Abstract: In general, the invention relates to electro-conductive pastes containing binary glass frits and photovoltaic solar cells, preferably n-type photovoltaic solar cells. More specifically, the invention relates to solar cell precursors, processes for preparation of solar cells, solar cells and solar modules. The invention relates to a solar cell precursor comprising as precursor parts i. a wafer with a back face and a front face, wherein the front face comprises a p-doped layer ii. a first paste comprising Ag particles; Al particles in a range from about 0.01 to about 5 wt. %, based on the total weight of the paste; a vehicle; a glass frit in a range from about 0.1 to about 5 wt. %, based on the total weight of the paste, wherein the glass frit comprises a first glass frit with a glass transition temperature Tgl and a further glass frit with a glass transition temperature Tgf, wherein Tgf differs from Tgl by at least about 10° C.; an additive; superimposed on a first area on said p-doped layer.

Abstract: An aircraft air conditioning system including a process air line having a first end connected to a process air source to allow a flow of process air therethrough. A ram air channel of the air conditioning system allows ambient air flow therethrough. A heat exchanger unit is disposed in the process air line and arranged within the ram air channel to thermally couple process air flowing through the process air line to ambient air flowing through the ram air channel. A water extractor disposed in the process air line downstream of the heat exchanger unit extracts water from the process air. A water supply system supplies extracted water into the ram air channel. The water supply system has a control arrangement to control a fluid connection between the water extractor and the ram air channel in dependence on an operating state of the aircraft air conditioning system.

Abstract: In general, the invention relates to electro-conductive pastes with Ag-metal-oxide as additives and solar cells with high Ohmic sheet resistance, preferably photovoltaic solar cells. More specifically, the invention relates to solar cell precursors, processes for preparation of solar cells, solar cells and solar modules. The invention relates to an electro-conductive paste comprising the following paste constituents: a. At least 70 wt. % Ag particles, based on the paste, b. An organic vehicle, c. A glass, d. An Ag-metal-oxide, comprising Ag, a metal M or semiconductor element different from Ag, and oxygen.

Abstract: The invention relates to a thick film conductive composition comprising metal particles wherein the specific surface area of the silver particles measured by BET according to ISO 9277 is equal to or more than 1.8 m2/g; manganese oxide; glass particles; and an organic vehicle.

Abstract: The invention relates to a method for extruding curved extruded profiles. The extruded profile is formed in a matrix mounted upstream in a counter beam of an extruder system and is subsequently curved or bent due to the effect of external forces and separated, supported and arranged into partial lengths in the extrusion flow by means of a separating robot connected to a higher control mechanism and is discharged to a storage area with the aid of a handling robot. The handling robot is coupled to the separating robot by means of the control mechanism and, like the separating robot, is moved into a starting position in front of the extrusion press.