Abstract:
PROBLEM TO BE SOLVED: To provide a simple method and apparatus for producing an oxide nanocrystal of proper cubic system having a small particle size without carrying out additional heat treatment.SOLUTION: A method for producing an oxide nanocrystal comprises: (a) a process for introducing a host lattice ion as an organometallic complex or a volatile inorganic compound into at least one first evaporator (12); (b) a process for converting the complex or the compound into a vapor phase; (c) a process for transporting the formed vapor phase to at least one heating zone (18) of at least one reactor (16) by using one or more carrier gases and/or a carrier gas mixture and feeding one or more reaction gases and/or a reaction gas mixture to the heating zone; (d) a process for decomposing the complex or the compound in the heating zone (18) of the reactor (16) under a pressure of 1-1,000 mbar to form an oxide nanocrystal; and (e) a process for separating the oxide nanocrystal by at least one adsorption trap (20).
Abstract:
The invention relates to an illumination device (1) comprising at least one lamp (3, 3', 3''), at least one reflector (2) and a display unit (5) that is back-lit by the lamp (3, 3', 3''). According to the invention, at least some regions of a reflective surface (21) of the reflector (2) have a form representing the involute of a circle of a sub-element of the lamp (3, 3', 3''), said involute flaring by a factor greater than 1. A sub-region (31b) of the exterior (31) of a lamp bulb (3a) that faces the display unit (5) is provided with a coating (4) which partially absorbs the light emitted by the lamp (3, 3', 3'').
Abstract:
The invention relates to an operating device of at least one Hg low pressure discharge lamp (12) comprising a first (14a) and a second electrode coil (14b), a device (24) for providing a parameter that is correlated with the Hg vapor pressure in the Hg low pressure discharge lamp (12), a microcontroller (38) that is designed to provide a signal for operating the at least one Hg low pressure discharge lamp (12), wherein the signal is characterized by at least one lamp operating parameter that depends on the parameter correlated with the Hg vapor pressure, wherein the device (24) for providing a parameter correlated with the Hg vapor pressure in the at least one Hg low pressure discharge lamp (12) comprises at least one device for detecting emission spectra (18a, 20, 26, 28, 30) of at least pre-determinable spectral ranges, wherein the device for detecting emission spectra (18a, 20, 26, 28, 30) comprises at least one light pick-up device (18a) disposed in the beam path of the at least one Hg low pressure discharge lamp (12). The invention further relates to a corresponding method.
Abstract:
The invention relates to a discharge lamp, particularly a low-pressure discharge lamp, comprising a discharge vessel (2), two electrodes (3, 4) that are disposed at least in part inside the discharge vessel (2), and a first coating (9) which is arranged at least in some areas of an external face (23) of the discharge vessel (2) and is made of a first material. A second coating (10a, 10b) made of a second material is placed on the external face (23) of the discharge vessel (2), in the area (24, 25) of at least one electrode (3, 4).
Abstract:
The light-scattering bulb (1) is provided for a semiconductor retrofit lamp (R1), said bulb (1) having a basic hollow cylindrical shape. The bulb (1) has a main part (2) made of glass, and the main part (2) is coated with a light-scattering layer (4). The light-scattering layer (4) has scattering particles (P1, P2) distributed in a translucent base material. The base material is an inorganic lead-free base material (G), and the scattering particles (P1, P2) are inorganic scattering particles. A method is used to produce a bulb (1), said method having at least the following steps: coating the main part (2) made of glass with a coating agent, which is a starting material for producing the light-scattering layer (4) of the bulb (1); and drying some sections of the coating agent and baking the layer so as to convert same into the light-scattering layer (4), said drying process being carried out in a staggered manner in the flow direction of the coating agent. The invention can be used in particular for semiconductor retrofit lamps for gas discharge tubes and linear lamps.
Abstract:
The present invention relates to a low-pressure discharge lamp comprising a discharge vessel that delimits a gas-tight fill chamber holding a filling gas, wherein the side of the discharge vessel facing the fill chamber is coated at least partially with a phosphorescent material mixture for transferring electromagnetic radiation in the invisible range to the visible range. The object of the present invention is to provide such a low-pressure discharge lamp which is both energy saving and has a good efficiency. This is accomplished according to the invention in that primarily argon is provided as the filling gas and that the average grain size of the phosphorescent material mixture is greater than 5 µm.
Abstract:
Die vorliegende Erfindung betrifft eine Entladungslampe (1) mit einem Entladungsgefäß (2), einer ersten Schicht (8) mit einem ersten Leuchtstoff, die an einer Innenwand (7) des Entladungsgefäßes (2) angeordnet ist, um die Entladungsstrahlung in längerwellige Konversionsstrahlung zu konvertieren, und einer zweiten Schicht (9) mit einem zweiten Leuchtstoff, der von dem ersten Leuchtstoff verschieden ist, welche zweite Schicht (9) zwischen der Entladungsgefäßinnenwand (7) und der ersten Schicht (8) angeordnet ist; die spezifischen Flächengewichte des ersten Leuchtstoffs in der ersten Schicht (8) und des zweiten Leuchtstoffs in der zweiten Schicht (9) liegen bei jeweils mindestens 0,2 mg/cm2, und der zweite Leuchtstoff ist dazu ausgelegt, auf eine Anregung mit der Entladungsstrahlung und/oder der Konversionsstrahlung hin Emissionslicht in einem Emissions-Wellenlängenbereich > 400 nm zu emittieren, und zwar auf eine Anregung in einem Anregungs-Wellenlängenbereich von 300 nm bis 380 nm hin.
Abstract:
In different embodiments, a low-pressure discharge lamp (1) is provided. The low-pressure discharge lamp has a discharge vessel (2) and a coating structure (7). The coating structure is formed on an inner face of the discharge vessel (2). The coating structure (7) has first fluorescent particles (34) which have at least one fluorescent substance that emits red light and the average particle size of which ranges from 0.5 µm to 1.9 µm, second fluorescent particles (36) which have at least one fluorescent substance that emits green light and the average particle size of which ranges from 0.6 µm to 2.8 µm or from 1 µm to 4 µm, and third fluorescent particles (38) which have at least one fluorescent substance that emits blue light and the average particle size of which ranges from 1 µm to 4 µm.
Abstract:
The invention relates to a lamp comprising at least one light source (2; 2a to 2e) and an electronic operating device (6), electronic components (6a to 6c) of the operating device (6) being arranged laterally with respect to the light source (2, 2a to 2e, 18, 19).