摘要:
A semiconductor component that is able to be produced simply, quickly, and yet reliably and that usable for power applications, and including a semiconductor chip, a lower, first main electrode layer formed on a first side of the semiconductor chip, a lower control electrode layer formed on the first side, an insulation layer formed on the first side between the lower first main electrode layer and the lower control electrode layer and which partly covers the lower first main electrode layer, an upper first main electrode layer which is formed on the lower first main electrode layer, an upper control electrode layer which is formed on the lower control electrode layer and the insulation layer and extends on the insulation layer partially above the lower first main electrode layer, and a second main electrode layer formed on a second side of the semiconductor chip.
摘要:
A semiconductor component that is able to be produced simply, quickly, and yet reliably and that usable for power applications, and including a semiconductor chip, a lower, first main electrode layer formed on a first side of the semiconductor chip, a lower control electrode layer formed on the first side, an insulation layer formed on the first side between the lower first main electrode layer and the lower control electrode layer and which partly covers the lower first main electrode layer, an upper first main electrode layer which is formed on the lower first main electrode layer, an upper control electrode layer which is formed on the lower control electrode layer and the insulation layer and extends on the insulation layer partially above the lower first main electrode layer, and a second main electrode layer formed on a second side of the semiconductor chip.
摘要:
Molecular sieves are modified by an ion exchange process where metal cations are introduced into the molecular sieves by means of solid state ion exchange. The solid state ion exchange can be carried out as follows: a weighed amount of calcined and activated zeolite is intimately mixed with a precalculated amount of PtCl.sub.2, PdCl.sub.2, RhCl.sub.3, CuCl.sub.2, V.sub.2 O.sub.5 or another compound of the noble metals (e.g., corresponding halides or oxides), the solids mixture is then heated in a current of inert gas (e.g., a current of helium gas or of nitrogen) to temperatures of 400.degree. to 600.degree. C., then cooled down to room temperature and subsequently reduced in a current of hydrogen for 10 to 14 hours at 280.degree. to 350.degree. C. in order to produce small metal clusters from the cationically introduced metal.
摘要:
In a straightening machine for straightening sections like rolled beams, wherein tools (11) are arranged on a plurality of mutually parallel driven straightening shafts (8, 9; 21a, 21b, 22a, 22b) disposed above and below the alignment line in the transport direction of the product to be straightened, and of which preferably the upper straightening shafts (2a, 21b) are adjustable for setting the straightening gap, the straightening shafts (2a, 21a, b) are individually adjustable and each have on both sides an adjusting means engaging straightening shaft ends (6, 7; 23a, 23b) whereby in straightening operations at least the adjusting means on the service side (6; 23a) remote from the drive side I is provided with a force (FA) acting opposite to the straightening force (FR) relevant hereto.
摘要:
A section straightening machine is operated by a method which involves passing the structural sections through the array of straightening tools. Section straightening forces are applied to adjustable shafts carrying the tools and adjusters at the service sides of the shaft applying forces acting counter to the section straightening forces.
摘要:
Molecular sieves are modified by an ion exchange process where metal cations are introduced into the molecular sieves by means of solid state ion exchange. The solid state ion exchange can be carried out as follows: a weighed amount of calcined and activated zeolite is intimately mixed with a precalculated amount of PtCl.sub.2, PdCl.sub.2, RhCl.sub.3, CuCl.sub.2, V.sub.2 O.sub.5 or another compound of the noble metals (e.g., corresponding halides or oxides), the solids mixture is then heated in a current of inert gas (e.g., a current of helium gas or of nitrogen) to temperatures of 400.degree. to 600.degree. C., then cooled down to room temperature and subsequently reduced in a current of hydrogen for 10 to 14 hours at 280.degree. to 350.degree. C. in order to produce small metal clusters from the cationically introduced metal.
摘要:
A section straightening machine is operated by a method which involves passing the structural sections through the array of straightening tools. Section straightening forces are applied to adjustable shafts carrying the tools and adjusters at the service sides of the shaft applying forces acting counter to the section straightening forces.
摘要:
Molecular sieves are modified by an ion exchange process where metal cations are introduced into the molecular sieves by means of solid state ion exchange. The solid state ion exchange can be carried out as follows: a weighed amount of calcined and activated zeolite is intimately mixed with a precalculated amount of PtCl.sub.2, PdCl.sub.2, RhCl.sub.3, CuCl.sub.2, V.sub.2 O.sub.5 or another compound of the noble metals (e.g., corresponding halides or oxides), the solids mixture is then heated in a current of inert gas (e.g., a current of helium gas or of nitrogen) to temperatures of 400.degree. to 600.degree. C., then cooled down to room temperature and subsequently reduced in a current of hydrogen for 10 to 14 hours at 280.degree. to 350.degree. C. in order to produce small metal clusters from the cationically introduced metal.
摘要:
The present invention provides a process for the production of cyanamide from urea and/or decomposition products thereof at an elevated temperature with the use of a microporous catalyst, wherein, as catalyst, there is used a zeolite and/or a silicoalumophosphate which is doped with transition metal cations selected from the Group IB and VIIB of the Periodic System. In this way, it is possible to increase the conversion, referred to urea, to 60 to 100%, the selectivity with regard to cyanamide thereby being from about 30 to 50% and with regard to the undesired melamine being .ltoreq.2%.