geles de sílice en forma de polvos, granulados o microgranulados con un diámetro medio d50 mayor de o igual a 3 μm, - al menos un principio activo, que está incorporado en el portador poroso, y - al menos una sustancia protectora, de la que al menos una parte de toda la cantidad presente en el sistema de producto está incorporada en los poros del material portador, caracterizado porque, comprobado mediante un análisis de la capa atómica más externa del sistema de producto por medio de XPS, al menos una parte de la superficie más externa del sistema de producto se configura por el material portador y al menos el 10% de la superficie del sistema de producto, comprobado mediante un análisis de la capa atómica más externa del sistema de producto por medio de XPS, se forma por el material portador y no por principio activo/principios activos y/o sustancia protectora/sustancias protectoras.
Abstract:
The invention relates to a method for the powder-metallurgical production of a thermoelectric component or a semifinished version of the same. The method is carried out using standardized machines. Post-processing steps for equalizing substrate and thermolegs are to be avoided as far as possible. The process steps of pressing, insertion and sintering are carried out on different standardized machines. An essential aspect of the method is that the sintering and equalizing proceed in one working step and in that planar sintering electrodes that are arranged plane-parallel to the substrate are used, which are moved towards the substrate following the sinter shrinkage. At the end of the sintering operation, the spacing between the electrodes specifies not only the substrate but also the length of the thermolegs. This ensures a flush finish of the thermolegs with the substrate without further post- processing.