摘要:
In the case of a device for the melting and/or crystallizing of non-ferrous metals, especially of silicon, provision is made, for improving the quality of the crystallized and block-shaped non-ferrous metal, for there to be arranged around a container for receiving the non-ferrous metal at least one controllable cooling element for the active removal of heat from the non-ferrous metal.
摘要:
Oven for non-metal melting, in particular silicon melting, with a housing enclosing an interior, at least one mould arranged in the interior for receiving a non-metal melt, at least one electrical heating device enclosing, at least partially, the at least one mould for influencing the temperature of the non-metal melt, and a power supply device connected in an electrically conductive manner to the at least one heating device for providing the heating device with a time-variable current I(t), wherein the current I(t) has a frequency of 0.1 Hz to 1000 Hz and the current I(t) is of a magnitude sufficient for setting a predetermined temperature of the non-metal melt, the currents in the plurality, where necessary, of heaters having a defined phase position in respect of one another.
摘要:
Method for producing a silicon ingot, comprising the following steps: providing a container to receive a silicon melt, providing a temperature control device to control the temperature of the silicon melt in the container, arranging raw material in the container comprising silicon and at least one nucleation agent to assist a heterogeneous nucleation in the silicon melt, and control of the temperature in the container for the directed solidification of the silicon melt, the nucleation agent comprising nanoscale particles.
摘要:
In a method for classifying the driving style of a driver in a motor vehicle, measured variables indicative of driving style are recorded and driving-style classification figures are determined by a comparison with reference values, parameter settings corresponding to the driving-style classification figures being carried out to adapt the functioning of a regulation and control unit. In order to improve the handling of a motor vehicle with the aid of a driver classification, it is provided that presettings for the driving-style classification figures are stored in the regulation and control unit of the motor vehicle, it being possible to prescribe driving-style classification figures for a plurality of different driver reaction stages, and that the current driver is classified in a prescribed driver reaction stage in the motor vehicle by measuring classifying indicators, and driving-style classification figures corresponding to the driver reaction stage are activated in the regulation and control unit.
摘要:
Method for producing silicon which is suitable as a starting material for producing a silicon melt for the fabrication of silicon blocks or silicon crystals, comprising the following steps: introducing a gaseous mixture of monosilane and hydrogen into a reactor, thermal degrading the gaseous mixture for forming silicon powder, separating the formed silicon powder produced from the gaseous mixture, and mechanical compacting the separated silicon powder with compacting rollers which having a roller jacket consisting of a ceramic material selected from graphite, glass and silicon nitride.
摘要:
A joint for a motor vehicle is provided with a housing (5), a bearing shell (4) arranged in the housing (5), a bearing journal (3), which has a bearing area (1) and a pivot area (2) and which is mounted pivotably and/or rotatably in the bearing shell (4) with the bearing area (1). The joint has at least one tensioning device (33), which is arranged in the housing 5, is designed as a solid body and by which a mechanical stress exerted by the bearing shell 4 on the bearing area 1 can be changed. The bearing shell 4 is springy at least in some areas and is deformable by the tensioning means 33 in a springy manner.
摘要:
A ball-and-socket joint for a motor vehicle, especially for the chassis of the motor vehicle, is provided, wherein the ball-and-socket joint has a ball-and-socket joint housing (4) provided with a joint opening (6) as well as a ball pivot (3). The ball pivot (3) includes a joint ball (1) and a pivot (2). The ball pivot (3) is mounted with its joint ball (1) rotatably and pivotably in the ball-and-socket joint housing (4) and protrudes with its pivot (2) from the ball-and-socket joint housing (4). A separate closing element (10), which closes a mounting opening (9) provided in the ball-and-socket joint housing at least partially, and at which at least one electronic component (11) is arranged, is fastened to the ball-and-socket joint housing (4).
摘要:
In a reactor for the decomposition of a silicon-containing gas, provision is made, to avoid silicon deposition on an inner wall of a reactor vessel, for at least one catalytically active mesh to be provided within a reaction chamber between at least one gas feed line and the inner wall (4). The mesh accelerates the thermal decomposition of the gas and reduces the deposition of silicon on the inner wall. Also described is a process for the preparation of silicon using the reactor according to the invention and the use in photovoltaics of the silicon prepared.
摘要:
Compacting device for the low-metal compaction of a powder with a casing which at least in part surrounds a working chamber, with a feed arrangement arranged on the casing and feeding a powder, which is to be compacted, into the working chamber, with at least a compacting roller which is rotatably arranged in the working chamber, comprises a roller jacket and, together with an opposing wall, forms a compacting gap for compacting the powder therein, characterised in that the at least one compacting roller consists of ceramic, at least on the roller jacket.
摘要:
Described is a process for producing sintered parts from an aluminum sintering mixture, wherein between 10 and 70% by weight of pure aluminum powder and between 30 and 90% by weight of an aluminum alloy powder are mixed to form an aluminum sintering mixture. The aluminum alloy powder is of the following composition: between 14 and 35% by weight of Si; between 1 and 7% by weight of Cu; between 0.3 and 2.5% by weight of Mg; between 0.3 and 6% by weight of a transition metal, the balance aluminum. The pure alloy powder and the aluminum alloy powder are each of a grain size of a maximum of 315 &mgr;m. The aluminum sintering mixture is mixed with between 0.5 and 2% by weight of compacting additive. The mix of alloy sintering mixture and compacting additive is compacted to form a green compact. The green compact is then sintered. As no low-melting phases occur in the invention, sintered bodies which are stable in respect of shape are reproducibly obtained in the sintering operation.