Abstract:
An apparatus (10) for heat treatment of a wafer (28) is disclosed. The apparatus includes a heating chamber (18) having a heat source (20). A cooling chamber (32) is positioned adjacent to the heating chamber and includes a cooling source (40). A wafer holder (38) is configured to move between the cooling chamber and the heating chamber through a passageway (54) and one or more shutters (52) defines the size of the passageway. The one or more shutters are movable between an open position where the wafer holder can pass through the passageway and an obstructing position which defines a passageway which is smaller than the passageway defined when the shutter is in the open position.
Abstract:
Sinterofen (1) zum Sintern von dentalen Werkstücken (2), wobei der Sinterofen (1) ein Heizelement (3) mit einem Aufnahmeraum (4) zur Aufnahme des Werkstücks (2) während des Sinterns aufweist und der Aufnahmeraum (4) ein Teilbereich eines Innenraums (5) im Inneren des Heizelements (3) ist und das Heizelement (3) Siliziumkarbid aufweist oder daraus besteht, wobei das Heizelement (3) zumindest bereichsweise als geschlitztes Rohr ausgebildet ist und der Schlitz (6) in das Heizelement (3) bildenden Rohr in einem Heizbereich (7), in dem das Heizelement (3) den Aufnahmeraum (4) umgibt, spiralförmig ausgebildet ist.
Abstract:
A retort (10) including a thermally insulated casing (12) defining a furnace chamber (14) therein; one or more columns (15) provided within said chamber (14), each column (15) comprising a plurality of vertically orientated, vertically spaced, heat resistant tubes (16, 18, 20, 22), wherein the cross-sectional area of each tube is smaller than that of an adjacent, lower tube, and wherein the ends of adjacent tubes are arranged so as to provide an annular space (24, 26, 28) therebetween, an inlet (17) through which a combustible charge is fed into the uppermost tube (16), an outlet (30) from which reacted charge is removed from the lowermost tube (22); and a fluid conduit (36) for conveying combustible volatiles evolved by heating said charge to a gas burning means (31, 32) for combustion, to thereby provide heat to said retort (10).
Abstract:
Disclosed is a thermal insulation to be inserted between two structures, surfaces, walls or the walls of components which are to be insulated. The thermal insulation consists of an plurality of hollow spheres made up by loose hollow spheres or by hollow spheres which are interconnected by sintered contacts. The ratio of the outer diameter of the hollow spheres to their wall thickness is 5 300. The hollow spheres are made of silicides, silicide composites, metals and intermetals and the alloys thereof, ceramics or glass. When the walls of the hollow spheres have a closed porous structure, the inner pressure in the hollow spheres is between 0 to 0.1 that of the surrounding air pressure at room temperature.
Abstract:
The present invention relates to a device (10) for increasing metal evaporation efficiency in containers (3), preferably for use in crucibles (3), in vacuum distillation systems, wherein at least a condenser (8) is provided, said device (10) comprising at least a perforated surface (1), on which a plurality of through holes (5) is provided, said surface (1) being vertically movable with respect to said container(3), with a vertical stroke permitting to said surface (1) to dip within the melting liquid (2) contained in said container (3), said device (10) further comprising lateral edges (4), coupled above said surface (1), so as to realize a continuous wall, said edges along with said surface (1) realizing in combination with said perforated surface (1), a hollow/container suitable for collecting and containing an amount of said melting liquid (2) dripping through said holes (5). The invention also relates to a method which uses said device (10).
Abstract:
In a system for thermally processing materials, at least one slot eductor is disposed in a wall or roof surface of the furnace chamber to provide circulation of gas within the furnace chamber.